Archive for category: Tech Discussion

Can Adding Octane Boost Raise 91 Octane Gas To 94?

AMSOIL Dominator Octane Boost A reader asks: My car is now tuned for 94 octane gas. My local stations only provide a premium gas at 91 octane. Can I use AMSOIL Octane Boost to bring the 91 octane gas up to 94?

Our answer: We would not recommend attempting to use an octane boost to bring 91-octane gasoline up to 94-octane. With your engine tuned for 94-octane, damage from engine knock is a real concern if the fuel is not up to the task.

Therefore, the smartest option would be to re-tune your car for the locally-available 91-octane fuel.

Aren’t Octane Boosts Designed To Raise Gasoline Octane Levels?

Yes, but there is more to the story. For example, AMSOIL suggests that their Dominator Octane Boost product raises octane by “up to 4-points”.

But there are two reasons as to why using an octane boost additive may not bring the octane from 91 to 94.

First, gasoline quality can be very inconsistent. There’s no way of knowing that one is really starting with 91-octane. The actual octane at the pump may not be as advertised.

The second important factor is that there is a law of diminishing returns with octane boost products. The higher the octane starting point, the fewer octane numbers gained. Therefore, an octane boost will deliver a greater octane-number increase when 87 is the starting octane. Adding a boost additive to 91-octane gasoline may only yield a one or two octane-number gain.

It’s simply not possible to project whether an octane boost product is actually taking this fuel up to the desired 94-octane goal.

In our opinion, this particular strategy of trying to drag a 91-octane fuel up to 94 with an additive is based on hope and assumptions. The risk of pre-ignition issues far outweighs the benefit of tuning the car for an octane level that isn’t reliably attainable.

More About The Uses Of Octane Boost

We asked AMSOIL Technical Services about the correct applications for their Octane Boost product. They don’t recommend this product for modern, stock automotive applications. In fact, AMSOIL Octane Boost is not compatible with catalytic converters. However, it is compatible with oxygen sensors. This octane additive was created for street-rods, classic cars, off-road and race track use.

AMSOIL tells us that there are three suitable approaches for using this product.

Boosting regular or mid-grade gasoline delivers the largest octane number increase. Again, when starting from higher octane levels, octane boost will offer less actual octane-number gains.

Another main use is starting with fuel which has the correct octane number for the application. Using this octane boost can provide extra insurance against engine knock and optimize performance.

Thirdly, AMSOIL Octane Boost can also be used as a lead supplement for classic cars.

Related: Octane Boost Myths And Facts 

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Is It OK To Replace 5W-20 With 0W-20 Motor Oil?

AMSOIL Signature Series Synthetic 0W-20 Motor Oil A reader asks: My car is supposed to use 5W-20 motor oil. I accidentally bought 0W-20 and did an oil change without noticing. Is it safe to continue running the 0W-20?

Our answer: In most cases, 0W-20 is a perfectly acceptable substitute for 5W-20. Both products are 20-weight motor oils at operating temperatures. However, the exception to using 0W-20 in your case may be if the vehicle is under warranty (see more below).

Actual Viscosity Comparison Of 5W-20 vs. 0W-20 Motor Oils

Let’s compare AMSOIL Signature Series Synthetic 0W-20 and 5W-20 by the numbers. The first specification is the viscosity measured at 100° C (212°F). This value is measured in “centistokes”. Both motor oils have a viscosity of 8.8 centistokes. What this tells us is that that at operating temperature, both products are all but identical.

  • 5W-20 8.8 cST
  • 0W-20 8.8 cST

Now let’s look at the viscosity number of each product measured at 40°C (104°F).  Not surprisingly, the 0W-20 has a slightly thinner viscosity at this temperature.

  • 5W-20 50.6 cST
  • 0W-20 47.1 cST

Below are the “cold-pour-point” temperatures for both the 0W-20 and 5W-20. This test determines the temperature at which the motor oil ceases to flow. Of course, the 0W-20 has a marginally lower pour-point than the 5W-20 in this test. But in real-world driving conditions, either product offers superb cold-flow protection. Both motor oils have cold-flow thresholds in the -60°F range.

  • 5W-20 -50°C (-58°F)
  • 0W-20 -53°C (-63°F)

Warranty Concerns?

When a newer vehicle is under warranty, a dealer may have cause for denying coverage when using a slightly different motor oil viscosity. The odds of this being a problem may very well be remote. But nevertheless, it is important to keep this in mind. Some may consider switching from the recommended 5W-20 to 0W-20 for improved cold-start protection. However, the cold-pour-point numbers shown above don’t point to a tangible advantage.

Conclusion

Using 0W-20 in place of 5W-20 is not completely uncommon. As a rule, we strongly urge customers to stick to the engine oil viscosity suggestion in their owner’s manual. However, substituting 0W-20 in place of 5W-20 in a pinch should not compromise engine protection.

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Which AMSOIL Bypass Filter System For Semi-Tractor Engine?

AMSOIL BMK30 Heavy-Duty Oil Bypass Filter System A reader asks: I am looking for a bit of advice on an oil bypass filter system. What is the difference between the AMSOIL BMK22-EA Dual Gard Bypass System and BMK30 Heavy-Duty Bypass System? This is for a highway tractor pulling super B’s. This unit would probably be logging about 95,000 miles (150,000 km) per year. We are looking to extend the oil change interval and lower engine wear.

Our answer: Of the two heavy-duty by-pass system options, the BMK30 Heavy-Duty System would be the better overall choice. The BMK30 delivers longer filter service life. It also has a lower initial cost and lower replacement element costs. This BMK30 is a much newer design than the BMK22. It was created as complete system for heavy-duty diesel engines.

Adding an oil by-pass system to your engine can certainly help to extend the time between oil changes. Bypass oil filtration offers vastly improved oil filtration. This reduces wear, extends oil change intervals and promotes longer engine life. The longer drain interval reduces service costs and creates less waste oil.

Both the BMK30 and BMK22 systems offer the same filtration function and efficiency. Here are the differences between the two systems.

BMK30 Heavy-Duty Bypass System
Capacity– For engines with sump capacity of 24-60 US quarts (22-57L)
Filter Change Interval– One year or 120,000 miles (193,000 KM) or one year or 1800 hours (whichever comes first)
Overall System Length– 17.5″
Oil Capacity Added– 1 US Gallon
System Cost*– About 27% less than total BMK22 cost. BMK30 system includes EABP120 filter element along with mount, fittings and hoses.
Filter Replacement Cost*– Requires a single EABP120 element. Replacement filter cost is about about 70% less than the BMK22 replacement elements.

BMK22 Dual Gard Bypass System
Capacity– For engines with sump capacity of 15-48 quarts (14-45L)
Filter Change Interval– Two years or 80,000 miles (129,000 km) or 1200 hours (whichever comes first)
Overall System Length– 13.5″
Oil Capacity Added– 1 US Gallon
BMK22 Cost*– About 27% more than BMK30 system cost. The two EABP110 elements are sold separately. System does include filter mount, hoses and fittings.
Filter Replacement Cost*– Requires two EABP110 elements. Replacement filter cost is about 70% more than replacing the single element for the BMK30.

*Regarding system and replacement filter prices. We are prohibited from publishing AMSOIL’s wholesale prices. Contact us using the form on this page for a wholesale price list.

About the only drawback for the BMK30 is that is about 4-inches longer than the BMK22. For the engine bay of a heavy-duty diesel, this should not be a significant drawback.

About Extending Oil Change Intervals

Bypass filtration removes most of the abrasive wear particles that regular full-flow oil filters just can’t touch. Regular oil filters remove particles down to between 15 to 25 microns. Bypass oil filters remove particles down the 1 to 2 micron range. Therefore, bypass filtration can extend engine oil life quite dramatically.

To determine exactly when to change oil, we suggest performing periodic used oil analysis. We can offer reasonably-priced oil analysis services. Oil analysis takes the guess-work out of deciding when to change the oil. The cost of oil analysis is much less than the cost associated with an oil change for a diesel engine. Oil analysis can also pick out issues such as fuel dilution or coolant incursion.

Looking For More Information And Prices On Bypass Systems?

Contact us using the form on this page or call us at 1-800-748-5781.

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When To Change CVT Fluid In Nissan Rogue?

AMSOIL Synthetic CVT Fluid A reader asks: I have to spend $4000 on a CVT transmission rebuild for my Nissan Rogue. I still owe $6000 on this car. The mechanic says the transmission failure happened because I never changed the fluid. How often should you change oil in a CVT transmission?

Our answer: CVT Fluid should be changed a lot more often than most people know. For most Nissan vehicles equipped with CVT transmissions, the fluid change interval is every 60,000 miles (96,000 km) or two years (whichever comes first).

For “severe service” operation, Nissan suggests changing the fluid at 30,000 miles (48,000 km) or two years (whichever comes first). Severe service can be defined as operation that creates very hot operating temperatures. This could be frequent towing or heavy-hauling, hill-climbing or operation in very hot climates.

For a list of CVT fluid change intervals for other car makers, see How Often Should CVT Fluid Be Changed?

Why Is It Important To Change CVT Fluid?

CVT transmissions are extremely hard on fluid. Normal CVT operation is rife with fluid shearing forces and extreme heat. Viscosity breakdown occurs over time and the fluid loses the suitable frictional properties. Once the CVT fluid breaks down, shuddering and poor operation starts to occur. At that point, transmission wear starts to spiral. It is certainly wise to change out the fluid before it starts to fail. Replacement of a CVT unit is very expensive. Therefore, regular CVT fluid changes don’t cost, they pay.

Why Use Synthetic Over Conventional CVT Fluid?

As mentioned, CVT transmissions routinely generate very hot operating temperatures. Hot temperatures accelerate the degradation of CVT fluid. Synthetic oils have a greater capacity to withstand extreme heat over conventional fluids. A high-quality synthetic CVT fluid can also actually lower operating temperatures.

We are certainly partial to AMSOIL Synthetic CVT Fluid. AMSOIL is a pioneer in synthetic transmission oil development. Our customers tell us that this product provides smooth, shudder-free performance. This AMSOIL CVT Fluid is a safe and dependable upgrade over factory CVT fluids. It covers most all of the popular CVT industry specifications.

Does A CVT Fluid Change Have To Be Performed By A Car Dealership?

Many competent car repair shops can perform a CVT fluid change. You do not necessarily have to go back to your car dealership to have this service performed. The main consideration is that the fluid being used is compatible with the industry specification required for your transmission.

Questions? Feel free to contact us using the form on this page or call us at 1-800-748-5781.

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Can You Switch From Synthetic To Conventional Oil In A Harley?

AMSOIL V-Twin Synthetic Primary Fluid A reader asks: A shop did some work on my Harley-Davidson and filled my primary with synthetic oil. I have always used regular H-D oil. Can I drain it and replace with regular oil? Will this cause any problems?

Our answer: You can safely drain the synthetic oil and go back to conventional oil (but read all the way down before you do). There will not be any problems whatsoever. Synthetic and conventional oil can be substituted back and forth without any compatibly issues or mechanical risks. This holds true for engine, primary chain case or transmission oils.

However, we suggest that you give the synthetic oil a try before draining it. You will likely notice that it is easier to find neutral. It is also likely that you will experience smoother clutch performance and cooler primary temperatures.

We are huge advocates of synthetics oils in Harley-Davidson motorcycles. Our customer feedback tells us about performance boosts in every imaginable category. We offer two synthetic options for Harley-Davidson primary chain cases. They are AMSOIL V-Twin Synthetic Primary Fluid or AMSOIL V-Twin Synthetic 20W-50 Motorcycle Oil. There is no wrong answer between the two products. Each offers identical performance and wear protection. Some like the idea of a dedicated primary fluid, while others like the idea of keeping just the 20W-50 on hand for engine, primary and transmission.

In conclusion, give the synthetic fluid a chance and determine if you experience any improvements. You can go back to conventional oil at any time in the future.

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Can Synthetic ATF Be Used In Older Cars?

AMSOIL OE Multi-Vehicle Synthetic ATF A common question is whether synthetic ATF can be used in classic cars? Yes, synthetic automatic transmission fluid is certainly compatible with older transmissions. It can provide a nice performance and protection upgrade.

Synthetic ATF will have similar viscosity and frictional properties to conventional ATF. Make sure to purchase an ATF meeting the correct specification for your transmission (more on that below).

The additive package of modern ATF (whether conventional or synthetic) will be significant upgrade over previous generations of ATF.

Factors To Consider Before Changing Automatic Transmission Fluid In Older Cars

  • When changing ATF in any transmission, consider if the transmission may have significant deposits. If the transmission fluid hasn’t been changed in several years, performing a flush would be a good idea. We offer the superb AMSOIL Engine and Transmission Flush for this very task.
  • Is the transmission original or rebuilt? Is it functioning properly?
  • Are the seals in good shape? Should any leaky seals be replaced at this point?
  • Replace the pan gasket and transmission filter during this process.

Does Synthetic ATF Cause Leaks?

This is a common misconception. Synthetic ATF does not cause leaks. In fact, good synthetics like AMSOIL will condition seals and extend their lifespan.

Conventional ATF may have a thicker viscosity in cooler temperatures. Synthetic ATF has a fairly consistent viscosity across the temperature spectrum. This difference could potentially lead to more drips on the garage floor through leaky seals. Therefore, this factor is what could fuel the “synthetic ATF causes leaks” myth.

How To Choose The Correct ATF For Classic Cars

See our article “How To Find The Right ATF For Older Cars”. Or check out our online application guide. If you still have questions, contact us using the form on this page. Put your question in the “Questions or Comments” section.

In conclusion, modern synthetic ATF products are perfectly compatible with mechanically sound older transmissions. In fact, they can improve transmission performance and maximize wear protection.

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How To Find The Right ATF For Older Cars

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AMSOIL Signature Series Multi-Vehicle Synthetic ATF If you are looking for an automatic transmission fluid for that classic car or truck, finding the correct ATF product may be confusing. Modern ATF labels likely do not list long-obsolete ATF specifications. But we can help. We carry a selection of ATF products that meet most all vintage ATF specifications for General Motors, Ford and Chrysler automatic transmissions. Contact us for pricing using the form on this page.

In this article, we will list obsolete ATF specifications from Chrysler, Ford and General Motors cars from the early 1950’s to the late 1990’s. We will also show the release year for each ATF spec along with a high-quality AMSOIL ATF replacement option that meets these older specs.

Related: Can Synthetic Automatic Transmission Fluid Be Used In Older Cars? 

AMSOIL Products For Obsolete ATF Specifications

AMSOIL Signature Series Multi-Vehicle Synthetic ATF– This is AMSOIL’s elite ATF formula. Designed to provide world-class heat, deposit and wear resistance. Offers smooth shifts and long-service life. Meets numerous vintage specs from Ford, Chrysler and GM.

AMSOIL OE Series Multi-Vehicle Synthetic ATF– Meets the same Ford, Chrysler and GM specifications as Signature Series Multi-Vehicle Synthetic ATF at a lower price point. Delivers an upgrade in performance and protection over regular ATF products.

AMSOIL Super Shift Synthetic Racing Transmission Fluid– Designed for Ford Type “F” applications. Provides exceptional wear protection and heat-fighting capabilities. Delivers the correct frictional properties for Ford transmissions that require Type “F” ATF.

Obsolete Chrysler/Dodge/Plymouth ATF Specifications

Chrysler borrowed GM ATF specs though the 50’s and into the mid-60’s. They released their own ATF standards starting in 1966.

Release YearChrysler ATF SpecificationsAMSOIL ATF Substitutes
1953GM Type “A”Signature Series or OE Series Multi-Vehicle Synthetic ATF
1957Type “A” Suffix “A”Signature Series or OE Series Multi-Vehicle Synthetic ATF
1966Type MS-3256Signature Series or OE Series Multi-Vehicle Synthetic ATF
1968Type MS-4228 Signature Series or OE Series Multi-Vehicle Synthetic ATF
1989ATF+ Type MS-7176Signature Series or OE Series Multi-Vehicle Synthetic ATF
1991ATF+2 Type MS-7176DSignature Series or OE Series Multi-Vehicle Synthetic ATF
1993ATF+3 Type MS-7176ESignature Series or OE Series Multi-Vehicle Synthetic ATF
1998ATF+4 Type MS-9602Signature Series or OE Series Multi-Vehicle Synthetic ATF

Obsolete Ford/Mercury/Lincoln/Edsel ATF Specifications

Ford took a different path than through the decades. The Ford Type “F” spec was introduced in 1967. Eventually Ford made the Type “F” specification the standard for most of their automatic transmissions backward to 1953 and up to 1979. The only exception being transmissions requiring the Ford Type “CJ” specification. Type “CJ” was used was in the mid-to-late 1970s and it does not use Type “F”. Ford Type “F” replaces Ford Type A (M2C33-A), Type “B” (M2C33-B), Ford Type “D” (M2C33-D) and Type “G” (M2C33-G).

Many ATF’s during the 1960’s and 1970’s had similar properties to GM Dexron. Ford Type “F” differed in that it did not contain friction modifiers. Therefore, this formula allowed shifting clutches to engage quickly.

Release YearFord ATF SpecificationsAMSOIL ATF Substitutes
1950GM Type “A”Signature Series or OE Series Multi-Vehicle Synthetic ATF to 1952. For 1953 and newer models, use Super Shift Racing Transmission Fluid (Type "F")
1959Ford Type "A" (M2C33-A)Super Shift Racing Transmission Fluid (Type "F")
1959Ford Type “B” (M2C33-B)Super Shift Racing Transmission Fluid (Type "F")
1960Ford Type “D” (M2C33-D)Super Shift Racing Transmission Fluid (Type "F")
1967Ford Type “F” (M2C33-F)Super Shift Racing Transmission Fluid (Type "F")
1972Ford Type “G” (M2C33-G)Super Shift Racing Transmission Fluid (Type "F")
1974Ford Type “CJ” (M2C138-CJ)Signature Series or OE Series Multi-Vehicle Synthetic ATF
1981Ford Type “H” (M2C166-H)Signature Series or OE Series Multi-Vehicle Synthetic ATF
1987Mercon (M2C185-A)Signature Series or OE Series Multi-Vehicle Synthetic ATF
1996Mercon V ATFSignature Series or OE Series Multi-Vehicle Synthetic ATF

Obsolete Chevrolet/Buick/Cadillac/Oldsmobile/Pontiac ATF Specifications

General Motors pioneered many automatic transmission technology concepts. They also lead the way with transmission fluid industry standards. All major manufacturers used the GM Type “A” fluid spec through the 1950’s. In fact, several Chrysler and Ford transmission fluids over the decades closely mimicked various iterations of the GM Dexron spec.

Release YearGM ATF SpecificationsAMSOIL ATF Substitutes
1949GM Type “A”Signature Series or OE Series Multi-Vehicle Synthetic ATF
1957GM Type “A” Suffix “A”Signature Series or OE Series Multi-Vehicle Synthetic ATF
1967Dexron (B)Signature Series or OE Series Multi-Vehicle Synthetic ATF
1973Dexron II (C)Signature Series or OE Series Multi-Vehicle Synthetic ATF
1975Dexron II (D)Signature Series or OE Series Multi-Vehicle Synthetic ATF
1990Dexron II (E)Signature Series or OE Series Multi-Vehicle Synthetic ATF
1993Dexron III (F)Signature Series or OE Series Multi-Vehicle Synthetic ATF
1998Dexron III (G)Signature Series or OE Series Multi-Vehicle Synthetic ATF

In conclusion, we’ve got high-quality ATF options for your classic automatic transmission. Contact us for a wholesale price list using the form on this page.

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Can You Use AMSOIL Dominator 2-Stroke Oil In An Outboard Motor?

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A reader asks: Is it OK to use AMSOIL Dominator 2-Stroke Racing Oil in my Johnson 15-horsepower outboard engine?

Our answer: No, AMSOIL Dominator would not be an appropriate choice for your outboard engine. AMSOIL has a few outstanding options for your outboard motors (see below). Dominator is a great oil for racing, but not suitable for outboard motors.

Dominator was developed for racing and/or heavily modified two-stroke engines only. This oil is designed to provide protection at exceptionally high operating temperatures. Therefore, even stock snowmobiles and dirt bikes may not run hot enough to completely burn the Dominator formula.

Also, AMSOIL did not add much in the way of detergents to Dominator. The reason for this is that racing engines are frequently torn down.

Therefore, a cool-running 2-stroke outboard engine could have two problems with running Dominator. First, outboards will not run anywhere near hot enough to completely burn the racing formulation. Second, Dominator does not offer detergents to clean up the resulting deposits from incomplete oil burning.

To sum up, the result of using Dominator in outboards could be significant deposit build-up and eventual operational problems. Dominator is a world-class racing oil. But it does not belong in an outboard engine.

Correct AMSOIL Two-Cycle Oil For Outboard Motors

AMSOIL Synthetic Two-Stroke Injector Oil is a versatile option for marine and dryland applications. It is superb as a premix in older outboard engines. It is also suitable as an injector oil. This full-synthetic oil can also be used in snowmobiles, personal watercraft and much more.

HP Marine Synthetic 2-Stroke Injector Oil is AMSOIL’s ultra-premium option for two-stroke marine applications. It can be used in the very latest 2-cycle engines (such as Evinrude E-TEC). HP Marine can also be used as a premix at 50:1. HP Marine delivers the ultimate in wear protection, deposit control and low-aquatic toxicity.

Saber Outboard is a premium synthetic product for outboard premix-only oil. Provides steadfast wear control, optimum throttle response and low-smoke in older outboard motors. Saber Outboard is sold in the USA only.

Questions? Contact us using the form on this page or call us at 1-800-748-5781. 

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Which Transmission Oil For KTM Dirt Bike?

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AMSOIL 10W-50 Synthetic Dirt Bike Oil

A reader asks: I have a 2017 KTM 300 EXC. The manual calls for 15W-50 oil in the transmission. I see that AMSOIL has the Metric Synthetic 15W-50 Motorcycle Oil and the Synthetic Dirt Bike Transmission Fluid. Which is the best option for me?

Our answer: We have a third option that we think would be the perfect transmission fluid for your 2-stroke KTM. That would be AMSOIL 10W-50 Synthetic Dirt Bike Oil. We’ll explain why below.

Let’s take AMSOIL Synthetic Dirt Bike Transmission Fluid off the table for your application. The Dirt Bike Transmission Fluid was designed for Japanese-brand dirt bike applications that require an SAE 80 oil. Keep in mind that gear oils use a different viscosity scale to prevent confusion with motor oil. An SAE 80 gear oil is actually the equivalent of 30-weight motor oil (in terms of actual viscosity). Your model requires a heavier 50-weight viscosity.

AMSOIL Metric Synthetic 15W-50 Motorcycle Oil would certainly perform and protect very well. There would not be any harm in using this product. Metric 15W-50 is designed to deliver smooth clutch engagement in street bike applications. Again, it will work, but the Dirt Bike 10W-50 is designed for off-road service.

An Ideal Transmission Oil For KTM Dirt Bikes

AMSOIL 10W-50 Synthetic Dirt Bike Oil was designed for dirt bike transmission service. It fights clutch fade by dissipating heat. This allows for maximum clutch plate preservation. It also provides instant clutch engagement in tight off-road situations. Dirt bike transmissions are commonly put under extreme loads in mud, deep sand and other extreme conditions. This aspect was a main focal point during product development.

AMSOIL Dirt Bike 10W-50 will also protect gears during rapid shifting. The 100% synthetic formula provides smooth, optimized shifting performance.

Replacing a 15W-50 with a 10W-50 is a non-issue. Keep in mind that at operating temperatures, both products are a 50-weight oil.

In conclusion, AMSOIL Dirt Bike Synthetic 10W-50 was designed to hold transmissions together under the rigors of professional motocross racing. Therefore, it will be the perfect upgrade for your bike too.

 

 

 

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How To Find Type A Automatic Transmission Fluid

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AMSOIL OE Multi-Vehicle Synthetic ATF

AMSOIL OE Multi-Vehicle Synthetic ATF Covers The Type A Spec

A reader asks: Does AMSOIL have a Type A ATF? I’ve got an older vehicle that requires a Type A automatic transmission fluid.

Our answer: We have two products that meet the Type “A” ATF specification. They are:

Type A ATF History And Compatibility

The Type A automatic transmission specification was created by General Motors in the late 1940’s.

Type A ATF was used in the automatic transmissions of every car maker on the market from 1949 to 1958. After that, other auto makers started to offer their own ATF specifications.

The “Type A, Suffix A” specification replaced Type “A” in the late 1950’s. Dexron “B” fluid later replaced Type A, Suffix A.

All iterations of Dexron B, Dexron II and Dexron III ATF products are backward compatible with Type A and Type A , Suffix A fluids.

Newer General Motors specs such as DEXRON VI, DEXRON HP and DEXRON ULV are NOT backward compatible with applications requiring a Type A ATF.

To sum up, to find a Type A ATF, simply look for an ATF that is compatible with the Dexron III specification. Dexron III ATF was specified  for General Motors vehicles until 2006. Therefore, it is commonly available. While the label may not list the old Type A spec, note that GM states that Dexron III is a suitable replacement for Type A.

Related: Can Synthetic Automatic Transmission Fluid Be Used In Older Cars?

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