AMSOIL 0W-20 Versus Mobil 1 0W-20Can Mobil 1 Advanced Fuel Economy 0W-20 Synthetic Motor Oil improve gas mileage? Let’s also analyze how this product compares to AMSOIL Signature Series Synthetic 0W-20 Motor Oil.

In recent months, you may have seen television commercials featuring Mobil 1 Advanced Fuel Economy 0W-20 Synthetic Motor Oil. Mobil advertisements make claims that this product can improve fuel mileage by up to 2.3%. While this claim sounds intriguing, when one delves into the fine print in Mobil’s literature, there are details that can’t be communicated during a 30 second television spot.

The fine print tells us that these fuel economy gains are achieved when switching from heavier viscosity motor oils to the lighter synthetic 0W-20. From

Helps improve fuel economy based on 0.2-2.3% potential fuel economy improvement obtained by switching from higher viscosity oils to a 0W-20 grade. Actual savings are dependent upon vehicle/engine type, outside temperature, driving conditions and your current engine oil viscosity.

Mobil doesn’t offer particulars about what exactly these “higher viscosity oils” may be. Could they be 5W-30, possibly heavier? Were the baseline engine oils conventional or synthetic? Switching from a lower quality conventional 5W-30, 10W-30 (or perhaps even 40-weight) motor oil to a synthetic 0W-20 is bound to provide gas mileage gains. So while we will not question the quality of their product, Mobil’s fuel economy improvement claims in this context are a tad dubious.

This leads to another question. Why would someone switch from a heavier viscosity motor oil to a 0W-20? If your car’s owner’s manual suggests 5W-30, do not switch to 0W-20 for minuscule fuel economy gains. If your car is designed for 5W-30 engine oil, stick with it for proper wear protection. However, if your car or truck calls for 5W-20 motor, 0W-20 can be an acceptable replacement. Do not expect fuel economy gains when switching from 5W-20 to a 0W-20. They are both 20-weight oils at operating temperature, so there are no frictional advantages. The 0W-20 may offer very modest cold weather flow improvements (in some cases). The best option is to simply use the viscosity suggested by your owner’s manual.

Comparing AMSOIL Signature Series 0W-20 With Mobil 1 0W-20

While we haven’t performed any scientific lab or field tests with these two products, as we show below, much can be learned from the numbers published by AMSOIL and Mobil. In past comparative lab testing, AMSOIL Signature Series Synthetic formulas have dominated Mobil 1’s best offerings.

Cold Pour Point

  • AMSOIL Signature Series 0W-20 -53°C
  • Mobil 1 Advanced Fuel Economy Synthetic 0W-20 -48°C

Using the ASTM D97 testing protocol, motor oil is cooled to the point where it starts to congeal. AMSOIL Signature Series Synthetic 0W-20 Motor Oil has a moderate edge over Mobil 1 Advanced Fuel Economy 0W-20 Synthetic Motor Oil when it comes to cold start protection.

Total Base Number

  • AMSOIL Signature Series 0W-20 12.6
  • Mobil 1 Advanced Fuel Economy Synthetic 0W-20 8.8

Total Base Number (TBN) is a critical spec that measures a motor oil’s capacity to neutralize acids. When analyzing motor oils, this is where the men are separated from the boys. The potent AMSOIL Signature Series 0W-20 formula has a TBN of 12.6, which is about a strong as they come in passenger car motor oils. Mobil 1 Advanced Fuel Economy 0W-20 has a rather tame TBN of just 8.8. In simple terms, AMSOIL Signature Series 0W-20 has a far greater reserve alkalinity and a superior ability to protect engine parts from acids and combustion by-products. This implies that AMSOIL has formulated their 0W-20 with a far stronger additive package than Mobil has with their 0W-20.

Oil Change Interval

AMSOIL Signature Series 0W-20- Up to 40,000 km (25,000 miles) or one year.
Mobil 1 Advanced Fuel Economy Synthetic 0W-20- Change at interval as suggested by owner’s manual.

When examining the drain intervals between these two products, it becomes apparent that TBN is not the only stark difference between the two. Mobil 1 Advanced Fuel Economy 0W-20 is not recommended for extended oil change intervals and this could be partially attributed to its low TBN. AMSOIL Signature Series 0W-20 can stay in service for up to or one year. For severe service use, AMSOIL 0W-20 can still go for 24,000 km (15,000 miles) or one year.

Even if you do not intend to employ extended periods between oil changes with the AMSOIL product, it is still nice to know that your engine oil is “overbuilt” enough to protect over long periods and big miles.

Cost of Mobil 1 0W-20 Versus AMSOIL Signature Series 0W-20

The suggested retail price of Mobil 1 Advanced Fuel Economy 0W-20 Synthetic Motor Oil is about 35% greater than AMSOIL Signature Series Synthetic 0W-20 Motor Oil when employing our wholesale programs and buying “by the case”. In most cases you can have AMSOIL’s best synthetic 0W-20 shipped to your door for less than you would pay for Mobil 0W-20 at major retail outlets.

Contact us for a wholesale price list using the form on this page or call us at 1-800-748-5781 for more details.

We’re a little concerned that one of our customers might have a speed addiction problem. A couple of weeks ago, Trevor sent us pictures of his Dodge Charger Hellcat. At 707 horsepower, that is one angry car. If that wasn’t bad enough, he then passed pictures of his 2016 Polaris Rush 800 Pro-X snowmobile. While this Polaris looks like your average modern snowmobile, it is actually even more berserk than the Hellcat.

The Rush 800 Pro-X is equipped with the 800cc Cleanfire H.O. engine. Conservative estimates rate this engine at around 160 horsepower. For fun, let’s do a bit of math. With a dry weight of just 435 pounds, the Rush 800 Pro-X offers 0.368 horsepower per pound. The Charger Hellcat weighs 4560 pounds and puts down 707 horsepower, so it has 0.155 horsepower per pound of weight. Therefore the Polaris has a horsepower to weight ratio that is 140% greater than that of the Hellcat! One can assume that Trevor sports a mile-wide grin anytime he’s out on the trails.

The Rush 800 Pro-X is Polaris’s most serious machine for cross country, rough trails and ditch banging. Aside from the big power, it has Polaris’s advanced AXYS chassis and the long-travel Pro-XC suspension. The suspension has Walker Evans shocks at both ends. This sled is built to take very heavy hits at high speed. The 120” X 1.75” track allows for serious cross country work or surgical navigation of tight trails.

Once this unit is broken-in, Trevor intends to use our AMSOIL Interceptor Synthetic 2-Stroke Oil in this machine. This is a very wise choice. Interceptor delivers world-class protection for big horsepower 2-stroke engines, while reducing friction to maximize power output. Also consider that this engine is equipped with 3-Stage Electronically-Controlled Variable Exhaust Power Valves. For proper performance, these power valves have to stay free of carbon deposits. Interceptor is legendary for its ability to keep exhaust power valves kitchen-clean, further making Interceptor a brilliant choice. All in all, AMSOIL Interceptor is a perfect match for the Polaris Rush 800 Pro-X and a great upgrade over Polaris VES Synthetic 2-Stroke Oil.

What were the best selling motor oil viscosities last year?

If you’re wondering if 5W-30 motor oil still outsells 5W-20 in gasoline-powered vehicles or if 15W-40 diesel oil is still relevant, we’ve compiled our sales number for the past year. Let’s examine the market share for each viscosity grade in the categories listed below. Plus we’ll list our top 15 best selling motor oil products of the last year.

  • Passenger Car/Light Truck/Gasoline Engine Oils
  • Diesel Engine Oils
  • European Formula Engine Oils

Please keep in mind that this data is based on our sales and may not necessarily reflect the motor oil market as a whole.

The Most Popular Engine Oil Grades For Passenger Car/Light Truck/Gasoline Engines

While 5W-30 is still the most popular viscosity, 5W-20 and 0W-20 are quickly gaining ground. Compared to last year’s numbers, 5W-30 has lost roughly 7 percentage points, while 5W-20 gained a single percentage point and 0W-20 gained about 4 points. We’re seeing 0W-20 being recommended for more vehicles every year. Note that when the numbers are combined, 0W-20 and 5W-20 are commanding more market share than 5W-30 overall. As car manufacturers are turning to lighter engine oils for fuel economy gains, expect 5W-30 to be specified in fewer new vehicles going forward. In fact, if industry rumblings are correct, we could see 0W-16 engine oils being specified for new cars in the next year or two.

Graph of Motor Oil Grade Sales 2015

The Best Selling Diesel Engine Oil Viscosity Grades

The classic 15W-40 diesel engine oil grade still put up very strong sales numbers in 2015. This was based on the sales of three different 15W-40 products in our line-up. The versatile 5W-40 diesel grade took almost 40% of sales based on the strength of “DEO” Premium 5W-40. This full synthetic 5W-40 is a great choice for year-round use in most diesel applications.

Graph Of Diesel Engine Oil Visocosity Popularity 2015

The Best Selling European Formula Engine Oil Types

Mid-SAPS 5W-40 still outsells Low-SAPS 5W-30 by a significant margin, while Full-SAPS 5W-40 sales are still very strong. Here is an explanation of the proper applications for each European engine oil type.

Graph of European Motor Oil Viscosity Sales 2015

Top Selling AMSOIL Motor Oils At In 2015

  1. (XLF) XL 5W-30 Synthetic Motor Oil
  2. (XLM) XL 5W-20 Synthetic Motor Oil
  3. (DEO) Premium 5W-40 Synthetic Diesel Motor Oil
  4. (ASL) Signature Series 5W-30 Synthetic Motor Oil
  5. (DME) Premium 15W-40 Synthetic Diesel Motor Oil
  6. (ALM) Signature Series 5W-20 Synthetic Motor Oil
  7. (AFL) 5W-40 European Improved ESP Synthetic Motor Oil
  8. (AEL) 5W-30 European Improved ESP Synthetic Motor Oil
  9. (OEM) OE 5W-20 Synthetic Motor Oil
  10. (OEF) OE 5W-30 Synthetic Motor Oil
  11. (ASM) Signature Series 5W-20 Synthetic Motor Oil
  12. (AME) 15W-40 Heavy-Duty Synthetic Diesel and Marine Motor Oil
  13. (AZO) Signature Series 0W-30 Synthetic Motor Oil
  14. (OED) OE 15W-40 Synthetic Diesel Motor Oil)
  15. (OEZ) OE 0W-20 Synthetic Motor Oil

When Trevor was searching for the best engine oil for his new Dodge Charger Hellcat SRT, he found that there were not a lot of choices on the market. As the Hellcat’s supercharged 6.2L V-8 engine puts out 707 horsepower and 650 lb.-ft. of torque, ordinary motor oil simply would not do. The proper candidate also had to meet the Chrysler/Mopar MS-12633 specification for SRT engines.

Trevor contacted us and ultimately settled on AMSOIL Signature Series 0W-40 Synthetic Oil. This 100% synthetic 0W-40 was designed for the Dodge/Chrysler MS-12633, MS-10725 and MS-10850 specifications. This motor oil was engineered from the ground-up with the mega-horsepower rigors of Dodge SRT engines in mind. If there’s one upgrade SRT Hemi owners should make, this is it.

Trevor also purchased the first-rate AMSOIL EAO-11 oil filter for his Hellcat. AMSOIL EAO filters boast ultra-durable construction and industry-leading particle removal. We are confident that there likely isn’t a better oil/filter combination for Hellcat engines on the planet.

Trevor was kind enough to share pictures of his gorgeous Charger Hellcat. Enjoy!