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A reader asks: I’m concerned that I my engine may have a leaky head gasket. Can oil and coolant analysis tell me if there is a head gasket problem? Would I need to test for traces of ethylene glycol in the oil and for engine oil in the coolant? Our answer: If you suspect that…
A reader asks: Do I need to use a special oil filter with synthetic motor oil? I see that there are “synthetic” oil filters available. What is the difference between a synthetic oil filter and a regular oil filter? Our answer: You do not need to use a synthetic oil filter with synthetic engine oil….
A reader asks: 0W-20 motor oil is suggested for my car. Should I use 5W-30 instead? Will 5W-30 protect my engine better than 0W-20? Our answer: It is a commonly held belief that 0W-20 engine oil is somehow deficient and that using a thicker viscosity will be beneficial. However, the idea that using a thicker…
A reader asks: I’ve got a question about AMSOIL P.i. Gasoline Additive. My car is a Honda Fit and the fuel tank only holds 10.6 gallons (40 L). The P.i. label directions suggests that the bottle can treat up to 30 gallons (113 L). Should I only pour in 1/3 of the bottle or the…
In July 2025, Nissan announced a recall on almost half a million Nissan Rogues and Altimas, along with Infiniti QX50 and QX55 models. This recall concerns defective bearings in 1.5L and 2.0L engines. Nissan technicians will remove the oil pan and inspect for metal particles. We submit that an inexpensive used oil analysis report can…
Here are solutions to counteract the ethanol now added to premium gasoline. Premium gasoline is no longer ethanol-free in most Canada locations. At least 10% ethanol content is now mandated for the vast majority of premium gasoline on the market. Until recently, premium grade gasoline was without ethanol at many Canadian pumps. For those looking…
The soap/detergent injector on our Karcher pressure washer quit working a couple of years ago. The pressure washer itself works great. We tried to trouble-shoot it. Tried to disassemble it. Attempted to blow out the lines with compressed air. No luck. But there is a solution. Abandon your pressure washer’s detergent injector. Just give up?…
Updated- December, 2024 Did your lawn mower start just fine last fall, but would not start (or operated poorly) when you went to use it this spring? This is more than likely due to stale gasoline. This issue extremely common. In fact, it keeps small engine repair shops in business. There is an easy and…
Let’s see how Sea Foam Motor Treatment stacks up against AMSOIL Gasoline Stabilizer for preserving fuel and preventing rust and corrosion. Sea Foam Motor Treatment is a very popular fuel and oil treatment. In fact, Sea Foam could be considered a household name for those inclined to have a bit of grease under their fingernails….
A reader asks: I’ve got a 2018 RAM 3500 with the 6.7L Cummins diesel engine. Your application guide shows that the WIX WF10255NP fuel filter is suitable for my engine. However, the bottom of the WIX part looks completely different from the stock Mopar fuel filter (part # 68157291AA). The Mopar filter has an oval…
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