In many cases, it is possible to move down one oil weight (from 20W-50 to 10W-40) when switching to a fully synthetic product. The rule of thumb is to start with 10W-30 motor oil for crate engines ...

I just changed the oil in my Nissan Pao last week, and in doing so I was warned—several times—that my plan to replace the conventional oil in my car with synthetic was a terrible idea. But you ...

Oil Weights Explained. 10W-30, 15W-40, 20W-50. ... All with the very same spec of oil pumping through the engine. Synthetic versus Conventional Oil. Oil is also classified by its makeup, ...

One Harley Davidson Forums contributor claimed that Red Line 20W-50 was the best synthetic engine oil on the market because it contains Molybdenum.

Best synthetic engine oil runner-up: Amsoil Signature Series Synthetic: Synthetic: 1 quart/1 gallon: $15-$58: Best cheap synthetic engine oil: Valvoline Advanced Full Synthetic: Synthetic: ...

Consumer Reports presents the advantages and downsides of using synthetic oil in your car, and why you might want to consider synthetic engine oil. Ad-free. Influence-free.

Synthetic Motor Oil Pricing Nearly all general-use synthetic oils, whether purchased online or in-store, can be snagged for roughly $10 to $15 per quart or between $25 to $40 per one gallon or ...

If you have to mix conventional oils and synthetics, or if you use a bottle of synthetic oil to top off a particularly hungry engine, you're not going to do any damage to your engine.Not in the ...

According to AAA, most automakers now recommend oil change intervals between 5,000 and 7,500 miles for vehicles using conventional oil. If your car requires full-synthetic motor oil, that range ...

On old, low-compression, high-mileage engines, I tend to like to use thicker oils, and, in the case of my air-cooled Beetle, where the oil does a lot of cooling work as well, I've used 20W-50 oil ...

One Harley Davidson Forums contributor claimed that Red Line 20W-50 was the best synthetic engine oil on the market because it contains Molybdenum.