Let’s explain all of those confusing numbers, letters and terms to help you choose the right oil for your car.

Read more: 10 Best Motor Oil Brands, Ranked The first major difference between diesel engine oil and conventional oil is the ...

Newer automotive gasoline engines require the use of SAE 5W-30, 5W-20 or 0W-20 passenger car motor oil (PCMO) grades, dependent on manufacturer recommendations.” In addition, diesel engine oil ...

In the past, motor oil had, as Derek Bieri likes to say, "All the vitamins and minerals old engines need." Over the years, however, engines and emissions standards changed and motor oils changed ...