The number preceding the "W" is the "winter weight". I'm not sure how they compute it, or what it stands for, but basically, a "5W-XX" can be pumped by your engine at a lower temperature than a ...
Chevron's testing features its Delo 400 LE SAE 10W-30 engine oil. In addition to the 1 percent fuel economy improvement over 15W-40 oils, testing found it offered a 0.5 percent savings over 5W-40 ...
Synthetic oils have caused countless debates and confusion across nearly every automotive forum, and often with good reason. Legally, the term “synthetic” has a pretty loose definition. While some ...
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