Oxidation, fuel dilution, copper, lead, potassium, aluminum, iron and so much more. Used engine oil analysis not only reveals elements and conditions that can help fleets maximize oil life, it also ...

Here’s a news update that should concern all automotive enthusiasts: the general engine oil landscape is evolving again, and as we explore the nuances of this new chemistry you will see that it is ...

CCJ's 10 44 is brought to you by Chevron Delo, heavy duty diesel engine oil. Now there's even more reasons to choose Delo. An oil sample is only as good as the method used to pull it. You're watching ...

Being able to verify the quality of lubricants is crucial for ensuring engine functionality. Credit: 3d_illustrator via Shutterstock. Lubricants and coolants are critical in engines to minimise the ...

Oil and fluid testing answers both short- and long-term questions about the internal condition of engines, transmissions and hydraulic systems. A one-time sample of engine or transmission oil gives a ...

Here are 2025's most popular questions and answers from The Journal's Car Doctor column, from rotating tires to oil changes.

The oil you put in your engine matters. After all, your engine contains many moving parts that must remain lubricated to work properly. Otherwise, your engine could develop some serious wear and tear.

To understand how overfilling your engine oil is too much of a good thing, it’s helpful to provide a little background. Engines are comprised of hundreds of precision-crafted parts working in unison ...

Diesel and gasoline engines might look alike under the hood, but they use oil in very different ways. Gas engines run cleaner, but diesels create much more soot, crank out higher compression forces, ...

Toyota warranty issues have highlighted at least two engine failures in the GR86 sports car, which is closely related to the Subaru BRZ and powered by the Subaru FA24D four-cylinder engine. Owners ...