Motor oil is the lifeblood of a car's engine, and if it's running low, it could lead to big problems. Here are five warning signs to watch for.

Oil is used to lubricate the moving parts of an engine in order to reduce the heat and wear produced by friction. Small ...

Oil is a crucial part of every internal combustion engine. Diesel and gasoline engines work differently, so is diesel engine ...

You're on a long drive, and you decide to check your oil when you pull into a gas station. It's a little low. Is it a bad ...

Best diesel engine oil: Shell Rotella T6 Full Synthetic Diesel: Synthetic: 1 gallon/5 gallon: $32-$274: Enlarge Image Pennzoil. ... Do not simply pour old motor oil down the drain.

CR shares five things to know about oil changes for your car, including when and how often to change the motor oil and whether your car needs synthetic oil. Ad-free. Influence-free.

Oil designed for a high rpm engine will have twice as many anti-foam additives in it than a diesel formula. Lastly, diesel oil contains significantly more detergent than gasoline engine oil.