Every engine requires oil to function, though oil itself has changed a lot over the decades. It's no longer a bad idea to use ...

Synthetic oil is fundamentally different from its conventional counterpart. It's artificially manufactured to have the optimal properties for the grade in question, which means it doesn't need ...

Synthetic oil, he says, has additives that allow drivers to stretch the miles and time between their oil changes. “Conventional oil lasts about 3,000 miles or three months,” the mechanic says ...

Synthetic oil is a go-to choice for many vehicle owners, but does it improve fuel economy? If better mpg is your goal, here's ...

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 ...

Synthetic oil can also be good for older cars because it’s less likely than conventional oil to “sludge”—or form a gunky residue when it breaks down. Sludge can block oil passages and lead ...

A popular suggestion by service stations and mechanics is to change the motor oil every 3,000 miles in the case of conventional engine oil, and maybe double that for synthetic. With conventional ...

Valvoline Advanced Full Synthetic Motor Oil – $26.97 (25% off) $26.97 at Amazon. Valvoline prides itself on being the original motor oil, and it’s pretty difficult to dispute this claim.

“The big difference is that synthetic oil tends to last longer than conventional oil between changes—up to 10,000 miles or more,” Ibbotson says.