High mileage oil sits in the same aisle as conventional and synthetic, but it promises something different: extra protection for engines that have already lived a long, hard life. I want to unpack ...

We may receive a commission on purchases made from links. If your vehicle is due for an oil change, the oil of choice is either synthetic or conventional motor oil. But if your car's odometer is over ...

Under normal circumstances, most modern engine oil and gasoline brands work fine on their own to keep your engine running smoothly. But there may be cases where even the best of them could use a ...

Think your car is still in its youth? By oil manufacturers' definitions, it may already be "high mileage." But what does that mean?

Motor oils are broadly categorized into fully synthetic, conventional, and synthetic blends (also called semi-synthetic or part synthetic), with semi-conventional and high-mileage full synthetics ...

Yes, synthetic oil is better for most engines, offering superior protection, longer life, and performance compared to conventional oils.

Jeff Smith of Roadkill Garage pours in some Castrol Edge High Mileage oil into a 318 engine that could use it.

My car is 8-years old and has about 165k km on the odometer. I got the car when it had about 100k km and I've been taking it to a local shop for oil changes ever since. (I bought a lifetime oil change ...

I’ve been getting a lot of mail regarding using synthetic motor oil in vehicles. Questions such as: Should I use synthetic oil? Does it work better in some cars than others? Does it cost more? Do I ...