Beth Skwarecki is Lifehacker’s Senior Health Editor, and holds certifications as a personal trainer and weightlifting coach. She has been writing about health for over 10 years. Running more miles ...

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 ...

DETROIT (AP) — Highway gas mileage estimates for about one-third of all new vehicles sold in the U.S. will fall by one mile per gallon because the government has changed the way it calculates the ...

Choosing between full synthetic and high-mileage oil isn't about chasing the perfect product. It's about understanding what your engine actually needs at its current point in life. As engines rack up ...