Internal combustion engines need the correct oil level to run harmoniously. Too much or too little oil could harm engine longevity and performance. For instance, continuously driving with an engine ...

Q: My 2020 Subaru Impreza was recently serviced at the dealer. The service person installed 6 quarts of oil. According to the manual, there should have been only 5 quarts of oil. The oil level on the ...

Brian Cooley is CNET's Editor at large and has been with the brand since 1995. He currently focuses on electrification of vehicles but also follows the big trends in smart home, digital healthcare, 5G ...

The oil in your vehicle’s engine is pretty incredible. Its job is to protect every square inch inside your engine where there is metal-to-metal contact – your piston rings, cylinder walls, valves, ...