The numbers and letters on a bottle of motor oil can look like gibberish if you aren't sure how to decode them. 5W-30, 10W-40, 0W-20... What's this supposed to be telling you? Does the "W" stand for ...
Over the past 40-plus years, I have changed the oil in more engines than I can begin to count. If you're about to change the oil in your car yourself, consult the owner's manual that came with your ...