LogFAQs > #967764370

It really depends on how long you want to keep your car. If you buy a new car, or a new used car, on a regular basis, you might as well buy dino oil. If you like your car and want to keep it a long time, or you drive a classic like I do (95 Caprice), then the full synthetic will keep your engine in pristine condition for much longer.

Or you can split the difference and get semi-synthetic. It's better than dino, but less expensive then full synth.