Your car engine needs oil. However, are some oils really better than others? Here's why Royal Purple oil has both a good and ...

3: Oil additives ($5 and up ... 5: Long-life antifreeze ($4-$8 per quart) Okay, some GM cars come factory-filled with five-year coolant, and we suggest that owners of these cars stay with it.

When did GM start using roller cams in production cars and trucks? I bought a nice, low-mileage 305 V8, 700-R4, 1986 1500 GMC, unmolested, from the original owner! Do I need to use a high-zinc ...