Founded in 1954, STP became well-known after sponsoring successful racing teams. The brand offers two lines: Pro Performance conventional oil and SYN Full Synthetic oil. While STP makes excellent ...

STP has been making motor oil for decades. Yet, its motor oil products are limited to just two lines, namely its Pro Performance conventional oil and its SYN Full Synthetic oil, each available in ...

Kind of like the old Andy Granatelli TV ads for STP Oil Treatment ... Consider using synthetic gear lube. Larry Ludwig, chief chemist with Schaeffer Oil, says synthetic oils reduce gearcase ...