Oil Water and temperature Racers know the less friction in the engine the cooler it runs and the cooler the better in performance. My 95 vette as do all c4s ran hot especially in traffic. I know already that synthetic oil will lower the temp 5-10 degrees especially under load. In addition I added problend to my oil which my drag racing buddie swears by. It lowered my oil temp 15 deg. I added -40 degree additive to my radiator with a 160 deg hypertech thermostat and got my water temp to 210 deg in heavy stop and go traffic vs 229 deg without it. I use problend in all my cars.
