I have built and raced NHRA stock motors, the high end go for broke racers, especially on a heads up race, will have oil heaters glued onto the oil pan(no dipstick heaters that I know of )and used them for 20 to 30 minutes before making the run. I have seen some of them pour ice water into the motors jst before pulling out of the staging lanes, they also soak the intake manifold with ice cold towels to get them as cold as they can I have dyno tested a bunch of pump gas and race gas motors, never saw a real differences in power using the thin oils(5W20 or 5W30 wt) in oil temps from 110 F to 210 F, similar results on water temps, no real power gains or losses from 110F to 180 F on N/A motors on a well tuned motor Manifold inlet temps do make a big difference in the same tests, cold (below 110 F) is way better