I'm not sure verse in oil so I was those who are more informed can make some recommendations.
Car is a 2015 WRX running E85 making 350/350 wheel. It is pretty much a track only car that occasionally gets driven around town. Originally I was using M12 ESP 5W30 but when the car started track duty I switched to Castrol Edge 5W40.
I'm in northern Cali, so the coldest it gets around here during winter might be the occasional mid 30s. The car likely won't get driven in that type of weather.
Oil temps can run up during track events, I've seen upwards of 260-270. While I know the oil can handle the temp I'm more concerned about viscosity and the resulting drop in oil pressure. I've been researching and it seems that switching back to 5W30 might cool down the motor and also free up some power, and that if it has strong film strength then the drop in pressure should be OK.
As a result, do you guys think I should move away from Castrol Edge 5W40? 20 bucks a jug is dirt cheaaaaaaap. Some of these racing oils are double the price. Like Ravenol Racing 5W40.
Stick to what I've been using?
Video of the car in action:
Pressures and temps are logged and overlayed to the video
Car is a 2015 WRX running E85 making 350/350 wheel. It is pretty much a track only car that occasionally gets driven around town. Originally I was using M12 ESP 5W30 but when the car started track duty I switched to Castrol Edge 5W40.
I'm in northern Cali, so the coldest it gets around here during winter might be the occasional mid 30s. The car likely won't get driven in that type of weather.
Oil temps can run up during track events, I've seen upwards of 260-270. While I know the oil can handle the temp I'm more concerned about viscosity and the resulting drop in oil pressure. I've been researching and it seems that switching back to 5W30 might cool down the motor and also free up some power, and that if it has strong film strength then the drop in pressure should be OK.
As a result, do you guys think I should move away from Castrol Edge 5W40? 20 bucks a jug is dirt cheaaaaaaap. Some of these racing oils are double the price. Like Ravenol Racing 5W40.
Stick to what I've been using?
Video of the car in action:
Pressures and temps are logged and overlayed to the video