Hi all. I race a Honda Prelude dirt circle track car on the weekends. Car has a H22 NA 4 cylinder engine built by me making 210 whp. Engine has a solid DOHC valvetrain with a mile cam and valve springs.
Engine sees anywhere from 8500-9000 rpm twice a lap (at the end of the straights) and runs anywhere from 5 lap heats to 60 lap mains (with cautions). Coolant temp stays around 180-200f. Have been running amsoil dominator 10w-30 with great success but lately am getting tired of $60 oil changes. Is there a suitable off the shelf oil for my application, or should I suck it up and keep running what’s been working?
Engine sees anywhere from 8500-9000 rpm twice a lap (at the end of the straights) and runs anywhere from 5 lap heats to 60 lap mains (with cautions). Coolant temp stays around 180-200f. Have been running amsoil dominator 10w-30 with great success but lately am getting tired of $60 oil changes. Is there a suitable off the shelf oil for my application, or should I suck it up and keep running what’s been working?