During races, I put a one gallon container of 50/50 water meth in a bracket where the passenger seat use to be that has a wiper fluid pump attached to the side. A small hoses runs to the front bumper where several small misters spray directly onto the oil and transmission cooler, any extra goes to the radiator. I don't have data on how much extra cooling this provides, but I never had any issues on a 110 degree day during 20 minute sessions. I would flip the switch on straightaways and leave it on for a full lap like every three or four laps. $10 invested. I would recommend trying it.