I thought more antifreeze = less temp.. I would like to know more about this 20-30% mix for summer use. Dan Kraus :-) also, use a 20-30% antifreeze mix. the closer to 50/50 you get, the hotter > it will run (as well as oil temps). i took the rieger from 110c oil temp at > 50/50 mix to low 100c at 25/75 mix. as long as