Terry, being from OZ I work in oC so 240F = 115C.

Now we have many vehicles over here that operate at 103C (217.4F)- normally.

Add approx. 6C for an antifreeze/anti boil coolant at 50/50 and we are up to a boiling point of 109C

Add 12C for each 50kPa (7 ... Login to read more.