That's pretty on the money tbh, all trolling aside. Mine takes 15 minutes of a and b-roads to warm up, but mostly sits at 78* once it's there. That's bearing in mind both my glowplugs and coolant pre-heater are probably long dead tbf, but still. If i thrash all hell out of it for fifteen minutes straight it'll maybe see 85* lol, so to some extent the fmic will help it stay cooler. 