Originally Posted by Kingtal0n

I like where you are going with this. As an example, use a redtop.

Take a redtop on the highway and repeatedly blast it to 100mph and back to 60mph. do it once. twice. three times. watch the coolant temperature start to rise. with me so far? keep on doing it. again and again and again. eventually the coolant temperature will rise enough to move the needle in the oem cluster.

Why? In part, due to the tiny turbine, yes. But also because the compressor is tiny and puts out alot of heat also. basically the tiny journal bearing turbocharger is not up to the challenge without some help from an oil cooler and an aftermarket radiator. Simple enough.

That guy bought the car to re-sell. I was trying to keep from flat out saying "he is abusing the vehicle on the highway that is why the gauge is moving" but now that hes actually sold it, I guess its ok to point that out.