I think there is some variation in thermostats, and many of them will put the car's operating temperature around 100 C. To the folks with cooler running cars, what kind of mpg are you getting? I get about 24-26 flogging it hard, and up to 30 if I'm easy on it.

I ask because I used to have an old Lincoln in which I ran 'stats from 160 to 180 F, and I lost a couple mpg with the cooler one. I also lost hot heat in the coldest part of winter, which is what prompted me to switch back to the hotter one.

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Whoever said there's nothing more expensive than a cheap Mercedes never had a cheap Jaguar.

83 300D Turbo with manual conversion, early W126 vented front rotors and H4 headlights 401,xxx miles
08 Suzuki GSX-R600 M4 Slip-on 26,xxx miles
88 Jaguar XJS V12 94,xxx miles. Work in progress.
99 Mazda Miata 183,xxx miles.