Quote:
Originally Posted by Juho
Noticed a few days ago it took quite long time to reach the half way of temperature gauge, and engine temperature sensor tells maximum temperature is only 85C.. should go up to 104C if oil hasn't warmed up before that to around 95C.
That doesn't do any good for fuel economy, and won't allow me to see how much I could raise the intake air temperature by raising coolant temperature (about 96-98C while cruising, maybe higher).
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No wonder the dedicated-ethanol cars from the '80s and '90s had an auxiliary gasoline tank for cold start, and some also had a thermostatic control to the air intake in order to decrease warmup times. Thermostatic valves set to open at a higher temperature and intake manifolds heated by the engine coolant used to be a common feature back in the day when carburettors were the norm.