There actually is not a catalyitic converter thermometer. Its temperature in
inferred by the ambient temperature ( via air intake sensor ) and cylinder head temperature sensor. There is no actual water temperature sensor. This is also inferred from the cylinder head temperature.
If the head temperature is t, and the ambient temperture is x, then it is very predictable that the water temperature is y, and the catalyist temperature is z.
It DOES help fuel economy and readiness to go EV to have engine block temperature warmer when you start your day.
P.S. 50/50 antifreeze is good down to -35'F. 70/30 is good for like -55'F.
Quote:
Originally Posted by jmorton10
An engine block heater is not going to prevent the engine running on a cold morning because it has to run anyway to heat the catalytic converter to operating temps.
This Winter in upstate NY we had a really cold spell where it literally stayed at about 2º for a week at a time. My mpg dropped as low as its ever gotten during that time & the gas engine rarely if ever shut off at all.
If the engine did manage to turn off(& some days it never shut off at all), it started right back up again 30 seconds later.
~John
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