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Old 06-02-2009   #26
secondchance
 
Join Date: Aug 2006
Location: McLean, VA
Posts: 3,732
Default Re: Correct engine coolant temperature

Jim,

I replicated and confirmed that my Z with OEM thermostat does the same thing.
Sustained 55-60 mph in 6th - 213
Down shift to 5th, temp drops to 202
Sustained 65 in 6th - 208

Ambient temp was around 84.

Generally I prefer not lug the motor so I don't get into 6th unless I am running sustained 70 plus. That's probably I was never aware of this.
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