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t-stat results
Wow! Big improvement with the new t-stat. It warms up like a normal car now - the needle is off the peg within one km of a cold soak start, where before it took many, many kms. And that's with a 90% (manually adjustable) grille block.
I don't know if it's possible, but I'd bet the old t-stat failed gradually, because I remember that it WAS working when I got the car (I tested it in a pot on the stove). I would have noticed a change this dramatic. So I'm thinking I got used to progressively longer warm-up times, until I noticed recently that running the heater dropped the temp significantly (even on low fan speeds).
Coincidence that yesterday saw a record setting segment MPG (by about 2) on a well-travelled route? Probably, right?
Also new: The engine RPM behaves differently with the new t-stat. It's doing some rev-hang between gears that it didn't do before. So, probably past a coolant temp-sensitive programming threshold it wasn't reaching before.
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