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Originally Posted by coolhand297
I have the parts on order to fix the Tstat and a few other cooling system items which I want to change out just for preventive maintenance.
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With a bunch of friends, I once rented 2 vans, one of which had the Tstat malfunctioning, and it'd permanently run as if it was cold.
The difference is fuel use was huge.
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As for the Carbon hood it was already sold, shed about 10 pounds off the car from the metal hood, definitely not cost effective. And no measurable difference in MPG's.
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You'd need to shed a lot more weight for it to show up in mixed driving.
But it can't hurt to do so
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The 3 pedal mod is definitely cost effective, just in future maintenance it will almost pay for it self. Since I got it with the taller final drive it makes all the gears longer not just 5th.
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If you ever need to swap the gearbox oil - you probably just did - VW apparently has some quality lightweight tranny oil that brings down fuel use as well.
Another fringe benefit, along with lightweight engine oil, but it seems to be helping me.