Quote:
Originally Posted by oil pan 4
It will cause the exhaust pipe to oxidize faster. It will "rust" faster but not because of water.
Don't bother with it unless you have stainless exhaust or a diesel.
I don't think it will help fuel economy.
If you want to do something with the exhaust on a gasoline engine to boost fuel economy the only thing I can think of is add an exhaust/coolant heat exchanger.
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The G1 Insight comes with a heat exchanger from the factory.
Anyway, thanks! I'll scratch that idea off the list.