Quote:
Originally Posted by i_am_socket
It's definitely both. It helps keep the engine warmer and help it warm up faster after a cold start and it helps aerodynamically by keeping the air from having to push through that mess of engine parts under the hood. It won't really keep the incoming air warmer, though. That's up to mother nature.
What kind of driving are you doing in that truck (local, highway, hauling) ?
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Mostly I commute to work about 20 miles, it's mostly rural streets, some long runs but also some lights and stops sign area's average about 30 mph. I have been doing my best to "Drive W/O Brakes" and saw my FE go from about 13.8 to 15.0 mpg on this commute. It is getting colder now and I usually see my FE go down in winter. I was thinking the quilted covers they sell may help warm the engine quicker and maybe provide aero effects. I'm going to plug it in this winter too instead of idling to warm up.