I drive a 2005 Silverado and I was wondering what effect the mirrors have. For the last tank I ran I folded in the right side mirror. I saw slightly better than a half MPG increase when I filled up and that was even using the A/C on one hot day.
I have no idea. a truck like that isn't gonna notice much from small aero changes. (such terrible aero to start with and a big engine to ignore it, even the v6) 1/2 mpg variation in one tank is well below most peoples standard deviation.
1991 Toyota Pickup 22R-E 2.4 I4/5 speed
1990 Toyota Cressida 7M-GE 3.0 I6/5-speed manual
mechanic, carpenter, stagehand, rigger, and know-it-all smartass
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