|
Well its not necessarly the heat that hurts the mpg, but the nut behind the wheel that uses the ac. The ac really eats into your mpg on an eco modded hybrid of any make. I see a good 15 mpg reduction. Then with the high compression engine the newer insight has with its dual ignition system IDSI system it starts toretard the engine once it gets over 186-190 degrees and lowers the cvt ratio. With or without a grill block, when it exceeds 100 degrees its pushing 200 at the engine when its engaged. When its pushing 100 degrees outside, the IMA system takes it easy as its at its upper operating temperature.
In my experience the Insight likes 90 degres with 100% humidity for best mpg. Using mid grade gas helps hold the timing and cvt ration higher, but its not cost effected for the bump in price between fuels. So far sheetz is the worse, BP is the best in how the Insight behaves. When it has bad gas, it retards the hell out of the valves and plugs and you end up with what sounds like a gutless throaty rice vehicle.
|