Quote:
Originally Posted by SDMCF
With you it is always summer!
Seriously though, why do you lose MPG in summer? Air con? What else?
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It's pretty much a double whammy of using the A/C. I drive only city miles and here diesel are still sold without DPF's (until late this year) and our best/2nd best seller is the Toyota Hilux, so I always have the fan on recycle, it doesn't take a very hot day to need the A/C. When it's 35*C+ the A/C takes a lot of power but also means I can't EOC or engine off at lights etc, on a 40+ day it can mean a 20% fuel economy hit.
One of the reasons I bought a Prius is because the A/C runs off the HV battery, so the A/C hit is very, very small. I haven't had it that long, but I've found that improved warm up in hot weather roughly equals the added energy use of A/C.