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Easy 5mpg gain in FE (due to switch to summer gas?)
Well my Aveo is finally living up to some of its FE ratings. My last two tanks have gone up from almost 32mpg average to almost 37mpg average. I've never had 37mpg in ANY tank so far.
So, what made the difference? Around this time of year, my area stops using oxygenated fuel.
I wonder if the benefit of using oxygenated fuel (OF) is still attained after you factor in the resulting loss in FE. As I understand it, OF was primarily meant to help emmisions on carburated engines. If this is true, I wonder if it is still necessary to use OF since the majority of cars are now using some form of TBI or EFI and the computer is watching emmissions via the 02 sensor.
Tommorrow I'll see if the MPG increase stays consistant while doing some heavy highway driving.
Any thoughts?
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