Gas Mileage With a Punch! 355-Horse 2019 L84 5.3 Chevy V-8 Can Burn E85
by John Gilbert (Super Chevy) The big draw to E85 for gearheads was its 105 octane rating that’s no longer posted on the pump. It’s been a while since there’s been any mention of E85 connected with the new vehicles, but E85 is still around, and now with E10 gasoline prices going up there’s almost a one dollar-a-gallon difference in price. Our theory is California’s recent tax increase on a gallon of gasoline doesn’t affect the price of ethanol.
That’s in Southern California and of course wherever you might be prices, and availability can vary. I bought my first flex-fuel vehicle a 2000 S-10 brand new and at the time there was only one E85 pump in all of California an average Joe could buy E85 from.
Its reported and we’ve found it to be true due to less BTUs (British Thermal Units) the fuel mileage on E85 with its necessary 35 percent richer fuel mixture isn’t as good as gasoline. My personal experience in daily freeway traffic the GMC averages 13.3 mpg on E85 and climbs back to 15-16 mpg on 87 octane E10. Another interesting side effect of E85 is it takes longer for fresh engine oil to look dirty because there’s less crankcase contamination, and best of all every engine likes to perk up with extra octane and a much colder inlet temperature and its felt in seat of the pants acceleration.
“The increased variability of Dynamic Fuel Management means the engine will operate more often with a reduced number of cylinders, which saves fuel across the board,” said Lee. “Better yet, the transitions are transparent, and because the system is torque-based, you’ve always got that satisfying feeling of power on demand that comes from Chevy’s Gen V Small Block V-8 engines.” READ MORE