View Single Post
Old 02-29-2012, 04:29 PM   #26 (permalink)
Allch Chcar
EtOH
 
Allch Chcar's Avatar
 
Join Date: Jan 2008
Location: North Coast, California
Posts: 429

Cordelia - '15 Mazda Mazda3 i Sport
90 day: 37.83 mpg (US)
Thanks: 72
Thanked 35 Times in 26 Posts
Quote:
Originally Posted by Old Tele man View Post
...and that "...test grade Gasoline..." is 91-octane (mid-grade), not the typical 87-octane often recommended for most engines! Talk about "gaming" the EPA fuel-economy test system!!!
Actually..when the manufacturers does the EPA MPG testing they are required to use the octane they recommend in the owner's manual. If there are enough reports of less than expected MPG they can get audited and they would be fined for such an action. That is why some companies will infact underrate their MPG.

The thing is they only ever use 100% Gasoline. So even 10% Ethanol you can expect up to 3% less MPG than whatever they tell you. And that is the federal law...
__________________
-Allch Chcar

  Reply With Quote