View Single Post
Old 03-16-2010, 02:43 PM   #3 (permalink)
gone-ot walking...
Join Date: Jul 2009
Location: .
Posts: 6,190
Thanks: 179
Thanked 1,525 Times in 1,126 Posts
...yes, the "new" engine-management computers actually *WILL* advance the timing to "take advantage" of higher octane (less knock-prone) gasoline.

...that's *part* of the reason why some of the "newer" cars can often achieve better FE when using E85-fuel, which has 105 octane rating, due to ethanol's much higher octane rating (113) than 'straight' gasoline., the real answer may lie in what year vehicle the guy was talking about--pre-electronics carburation, OBDI or todays' OBDII?

Last edited by gone-ot; 03-17-2010 at 02:56 PM..
  Reply With Quote