View Single Post
Old 08-03-2008, 11:55 PM   #15
CamaroSpike23
Mr. Nitpicky
 
CamaroSpike23's Avatar
 
Drives: anything I can get my hands on
Join Date: Sep 2006
Location: anywhere and everywhere
Posts: 22,930
Send a message via Yahoo to CamaroSpike23
Quote:
Originally Posted by rcreechssr View Post
With the new computer controlled engines, it would appear that octane rating is not as critical to prevent pre-ignition as in older engines. These engines will self adjust and run on 87 octane. However, as stated by others in this thread, you will lose some performance and in my experience some gas mileage (1-2mpg).
Now the economics. 92 octane is generally $.20-.25 more than 87 octane. My logic says that in a typical 20 gal. fill up, I'll pay roughly $4.00-$6.00 more per tank. In my opinion, that aint bad for a tank of higher performance, and better gas mileage. Just a thought.
while computers in automobiles do self adjust to run on lower octane gas, thats whats hurting your performance. they cut back the spark timing to prevent detonation (combustion cycle preignition) which means you dont start the combustion cycle till later in the rotation of the motor which means you arent reaching your full power potential

i spend 45 bucks to fill my car up (roughly) 14 gal tank, i fill up with 10-11 gal (cus i dont run my car down past 1/4 tank cus it can be detrimental to performance and the fuel pump). as ive stated before, i wont put 87 in my car. its a rare occasion that i'll even run 91 or... dare i say it 89.

93 for me baby
__________________
Never race anything you can't afford to light on fire and push off a cliff
Quote:
Originally Posted by BowtieGuy View Post
Nobody makes CamaroSpike happy. You just disgust him a little less than other people.

Quote:
Originally Posted by Bulldogwinters View Post
Read that link that Spike posted, it'll tell you everything you need to know.
Quote:
Originally Posted by WheelmanSS View Post
Post count is truly an accurate measure of how cool someone is on the Internet.
Quote:
Originally Posted by Greg Norris View Post
I piss excellence
and fart awesomeness
Quote:
Originally Posted by BowtieGuy View Post
Nobody makes CamaroSpike happy. You just disgust him a little less than other people.
"You can think I'm wrong, but that's no reason to quit thinking.
Quote:
Originally Posted by Overflow View Post
But not all people were born awesome like you, Spike.

Last edited by CamaroSpike23; 08-04-2008 at 10:24 AM.
CamaroSpike23 is offline   Reply With Quote