View Full Version : How many use 100 octane?

02-02-2005, 07:06 PM
just curious b/c that's all ive put in mine since day one...I know mine's not a daily driver, so that has a little bit to do with it...just wondering if anyone else is as dumb as myself to pay $4.79/gal??

02-02-2005, 09:07 PM
No way, Jose! It's 93 octane for me all the way! :thumbsup: Can't afford that $5.00 a gallon price tag.

02-02-2005, 09:45 PM
Why waste the money for less power. Unless your monkeying around
with timing or a cheap chip, 93 is plenty good enough for the stock
computer to run strong without detonaton.

02-02-2005, 10:40 PM
I run 93 octane and so far no troubles. With all the testing the factory does, 100 octane might be a little to much insurance and maybe to much of a cash investment(for me anyway). But when we turn the boost up it might be needed? You might be the only one running safe.

02-03-2005, 04:25 AM
I ran some, 2 gallons or $10.00, at the track to ward off detonation with the supercharger, better safe than sorry! Otherwise I don't normally run it.

02-03-2005, 07:04 AM
Considering the way my Cobra eats gas, the cheaper 93 Octane fuel is just fine. If not a daily driver, and only a weekend warrior, I guess that would be fine.

02-03-2005, 08:11 AM
the cheaper 93 Octane fuel is just fine. .:thumbsup:

Same here. Hest is the cheapest in the area or Sam's Club, but the line at Sam's is a killer.

Big Daddy
02-03-2005, 08:49 AM
I have mine tuned for 93 so there is no good reason to run 100. Every now and then I will run some 100 at the track just to be safe. Now I have the Snow Boost Cooler so I won't be running any more 100 at al. :D :thumbsup:

Twice Bitten
02-12-2005, 09:44 AM
I buy a 55 gallon drum of 104 and keep on hand, I add 5 gallons every time I need to fill the car up. The extra insurance is worth the cost, everyone said I would blow up the '03 with all that boost, but I have not yet. I am thinking about the future when the 4.6 does die, "there is no replacement for displacement." :D

02-14-2005, 10:08 AM
I'd say if you up around 550-600+ rwhp (like bigdaddy) a gallon or 2 per tank would be some pretty good insurance. But for a mildly modified '03 cobra 450-480rwhp pump gas is what should be used. A proper tune will be more than sufficient, but IMO, with 600 rwhp, a gallon or 2 of race gas (or 100 oct) should be used if you plan on thumping on the car hard.