octane
11-13-2003, 09:32 AM
#11
Guest
Posts: n/a
octane
Originally Posted by SilverGTV8
High octane is recommended for high compression motors and forced induction.
Can higher octane damage a car? Yes. If your car is say a buick or a honda. (I say buick because I worked with a service manager for buick and this was a commen occurance). Basically the motors spark has trouble making enough heat (spark) to ingnite the fuel The fuel may not completely burn fast enough and may enter the exhaust system and damage your cats.
Can higher octane damage a car? Yes. If your car is say a buick or a honda. (I say buick because I worked with a service manager for buick and this was a commen occurance). Basically the motors spark has trouble making enough heat (spark) to ingnite the fuel The fuel may not completely burn fast enough and may enter the exhaust system and damage your cats.
Very good post indeed. But I have to say a little something about the Honda thing.</P>
High Octane is for high compression motors, yet you say you shouldn't run high octane in a Honda? Any Civic Si, Integra GSR, Type R, or S2000 (to name just a few) you need at least 91 octane. 10.2:1 compression ratios are a killer to some Hondas. I never had a problem with at least 91 octane in my Escort either, which ran a 9.0:1 comp ratio but didn't require premium. <IMG src=smileys/smiley2.gif border="0"></P>
11-13-2003, 09:40 AM
#12
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Join Date: Jul 2003
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octane
one thing left out is with higher octane the flame across the piston is more even. which it lets a higher compression engine be more effient. so save your 1-2 dollars per tank for mods.on a stock engine I just use the mid-grade.going from 89 to 93 octane you will see no advange to a near stock/stock car.<edited><editID>vfast</editID><editDate>37938.3200925926</editDate></edited>
11-13-2003, 10:10 AM
#13
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Join Date: Sep 2003
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octane
Originally Posted by vfast
one thing left out is with higher octane the flame across the piston is more even. which it lets a higher compression engine be more effient. so save your 1-2 dollars per tank for mods.on a stock engine I just use the mid-grade.going from 89 to 93 octane you will see no advange to a near stock/stock car.
yep what he said. Listen guys, octane rating IS NOT the "quality" of the fuel, its simply its ability to resist detonation, and it also require more heat to ignite. The excess heat needed would have to come with either higher compression or alot better ignition system. And the thing is, even if you do get a better ignition system to ignite that fuel properly, all you would be doing is not losing HP from running the higher octane. Thats right, if you runhigher than required octane fuel than you will not only NOT gain ANY hp, but you will likely lose hp. </P>
Now, some fuels have additives that can increase performance, but that has nothing to do with octane.</P>
11-13-2003, 01:50 PM
#14
3rd Gear Member
Join Date: Sep 2003
Location: United States
Posts: 606
octane
Originally Posted by mdvaldosta
if you runhigher than required octane fuel than you will not only NOT gain ANY hp, but you will likely lose hp.
so true, thats why you see guys bumping their timing a bit to take advantage of higher octane fuel or getting a chip. without them you're throwning money away.</P>
its a good idea to use a higher octane fuel in the summer time if you live in hot areas, or driving through adesert - more of a problem here in the south west,since your engine is more likely to experience detonation.</P>
11-14-2003, 01:57 AM
#16
Join Date: Nov 2003
Location: United States
Posts: 20
octane
Look...For me it is this simple. There just is not enough differences in gases to make me not buy premium. Here in So Cal, we only get 91 (Which SUCKS! I'd much rather use 93 or 94) and I use that no matter what.
Treat your engine good, and it will treat you good back. I ain't puttin ANYTHING less then premium in my Mach 1, and I wish I could get higher octane. I would pay the difference!
Treat your engine good, and it will treat you good back. I ain't puttin ANYTHING less then premium in my Mach 1, and I wish I could get higher octane. I would pay the difference!
11-14-2003, 03:26 PM
#18
4th Gear Member
Join Date: May 2003
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Posts: 1,205
octane
Thanks Monch, I was hoping someone would be kind enough to tell him that he's supposed to use premium in that car, even still w/everyone telling him he doesn't understand that not all cars perform better, because of higher octane. Oh well.
11-14-2003, 06:20 PM
#20
Join Date: Nov 2003
Location: United States
Posts: 20
octane
But, what I am saying, is why wouldn't you use premium in your GT all the time? Yeah, my Mach requires premium but premium in general is going to be better for your car in the long run. And the price difference just isn't enough for me to put a less octane gas in my car.</P>
All V8 Mustangs should be running premium, I say.</P>