Quote:
Originally Posted by jdm free
imho i think the whole "i need 93 gas or my engine goes kaboom" **** is all bull. Ive driven my gsr wit 120k on it for probably 10k miles using 87 octane and no knock. and that was beating the **** out of it.
i drive my si the same way whether its 87 or 93 octane. i dont develop a knock and runs the same way it does when i bought it, when i put 93 or 87 in. ive talked to honda, mercedes, and infiniti techs and theyve all said it really wont make too much of a difference if u dont put 93 in it.
i dont care too much to put 93 in since its only like a buck or two more than regular 87 octane anyway
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This is the furthest thing from a bull sh*t subject. You need to educate yourself a little better before you start spreading horrible information to impressionable people on here. Or you will cause serious damage to peoples cars. Do you have any automotive credentials to back up your claim here bro other than a couple of retard techs "opinions"? Not all techs know what the hell they are talking about. And this is basic engine knowledge. Why do you think built race motors with high compression pistons and high boost motors HAVE to run higher octane fuel? They sometimes can ONLY run race fuel for it's extrremely high octane ratings. It's not just for power. It's from the super high pressures in the combustion chambers. And an 11:1 compression ratio is extremely high for a street driven production car. Most cars are around 10:1. And even that's a little high.
And the knock sensor doesn't really control anything it will just "hear" detonation and this will tell the ECU to retard ignition advance and add fuel. And when it's cold outside the cooler air will cause detonation even more because of the higher concentration of oxygen in the air which will burn all that much faster and better and there will NOT be enought ignition retard available to stop this. So if you want to play with fire to save a few pennies then go for it. I can understand if you have no choice but don't use more than a few gallons. Just use enough to get you somewhere that will have the proper octane fuel. Or go get some octane booster. Even though that stuff is pretty much a joke. But it will help enough to keep your motor in one piece.