what gas does every on use?
Site Moderator/B5 Tech Guru
Joined: Feb 2010
Posts: 1,745
From: Bay Area, CA
me too and shell.
And for all of those guys that use lowest... thats really bad. No offense, but I really hate it when people don't take care of their car, instead of paying 6 extra dollars a month, for your car to run good, you gunna pay alot more later on, unless you manage to dump it on someone else...which is worse..
And for all of those guys that use lowest... thats really bad. No offense, but I really hate it when people don't take care of their car, instead of paying 6 extra dollars a month, for your car to run good, you gunna pay alot more later on, unless you manage to dump it on someone else...which is worse..
Originally Posted by lm0812
The octane rating is the fuel's resistance to detonation. Detonation is the ignition of the fuel mixture before the piston has completed its compression stroke.
The ideal octane rating for your engine is the octane that produces a stoichiometric reaction, where the fuel and air are completely combusted. Ideally, you should use the lowest octane possible that doesn't cause detonation.
Using too high of an octane fuel will cause a decrease in power, due to the fact that it takes more energy to ignite the mixture. On the other hand, using too low of an octane rating increases your risk of detonation (causing eventual damage to the motor.)
if your car is stock, 91 will do fine. If your tuned for 93, use 93.
The ideal octane rating for your engine is the octane that produces a stoichiometric reaction, where the fuel and air are completely combusted. Ideally, you should use the lowest octane possible that doesn't cause detonation.
Using too high of an octane fuel will cause a decrease in power, due to the fact that it takes more energy to ignite the mixture. On the other hand, using too low of an octane rating increases your risk of detonation (causing eventual damage to the motor.)
if your car is stock, 91 will do fine. If your tuned for 93, use 93.
1st Gear
Joined: Sep 2010
Posts: 33
From: Seattle, WA
To my knowledge, there is no reason to run 93 in a 1.8T that is not specifically tuned for 93. My owners manual recommends 91 and thats what I use.
No offense, but its really annoying when someone assumes that because the number is higher and more expensive, it is therefore better for your car.
But hey, in the end its your car and your decision. Using 93 won't do any physical harm, and if it makes you feel safer using 93, by all means use it.
No offense, but its really annoying when someone assumes that because the number is higher and more expensive, it is therefore better for your car.
But hey, in the end its your car and your decision. Using 93 won't do any physical harm, and if it makes you feel safer using 93, by all means use it.
Thats why I run 93. Most gas stations around here are 87/89/93. I only rarely ever see 91 anyplace.
Considering my APR tune was performed somewhere in the north east before you owned the car, I think I have a 93 tune (since you can't find 91 anywhere up there). Now that I'm stuck back in the mid west, 91 is my only option. I use it in both cars (the wife's Maxima too) because that is the MINIMUM recommended octane.
So, either the car manufacturers are in bed with big oil, or there is a reason it's recommended. I'll bay the extra 2-3 bucks a fill up for the good stuff.
So, either the car manufacturers are in bed with big oil, or there is a reason it's recommended. I'll bay the extra 2-3 bucks a fill up for the good stuff.
1st Gear
Joined: Jun 2008
Posts: 115
From: Willow Springs, IL
me too and shell.
And for all of those guys that use lowest... thats really bad. No offense, but I really hate it when people don't take care of their car, instead of paying 6 extra dollars a month, for your car to run good, you gunna pay alot more later on, unless you manage to dump it on someone else...which is worse..
And for all of those guys that use lowest... thats really bad. No offense, but I really hate it when people don't take care of their car, instead of paying 6 extra dollars a month, for your car to run good, you gunna pay alot more later on, unless you manage to dump it on someone else...which is worse..
Buy good gas.
