What Kinda Gas?
1 - 20 of 33 Posts
Joined
·
22,040 Posts
Well, I can only find 93 most of the time, 91 is what it calls for, so under regular, around town driving, I doubt there would be much, if any difference. If you take it out the drag strip or to do some hard driving, particuarly in hot weather, you would probably see some differences.
Nothing but premimum should be run in forced induction cars. Fuel of a lower quality burns faster and not a completly as the higher octanes, resulting in pinging. This is like an earth quake in an enging, with the shock waves eventually eating into the pistons and valves. This can (and will after long periods) cause permenant damage.......There is a place in Boulder that sells 103 at the pump, but last time I bought it, it cost me 2.15 a gallon, this was when premium was around 1.65 a gallon......
Joined
·
99 Posts
Sunoco Ultra 94 only
G
Guest
·Sunoco Ultra 94 here, too. I have a Sunoco Gas Card. 
Well, I used it when I actually had my car.
Well, I used it when I actually had my car.
Joined
·
943 Posts
I run 93 all the time. My sport bikes all had 93 running through them. As a group, the riders I rode with, we would go and buy a drum of racing gas, something like 104 octane is the rating on it. We would use that on track days and such. It made a noticeable difference in the bikes, but I don't know about the car...
Joined
·
22,040 Posts
If you run the car in a racing environment, the added octane will only help if A) The car is built and programmed to take advantage of the high-octane fuel, in otherwords, if it can adjust the timing to take advantage of 103 octane racing fuel, or if it's computer will not adjust it beyond a certain point. If the computer will only adjust the timing to performance levels that are covered by using 91 octane, then it don't matter how high above 91 you go.
B) If you're car is running in a hard, hot environment, like a road course or drag strip, and you are experiencing knock and other related issues. Some cars are better than others at dealing with track conditions, and some will benefit from higher octane fuel in these situations.
Car and driver did an whole test section in which they took cars that required various levels of octane, 87, 89, 91, 93, and ran them on a dyno with various levels of octane in the gas. One of the BMW's in particular, actually put out less horsepower with 93 octane than with 89 octane. Don't quite remember what it was. None of the other cars did this, nor did any of the cars that call for lower octane fuel generate more horsepower on higher than recommeded octane levels. The cars that required 91 or 93, did lose horsepower, a great deal in some cases, by running fuel that was below the octane level recomended.
Bottom line, read the manual. It says 91 or better octane required.
B) If you're car is running in a hard, hot environment, like a road course or drag strip, and you are experiencing knock and other related issues. Some cars are better than others at dealing with track conditions, and some will benefit from higher octane fuel in these situations.
Car and driver did an whole test section in which they took cars that required various levels of octane, 87, 89, 91, 93, and ran them on a dyno with various levels of octane in the gas. One of the BMW's in particular, actually put out less horsepower with 93 octane than with 89 octane. Don't quite remember what it was. None of the other cars did this, nor did any of the cars that call for lower octane fuel generate more horsepower on higher than recommeded octane levels. The cars that required 91 or 93, did lose horsepower, a great deal in some cases, by running fuel that was below the octane level recomended.
Bottom line, read the manual. It says 91 or better octane required.
Joined
·
17 Posts
i run 91, but up here in buffalo, new york *worst city ever* it is about $2.17/gallon damn taxes
Joined
·
22,040 Posts
Dunno about that exactly, not sure what that would do to the fuel economy. I would think that if you're car is running a little underpowered, then you would be pushing the foot down a little harder to make up for it. You would be using the same amount of gas to get less power if you're running too low of an octane though, so maybe that actually would cost you gas mileage... hmmm... now I'm wondering... cause there are days that I look at the gas mileage that I'm getting and think, wow thats low... there are also days that I fill up with 91 instead of 93 due to where I stop for gas.yianco465 said:
1 - 20 of 33 Posts
Join the discussion
