| Author | Message | ||
     Pkforbes87 |
What are the fuel octane limits (high and low) that my 2000 x1 should be running? Engine is stock internally. I've been using 91 as long as I can find it without ethanol. | ||
| Newbuellertoo |
I generally use 91 in my 2000 s3. I sometimes throw in a tank of Sunoco 94 and maybe it's just my imagination, but it does seem to run better on the 94. | ||
| Pkforbes87 |
A local track offers 94 octane. I think I'll give it a shot and see if there's any difference. | ||
| Sparky |
Make sure that 94 octane is safe for the oxygen sensor, meaning unleaded. | ||
| Pkforbes87 |
Thanks for the heads up. I double checked and the track offers 94, 100, and 110 - all unleaded. | ||
| Tim |
Unless your experiencing detonation with 91 octane there is no benefit to running higher octane fuel. | ||
| Dentfixer |
What Tim said is true. Higher octane is merely for the prevention of pre-ignition, or pinging as it is commonly called. Octane requirement is related to engine compression ratios. Higher compression requires higher octane fuel to prevent pre-ignition. If you put high octane fuel in a low compression engine, you are running on fuel that does not ignite as well as you need. Theoretically, you should get worse performance. Think about it. |
