You need 91+ fuel
This is a discussion on The Type of octane to use? within the General Maintenance, Troubleshooting & Accidents. forums, part of the Tech & Modifying & General Repairs category; i was reading through ome threads and guy said he need 85 oct to run his wr sti.. i run ...
i was reading through ome threads and guy said he need 85 oct to run his wr sti.. i run 93-95 what's the difference i thought the high the better unless i misunderstood. help if you can..thanks
91 minimum, 93 is better.
would there be purpose to running a lower octane? isnt the higher octance better for your car in most areas?
higher or lower octane is not better or worse, it's different. High octane fuel is hard to ignite. The key is to use the proper to slightly higher octane required for your engine.
The higher the better in turbo charged cars. The lower ignition point of lower octane fuel makes it much more prone to knock, which is probably the number one killer of these engines.
Nope.. but with the higher ignition point the car can be tuned more aggressively before it starts knocking. Increases in timing and boost made possible by running higher octane are what produce more power.
It's also possible to run a leaner mixture with more knock resistant fuel, which also produces more power.
Kind of. Knock is when the fuel mixture in the cylinder isn't igniting at the correct time. The factory knock sensor is basically a microphone installed in the block that listens for a particular frequency of sound associated with combustion. If the gasses in the chamber aren't combusting at the right time it can cause all kinds of damage.
Engine knocking - Wikipedia, the free encyclopedia
Ill bet the guy was referring to using E85.