This is a discussion on So how much of a difference does this actually make? within the Engine Modifications forums, part of the Tech & Modifying & General Repairs category; Originally Posted by ZXNasty Well first off you will need to be tuned for it. So don't run to the ...
Don't click that ---> http://www.clubwrx.net/forums/member...1-obp-sti.html
Did someone say E85?
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ProTuned Stage 3ish '11 WRX Ltd HB (SWP) ~ 354 awhp 404 ft-lb tq on E85
Friends don't let friends drive Mitsubishis.
On a stock WRX or STI you can safely run 87 octane fuel. If there is any knocking the boost and timing will be cut back to keep the engine safe. You will likely see less power and perhaps less milage but you are very unlikely to have any engine damage from 87 octane fuel.
Once the engine is tuned, you do not want to run lower octane then what you are tuned for. The management sensors on the WRX are not very advanced compared to what is being used by GM, Ford and just about everyone else. So if your tuned for 93 octane and running higher the stock boost, 87 octane can cause knocking and the ECU will not be able to correct for it in time to prevent possible engine damage.
"Safely run 87" is incorrect. Follow the manual.
Posted from my mobile foruming mah-sheenz
People don't read their owners manuals? This is news.
omg wtf is wrong with people on here nowadays?!
Just put diesel in it and come back and post results.
--Anthony 2011 DGM WRX stg2+sf intake WTFtuned ¯\_(ツ)_/¯
Official Subie owner as of 01/10/11
Stink Eye Mob #87
Bye bye Bimmer
Hellooo '11 REX
Actually, I find manuals entertaining. And then there is the occasional "aha"-moment. Like when my windshield washer pump wouldn't work - because I didn't remember which way to use the combination switch (for lack of better word, the one on the right side of the steering wheel)...
You can't have everything - where would you put it?
My guess is you should familiarize yourself with the manual and your car first. I mean you've been running 87 octane on a car that clearly requires 91 at a minimum (93 optimally). Before you do anymore damage to your car, learn the car. I wouldn't worry about E85 or tuning whatsoever if you haven't even mastered the basics of opening up your car manual to see what fuel you should be putting into your tank.