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11-06-2009
hey sorry if this is posted somewhere else, if it has i havent found it. I have a GT with K&N FIPK CAI, and magnaflow mufflers. My car is naturally aspirated, i have no turbo or supercharger with a stock PCM. It says to run my car on regular octane. Would i see any benafits at all if i go to premium? would i get a few extra hp?? or would it just rape my car? thanks guys.
11-06-2009
No added benefit with an N/A application. I had a cammed L36 with full exhaust, intake, hv3, and ported heads and I decided to get a 5 gal can of 104 octane unleaded and it did absolutely nothing for my times.
11-06-2009
yeah, your car wont knock as much which means it will run better. anyone that says you dont need high octane on a car that you drive hard is an idiot.
11-07-2009
Don't need high octane on a Yaris
11-07-2009
......you....Originally Posted by bluegtp91
11-07-2009
YES!!
I win.
11-07-2009
LMAOYES!!
I win.
11-07-2009
oh and i run 93 in my car all the time. and i have even since before the ****ty zzp tune.
11-08-2009
In my opinion, unless it is tuned and raced use what the manufacturer calls for. It may seem a surprise to many, but the manufacturers do spend lots of time developing their vehicles, if they say use 89, 91, 93, 105 oct then why mess with something engineared for that type of fuel. I know many will say the manufacturer has no idea what there doing and they know how to make and run a vehicle better, but for my money I just stick to what the owners manual says. My 2 cents worth take what u want from it
11-08-2009
have you scanned a bone stock GT lately? they knock from the factory, especially when you run them on 89.
11-08-2009
If you are going to beat on it run premium. If not run 87.
11-11-2009
don't it burn better and not clog your injectors as much with premi?
11-11-2009
Premium burns slower so will will get worse mileage. The only reason it helps your injectors is that premium usually has more detergents in it.
11-11-2009
Premium should be burning quicker to produce more power.
With premium you can get better timing which actually increases fuel economy as well.
Last edited by matt5112; 11-26-2009 at 06:01 PM.
11-11-2009
What out raising timing you will get worse mileage it is a proven fact.
11-12-2009
Facts don't start with questions and end with statements. I HAZ CONFUSE!
11-13-2009
I think that's what he is getting at...you can run more timing with higher octane. Alot of newer vehicles have sensors that detect the octane rating and adjust spark accordingly.
11-23-2009
My view of the octane debate used to be run what the owners manual said, my 01 4 cylinder ford ranger had no performance improvement with 93 octane over 87 and the mileage remained at 25 mpg.
Though Bio had me thinking and put 93 octane in my bone stock GT this week and my mileage went from 18 to 21 mpg with my usual city driving. Since I don't have a scanner I can't test myself but when (low rpms?) and why does a stock L36 knock? Is it the compression of these motors compared to others?
11-23-2009
They all knock from the factory, has a Stock L36 ever chipped a piston running 87 probably 10 or 20 out of the millions of L36's out there....Stock car, Stock tune, run 87..... If 93 makes you feel more comfortable though, I guess the extra 2 bux a fill up is worth it
11-26-2009
A modded L26 or L36, Especially one with a PCM Tune SHOULD be running at least 91-93 octane. Especially since the timing will be a bit higher than stock, which is the main reason why a tune make more power on those motors, it all in the timing....
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