93 octane over 87, with a tuner?

Thunderscrash · February 1st, 2011, 03:06 PM

I just got my tuner a few weeks back. Ive only been running the 87 tune because roads are shitty and I dont need more power or anything to daily drive. My buddy told me I should just run 93 octane because its better for the motor. What do you guys think? Ive been told that without the tune, 93 doesnt make a difference. Is 93 really better for the car or does it just help the environment and add a little power?

mjpjr45 · February 1st, 2011, 03:13 PM

No. Running 93 without a tune, is a waste of money. It's actually worse enviromentally to run higher octane, as it doesn't burn completely.

WickedSnake00 · February 1st, 2011, 03:24 PM

Octane is a formula which expresses a fuel's ability to resist knock. Long scientific explanation short, higher octane, less chance of knock. By switching to higher octane you can run more advanced timing and higher compression, thus higher power.

If you're not near the threshold of knocking, you will gain nothing, except a lighter wallet from running higher octane.

cedsks · February 1st, 2011, 05:43 PM

Originally Posted by WickedSnake00

Octane is a formula which expresses a fuel's ability to resist knock. Long scientific explanation short, higher octane, less chance of knock. By switching to higher octane you can run more advanced timing and higher compression, thus higher power.

If you're not near the threshold of knocking, you will gain nothing, except a lighter wallet from running higher octane.

exactly true... I run the 87 most of the time. The only difference I notice with the 93 oct is the American Muscle Race tune.... But it results in 5-9 MPG....

Thunderscrash · February 1st, 2011, 06:14 PM

Thanks thats what I figured I'll just run the 93 in the in the summer and 87 in the winter. It wont hurt to keep switching back and forth as long as I use the right gas, right?

WickedSnake00 · February 1st, 2011, 06:41 PM

I don't see why you would even use 93. Generally if you need 93 octane, you have to use it all the time, because if you used a lower octane rating, you'd suffer extreme detonation, and would have an eight cylinder paperweight real fast.

If you can run 87, you don't need 93. You can run it, it won't do any harm, but it won't do any good. You'll just be pissing away your money.

sharkbait · February 1st, 2011, 07:01 PM

Unless your tune requies 93

you run 87

/thread

February 1st, 2011, 03:06 PM	#1
Thunderscrash Regular 2000 GT N/A Join Date: Oct 2010 Location: Delaware? Posts: 478 iTrader: 0 reviews	93 octane over 87, with a tuner? I just got my tuner a few weeks back. Ive only been running the 87 tune because roads are shitty and I dont need more power or anything to daily drive. My buddy told me I should just run 93 octane because its better for the motor. What do you guys think? Ive been told that without the tune, 93 doesnt make a difference. Is 93 really better for the car or does it just help the environment and add a little power?

February 1st, 2011, 03:13 PM	#2
mjpjr45 Regular 2003 Mustang GT Join Date: Apr 2010 Location: Sunset, LA Posts: 477 iTrader: 0 reviews	No. Running 93 without a tune, is a waste of money. It's actually worse enviromentally to run higher octane, as it doesn't burn completely. __________________ Rules to live by. Rule #4: Double Tap Rule #32: Enjoy the little things.

February 1st, 2011, 03:24 PM	#3
WickedSnake00 MM's king of Neon's 404 - car not found 17.81@87 Join Date: Aug 2010 Location: Diesel Engine Capital of the World, Columbus, IN Posts: 7,374 iTrader: 0 reviews	Octane is a formula which expresses a fuel's ability to resist knock. Long scientific explanation short, higher octane, less chance of knock. By switching to higher octane you can run more advanced timing and higher compression, thus higher power. If you're not near the threshold of knocking, you will gain nothing, except a lighter wallet from running higher octane. __________________ Official Secondhand Snake Build Thread Here Looks Like a Cobra, Sounds Like a Cobra, Tastes Like a Cobra, Not a Cobra. For Sale: P71 Interceptor motor

February 1st, 2011, 06:41 PM	#6
WickedSnake00 MM's king of Neon's 404 - car not found 17.81@87 Join Date: Aug 2010 Location: Diesel Engine Capital of the World, Columbus, IN Posts: 7,374 iTrader: 0 reviews	I don't see why you would even use 93. Generally if you need 93 octane, you have to use it all the time, because if you used a lower octane rating, you'd suffer extreme detonation, and would have an eight cylinder paperweight real fast. If you can run 87, you don't need 93. You can run it, it won't do any harm, but it won't do any good. You'll just be pissing away your money. __________________ Official Secondhand Snake Build Thread Here Looks Like a Cobra, Sounds Like a Cobra, Tastes Like a Cobra, Not a Cobra. For Sale: P71 Interceptor motor

February 1st, 2011, 07:01 PM	#7
sharkbait Hooo Ha Ha 1997 Mustang GT 11.65 @ 115 Join Date: Apr 2009 Location: Pasadena MD Posts: 9,743 iTrader: 10 reviews	Unless your tune requies 93 you run 87 /thread __________________ 410rwhp 520rwtq @ 12.9 psi

February 1st, 2011, 06:14 PM	#5
Thunderscrash Regular 2000 GT N/A Join Date: Oct 2010 Location: Delaware? Posts: 478 iTrader: 0 reviews	Thanks thats what I figured I'll just run the 93 in the in the summer and 87 in the winter. It wont hurt to keep switching back and forth as long as I use the right gas, right?

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