You'll feel a definite difference with a higher octane tune and fuel. There is a downside to it though. Once you get hooked on the higher octane tune performance, it'll be almost impossible to go back to a lower octane tune, even if the gas prices keep going up. Drop back down to save money and your car will feel sluggish.
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2005 V6Mustang coupe. Automatic. Black with Charcoal Interior
Mods: JLT CAI, Bamachips 91 race tune, single Mustang V8 muffler, Mustang V8 swaybars
Looks: smoke front turn signals, sequential taillights, 14" shorty antenna, MRT rear window louvers and a little chrome for the interior 2000 C5 Corvette convertible, Torch Red with Black Interior. Full of options, Corsa exhaust 1990 Ford Bronco 351ci engine- it runs.
You'll feel a definite difference with a higher octane tune and fuel. There is a downside to it though. Once you get hooked on the higher octane tune performance, it'll be almost impossible to go back to a lower octane tune, even if the gas prices keep going up. Drop back down to save money and your car will feel sluggish.
+1 You are right. I tried to go back but could stand the performance
or should I say NO performance.
If you get a tune for a higher octane you may feel a slight difference, if you just put in higher octane your just wasting money.
Well.. that's not entirely true... The Spanish Oak (the cars computer) will automatically try to adapt to the higher octane gas... The knock sensors will actually ADD timing if they think the car is under sparked... I've seen this while we were tuning my car...
One of the magazines actually tried this out on a S197 GT and found that just higher octane gas netted 5RWHP... so... it's not a complete waste of gas... you just need to decided if the benefit is worth the cost...
All technical reasoning aside, I've always noticed sluggishness going from higher octane to lower. She doesn't seem to have a taste for the local Murphy Oil gasoline, either.
Well.. that's not entirely true... The Spanish Oak (the cars computer) will automatically try to adapt to the higher octane gas... The knock sensors will actually ADD timing if they think the car is under sparked... I've seen this while we were tuning my car...
One of the magazines actually tried this out on a S197 GT and found that just higher octane gas netted 5RWHP... so... it's not a complete waste of gas... you just need to decided if the benefit is worth the cost...
ok maybe its just me but I drive the hwy ALOT. When I first got the car I put 91 (premium) in it. I got 450km to a tank. I dropped to 89 (mid-grade) and I get 600km per tank... No tune ever
That's because stock, the vehicle is tuned from the factory to be most efficient with the lower octane fuel.
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2005 V6Mustang coupe. Automatic. Black with Charcoal Interior
Mods: JLT CAI, Bamachips 91 race tune, single Mustang V8 muffler, Mustang V8 swaybars
Looks: smoke front turn signals, sequential taillights, 14" shorty antenna, MRT rear window louvers and a little chrome for the interior 2000 C5 Corvette convertible, Torch Red with Black Interior. Full of options, Corsa exhaust 1990 Ford Bronco 351ci engine- it runs.
ok so I bought a predator a few days ago, put the 91 octane tune in it, I am still under suspention so I can't drive for 2 1/2 more months, but now that I have that tune will I get better gas milage from the 91 octane? As well I have 89 octane in it right now should I go back to the stock tune drive it to the gas station when I can drive again then do the tune?? I just did it right away to see how the tuner works
Be real sure you run a full tank of 91 through the vehicle BEFORE you put in the 91 octane tune to get rid of any residual lower octane fuel in the tank. If you just top off a tank of 89 fuel with some 91 or drive with a tank full of lower octane fuel, you're going to get detonation and pinging (not a good thing) because the timing will be way off.
Put the stock tune back in, use up the fuel in the tank till your running on empty, then fill up with a tank full of 91 and put the new tune in.
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2005 V6Mustang coupe. Automatic. Black with Charcoal Interior
Mods: JLT CAI, Bamachips 91 race tune, single Mustang V8 muffler, Mustang V8 swaybars
Looks: smoke front turn signals, sequential taillights, 14" shorty antenna, MRT rear window louvers and a little chrome for the interior 2000 C5 Corvette convertible, Torch Red with Black Interior. Full of options, Corsa exhaust 1990 Ford Bronco 351ci engine- it runs.
Gas Octane - will I see a difference in performance? 
