Nuke

Depending on who you're ordering the tunes from and what types of tunes they write, they'll need to know what your mods are (if any) and what octane tunes you want. Be aware that even the 87 custom tune kicks azz over the stock 87 tune. The octanes you select should be what's available in your area and where you travel. And you MUST run an octane fuel equal to or higher than the octane tune. For example, you can run 89 or higher octane with an 89 tune but don't try to run a 91 tune on 89 or 87 octane.

I keep the tuner in my trunk since I run an 89 octane tune and I travel a lot. I've had a few instances where I was near-empty and couldn't get anything besides 87 octane. I loaded the 87 tune and was back on the road in minutes.

atldave

The tech at my dealership told me NOT to run anything higher octane than 87. The injectors are computer tuned to run that octane and the V6 will not retune itself if you put a higher octane gasoline in the thank. The higher octane may even create premature wear and tear on the emission system. Also, higher octane fuels don't have more detergents than lower octane fules from the same company. Just buy a quality rated 87 octane and you'll be fine. Anything else wastes money on the V6. Of course, all that changes if you get a special tune.

Joshspony

just run the 87, unless tuned. Then run whatever octane fuel your tune is written for. When ordering tunes, you usually get 3 tunes. Get one for the 87, and 1 or 2 for the premium. That way, as mentioned, if traveling and you need to switch fuels you can. Or if you're short on cash you can switch.

pkwest

Your engine is probably pulling timing because of detonation with 87. Are you running a stock tune?

07 Stang

I have never used Seafoam or any other type of gas additives and haven't had any problems with using BP's regular gas. I do get regular oil changes and other maintenance done on a regular schedule.
Once in a while I'll use either Sam's Club or Costco gas and the car still runs fine.

Joshspony

Whether its true or not, I've always been told to try to use fuel from the same place. Better for your car.
I always run 91 no elthenol, I am tuned for the 91 octane as well. I have heard a lot of reveiws saying ethenol isn't great for your engine.

07 Stang

Yeah but what are going to do when all the gas stations you normally get gas from uses 10% Ethanol?

Joshspony

Every gas station around here is 10%. There are only 2 or 3 stations localy that offer ethenol free. It costs a little more but it will be available for a long time. Ethenol free is recommended for recreational equipment, boats, rvs, and things like that.

The added alcohol in ethenol gas supposidly dries out seals, O rings, gaskets, and hoses faster than straight gas. My tune isn't written specifically for ethenol free, so I can use it if I choose. I do think that my car runs better on ethenol free though.

teetertotter

For the past few years, with these higher tech engines with electroinics, I strickly use TIER ONE gasoline and if manual calls for 87 Octane usage, that is what I fill up with. I also throw in a can of Sea Foam every 25,000 miles or so. Works for me with no engine performance issues with our vehicles and know my injectors and valves will always be spotless. I always keep a copy of Tier One gas manufactures in our glove boxes.

staggolee

uh yes lol i wish I had seen this response earlier. Anyone else have any input on my engine pulling timing? Sounds like something I should be aware of