Originally Posted by Tcoat (Post 2521082)

I tend to just throw in the highest available where ever I happen to be when I need gas. Since I burn through two tanks a weeks the locations can be pretty random and once can be 91 and the next 93 or even 94. Possibly because my ECU never gets a chance to level out on one level of fuel I never notice any difference between one tank and another regardless what level I pump into it. That is the beauty of a ECU that learns since it will adjust to whatever the situation is, give you the best for what you have and reduce the risk of issues.

Originally Posted by PandaSPUR (Post 2521068)

:laughabove:







Yep.

Originally Posted by Jonathanlim (Post 2521090)

Which is better? Run 93 with 91 or 93 map?

Originally Posted by PandaSPUR (Post 2521091)

93 with 93 map will better, especially if you're running FI. But its dangerous to use a tune that depends on 93 with only 91.



On a stock car with stock tune, it wont really matter.

Originally Posted by Jonathanlim (Post 2521098)

I'm on oft. I usually pump 93 and run 91 map.

Originally Posted by Jonathanlim (Post 2521098)

I'm on oft. I usually pump 93 and run 91 map.

Originally Posted by theadmiral976 (Post 2521152)

As others have said, running a higher octane fuel on a map set up for lower octane fuel isn't going to cause a problem. Obviously you won't be getting the most out of the car; however, it certainly won't damage the engine. Depending on the general quality of gas where you drive, where you purchase fuel, and how closely the fuel quality regulations are followed in your area, running the 91 map might actually be the optimal choice...

Originally Posted by RichardsFRS (Post 2519461)

What will 93 get me. It's in most stations here

Originally Posted by humfrz (Post 2521007)

It may be ... down in Georgia .......

:scared0016:
(humfrz)

Originally Posted by Tcoat (Post 2521082)

I tend to just throw in the highest available where ever I happen to be when I need gas. Since I burn through two tanks a weeks the locations can be pretty random and once can be 91 and the next 93 or even 94. Possibly because my ECU never gets a chance to level out on one level of fuel I never notice any difference between one tank and another regardless what level I pump into it. That is the beauty of a ECU that learns since it will adjust to whatever the situation is, give you the best for what you have and reduce the risk of issues.

Originally Posted by fumanchu1 (Post 2521196)

Although I would not take the chance of running 91 on my 94 map because you know... boost

Originally Posted by fumanchu1 (Post 2521196)

Although I would not take the chance of running 91 on my 94 map because you know... boost

Originally Posted by fumanchu1 (Post 2521190)

Sorry never used 93% octane, have used 93 octane but never 93%. I use 94 (Canada we have 87,89,91 and 94)

Originally Posted by fumanchu1 (Post 2521192)

93% in Georgia I believe is the percentage of siblings involved in romantic relations not the octane percentage of fuel
:scared0016:

Originally Posted by PandaSPUR (Post 2521204)

Yea lol, pretty sure tcoat was talking about just the stock tune. Any custom tune thats meant for 93 or above shouldnt be used with anything below.

Stock tune is basically mapped for 91 I assume, and 93 just gives you more of a safety net.