So the only gas stations in my town that have 93 are converting to 91 within the next week or so. Right now I'm currently tuned on 93, so what I was wondering is that do I need a re-tune for 91, and if so how long can I safely or economically run 91 before a re-tune?
Thanks

 

you need a retune. Pull timing.

 

Time for E85?

 

I wish, closest E85 station is about 7 hours away.

 

That probably means Bozo and Buildings will phase out their 93oct. too.

Definitely will need a retune, and if that is not possible for a while, and you still want to hot rod it, I would dump a gallon of toluene in with every fill.

 

How far away is the nearest 93 gas station?

Has the state given the residents reasons why they are switching fuel. I don't know how that is legal. Unless you bought a California spec'd car I would imagine alot of the cars that leave the dealership needing premium would also have na issue as well.

How do they justify that?

 

^the closests station is about an hour and a half away...the gas station attendent didnt know why they are switching, but my best guess is the manufacturing cost.

Also I was talking to my friend and he said I would be fine without a retune because of the elevation of my town (3400 ft) is he right.

 

that's fn awful

 

Where do you live???

 

Though it says it under my avatar, I live in Missoula Montana.

 

I wouldn't take the chance.

 

Just add toluene or xylene to your fuel and raise your octane back up. Done.

 

We don't have pump 93 in our area here in Kansas. We had one station in town and they stopped carrying pump 93 without notice. Gas companies can do what they want. Most cars coming out of factories for premium fuel usually mean pump 91 minimum from what I've seen.

 

ah gotcha.

Noone really can tell you how long you will be safe. It can brings knocks. I will get a retune soon to be safe. It's always good to have two maps if you can.

 

Thats nuts. How toulene do you add to 10 gallons of 91.....what would that make the octane rating?