anyone know about "winter" gas? I remember a few years ago that certain areas of the country would get oxygenated gas (I think that's what it is) during the cold months to reduce air pollution, then go back to "regular" gas when it warmed up. Is this still done? Am I anywhere near to remembering correctly?

 

Yes. Generally in the more poluted areas of the country. The North eastern United States gets it. The stuff is bad as it will gum up your fuel system much sooner than regular gas. If you are going to let your car (or any engine) sit with it in for any extended length of time use a fuel stabilizer in it.

 

Gasoline formulation changes at least twice a year to compensate for temperature differences, but the change you are referring to probably is an area EPA mandate regarding emissions which is different.

Back in the days of mechanical fuel pumps and carburetors it was very important to control gasoline volatility. Maybe less critical today and probably more important in some areas than others. The change over time was always difficult on some cars that had trouble with

 

Actually, after my post I did find a link to an EPA site that talks about it.

The reason I am asking is I seem to be one of the few people with a SC that still has significant problems, especially when the temps are warm. This part of the country (NE) is very variable in temps right now and I wouldn't think we've transitioned to the "summer" mix yet. I am wondering if the fuel formulation may have anything to do with the problems - still on the "winter" formulation, temps go to 70s (even 80s a few weeks ago!), gas + SC + ECU = don't work right?

Just a wild stab.

 

Why don't you try a tank of Cam 2 racing gas? I don't think they have the winter blend regs to worry about. It is expensive but it will enable you to test your theory sooner.

 

where might one procure this combustible delight?

 

The Sunoco station down the block sells it by me. I would check your yellow pages. A gas station that is involved with racing or maybe you can check with your local speed shops and ask if they know the nearest dealer by you. You could try aviation gas available at your local airport (make sure it is unleaded). Drag racers use it also.

 

[QUOTE]Originally posted by Bieg
[B]You could try aviation gas available at your local airport (make sure it is unleaded).

 

Yes, you can buy Avgas here but I don't think it is a good idea. It uses a different octane measurement so it is not directly comparable to regular pump gas, and the nolead can easily be low-lead.

An alternative is to go to the track (or station that sells it) and buy nolead racing gas.