[brads911sc]

the question is not whether we can buy ethanol free fuel. there are almost none. the total list represents less than 1% of the gas stations in Houston alone. There are virtually no stations in the 5 largest Texas cities and we are the oil refinery capital of the world. That is because E10 is federally mandated. I suspect that if you test most of those stations on that list you will fine ethanol. despite the stickers on the pump. is marathon really manufacturing ethanol free fuel for your one small station? the marathon gas in houston absolutely has ethanol.. and its refined here. not likely your small station has a deal for ethanol free fuel. its much more likely the pump is labeled wrong. id love to see some test results.

the real question to be addressed is what we need to do to our cars to preserve them and allow them to run properly.
Jaime is already instructing those with MS EFI to alter the AFR and VE tables to accomodate. I think he multiplied his AFR tables by .94 and his VE tables by 1.06.
On MFI, CIS, Motronic systems it may be good to think through and test likely scenarios.
I think the old AFR targets of 14.7 go out the window and targets in the low 13's become likely. example, my car runs like crap at idle at wideband control of 14.7. I am running 12.8-13.2 and have a smooth idle. As soon as i go north of 13.5 i get severe lean symptoms. If we use our old AFR targets we will be extreme lean at higher RPM's. (I run Chevron 92)
I have a hotter cam so not ready to say its all fuel related... but the AFR/VE tables have to be impacted.


So rather than hand wringing... i would have the pros do some testing to see what optimal AFR/VE tables / values look like for Gas, vs E10, vs E15, vs E20, etc. We have a few years before the oil companies could even do E20... so no need to panic...