I'm giving this three stars because I can't definitively prove the below but have strong suspicions, soooo...
I fear there's questionable gas here. They have E85 which checks out by both a density alcohol tester and in-line FlexFuel sensor as around 84% - but neither...
Read MoreI'm giving this three stars because I can't definitively prove the below but have strong suspicions, soooo...
I fear there's questionable gas here. They have E85 which checks out by both a density alcohol tester and in-line FlexFuel sensor as around 84% - but neither of those differentiate between ethanol and methanol content. People should be aware there have been certain less-than-savory businesses nationwide mixing cheap methanol into their flex fuel blends to boost their alcohol content and trick the flex fuel sensors into thinking the ethanol content is higher than it actually is.
Here's why I suspect as much from this location and why it matters: the very first fill-up from this station and my check engine light comes on 20 miles later for a small EVAP leak. No big deal, but keep in mind that I've run plenty of Ethanol ranging from E30 to E98 and never once had this issue - and it *just so happens* to occur that day? I don't buy it.
Methanol is less energy dense than ethanol and has a different flame front which (under heavy load) can result in some nasty cylinder pressure spikes or unexpected variance, reduces MPG, reduces total power output, and may increase EGT's if your car runs rich to compensate the fuel targets not matching requested torque load depending on how you're tuned.
That all can damage fuel lines, o-rings, vapors can damage EVAP components, and the rich condition destroys your catalytic converter. Methanol is significantly more corrosive than ethanol. Neither is great, but it's certainly a factor in why you should not run meth in your gas tank.
So I checked all of this. My EGT's spiked in logs higher than normal, I seem to be running rich (more soot in the tailpipe than normal), and without a dyno I can't definitively say I've lost power, but I definitely felt "something" was amiss.
I've almost run the tank empty, and I won't be coming back here. Stick with stations like Shell or Chevron. Yeah the E% is lower there so just supplement it with race gas if you're that determined to get up to E85 (but in all truth, the benefits of Ethanol taper off heavily around 60%, so I don't know why you would).
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