When involved in xon gas stations, I heard the argument from several company sources that brands without a dedicated fleet could be using their stainless tankers for all sorts of loads... "just a cup of acid will change the whole load". IDK if there is any truth there, but I heard it enough.This is scary in the fact that if you use the car to take a trip and use gas from different refineries, tank farms, retailers. What kind of deadly mixture is brewing
Had to look it up "Your Market May Vary"... too true. I can't claim anyone is wrong if they have success. I would caution the additive crowd that they really never know if their mix causes long term damage... Just as the ethanol fuels cause long term damage.I'm just gonna say this and i'll surely be told that I'm wrong..
I just finished driving a dead-nuts original '79 Magnun (318-2) in a two mile parade. It took roughly an hour, so 1/2 mph. Car didn't do a single thing wrong, then I ate lunch with the family of the Navy vet who rode with me. (aka heat soak) Then I drove it home without incident. Only in the middle of the parade did I remember I was running on the last 1/4 tank of the 87 oct. cheap gas (probably from our local Kroger) that was in it when I garaged it 8 months ago.
Basically repeat the same story for my '70 Fury (sans parade).
Same thing with my Monaco, except I burn a lot more Kroger or Ghetto-brand gas. No electric fans, pumps, gadgets, additives, etc.
I don't do anything with my lawn equipment except run it dry on the last cut.
I don't think I've purchased more than a couple tanks of name-brand fuel in my life.
YMMV
If your market requires RFG (reformulated gasoline) it is an emissions mandate and pretty inescapable unless you cross county lines to a place without the mandate. Ethanol fuels are a part of this, but there are other things tried/used as well.
Reformulated Gasoline | US EPA
A Primer on Gasoline Blending - EPRINC
MTBE... a potential carcinogen
Methyl Tertiary Butyl Ether (MTBE) | US EPA
Emissions and climate could make a big difference in the fuels available and the issues caused. Winter blends have higher volatility and could cause vapor lock issues in hot weather. Summer blends with lower volatility maybe difficult to start in the cold weather.
I have had countless times a car had a issue that seemed to be fuel quality related. There are tests, but to do anything of meaning a fuel sample would have to be sent to a lab and that information used to try to get the supplier to pay for repairs. You also would have to show proof that they are where you purchased the bad fuel, which is almost impossible when a busy station gets a fresh truckload every day or two (the busiest I ever dealt with personally was twice a day on most days). This all adds up to a waste of effort and $$... I would reset adaptive memories, short drive the car and recommend switching gas stations to a "name brand" or a different "name brand" if they already used one... just for a couple of tankfuls. Without any repair to show for this, I did this gratis, and never had a customer return for a second complaint. Of course explaining to the customer the unwarrantable expense of testing, cleaning and replacing their fuel may have had something to do with their willingness to try a different station.
I believe Florida gets some "dumped" fuels from other markets... we are warm and without any emissions testing to cause many problems for suppliers doing this. With the pipeline system I wonder how often it is really done. I have occasionally dealt with wasted and corroded fuel injection systems... but you will never prove the cause.
I am happy with the 89 octane WAWA ethanol free I can buy conveniently, without dedicated tracking I believe the increase in fuel economy has offset the higher cost at least a bit. On the road, I will buy what I can find... but it will be burned off soon enough that I'm less concerned with long term effects.