Quote:
Originally Posted by ShaneN
This is going the exact opposite way of the original post. The ethanol in the gas is BETTER for boosted cars. Hence why they run e85...
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You completely missed my point. It appears some US gas stations across the border are "mixing" their own fuels so you have no idea if you're getting what the pump actually says. When I was at Silk Cat we had the same issues with Jaguar owners and US gas (many vehicles had running problems because of excess water in the fuel and a few had to get towed literally 10 minutes after filling).
I'm not sure if they were trying to sell water contaminated fuel by adding in excessive alcohol to absorb the water or trying to save money by mixing. Regardless, there's NO WAY you should go fill up with 92 octane gas and find out it's got 20% ethanol in it when the pump had no indication there was any ethanol added.
This is not to say ALL US gas is bad, but I've seen a lot of cars that fuel up right across the border that have had issues. Enough to make me think there are more than a few scammers operating over there.
It would make sense to me to tune your car to run on the gas we have available here.
BTW, BMW's do not like excessive alcohol. It's one of the most common things we test for when there are drivability issues with cars.