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Join Date: Nov 2016
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First things first, the difference between 87 and 90 is never going to be the cause of an issue like this. 87 octane is perfectly fine for your car.
1) You got some gas that was contaminated with water.
2) Its just bad luck that the failure happened to coincide with filling up with gas, but the gas itself is not the cause.
You could try to siphon out the gas you put in it and get some fresh gas in there (87 is fine, but buy it somewhere else from another brand station!), not as easily done as said but its an idea. I think odds are better that its a normal part failure that just happened to go out after filling up.
Pretty sure the 2009 engines were famous for having short-life fuel pressure regulators, search around the forum for more info on that and see if the glove fits.