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I asked 2 Porsche mechanics I know, trust and have used and a machine shop that builds race motors. All 3 said drain it and stick that fuel in the daily drivers. I have a gravity fuel pump, I'll put the car on the lift and raise it maybe 18" for good flow. Then replace the fuel filter just in case, put a few gallons known good 92, should be good to go - to the gas station for a fill up. Pisses me off that station had 87 in the 92 tank.
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