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There's an english sds from 2012 that says 75 - 80% and a foreign sds from 2021 that says 70 - 90% of PEA (oxirane 220795-29-9). It looks like redline si-1 fuel system cleaner uses a different PEA in half the concentration but twice the size, and is a little cheaper if I don't want to drive to...

My dealer sells it for $20, is that a good price for that amount of PEA?