Again: Unleaded or leaded fuel for mid 70's /6?

str12-340 said

Now the next question is... does the OP's gas have ethanol in it???

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I'm a bit confused about what I've read, but I think standard gas (95 or 98 ROZ; called Super 95 or Super 98) can contain up to 5% ethanol. There's also another type of gas, Super 95 E10 or Super 98 E10, with 10% Ethanol.