"Blueskies" writes:

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Thanks Dave! Can 87 octane be mixed with ~93 octane to arrive at 90 octane? Seems like a lot of black magic (no pun
intended) in the oil business...



{please trim your quotes...}

We didn't {it was a Marketing function} but yes. Sunoco was the most
visible; their pump took both base [86 octane, ISTM] and high test & you
set the ratio before lifting the nozzle. Others did so in a less obvious
manner.

Most of the ''magic'' is marketing hype. It used to be "spot" gas [aka
noname] was dubious; maybe old, etc.. Since fuel injected cars took over;
IMHO 99.99% of gas is all the same, save the uniform on the attendent.

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