Paul Brand: Oxygenated fuel additives sacrifice mileage

Not exactly what you were looking for, but being born and bread in Mpls, found it interesting. Plus Paul Brand has a great show on AM-1500.

I've used it in my 560SEL and have noticed no difference. Here in WI, the stations which sell MTBE blends have labeled pumps, but nozzles are the same.

Now that I think of it, I've used it in my 10.25:1, 472 cubey Cadillac with no ill effects.