Over here in the UK, standard unleaded is 95 octane and super unleaded is 98 octane. I've only put standard in my DeLorean so far, and HAVE had bucking problems, but traced it to a blocked fuel pickup filter. I have now butchered the "question-mark" shaped hose and inserted an in-line pickup filter, which as of last night when I drove 120 miles, works beautifully. (The reason I put in an in-line filter was because of how cheap and easy it is to get this particular filter (£6), compared to the inferior standard pickup filter.) To go back to the original point, 95 octane petrol works fine. I haven't tried super yet. The inertia switch SHOULD be located next to the bonnet release handle. I say SHOULD because mine's conspicuously absent... Martin #1458 Adam Price wrote: > My car also began bucking this morning for the first time. Fuel is > completely full and voltage levels normal. I put premium gas in it for the > first time since I;ve owned it. I know these engines are rated for 91 > octane, but premium is 92. Could this adversely affect the engine > performance? > > Where is the inertia switch? > > Adam