Bicster

Around here all the pumps have 87, 90, and 93. I know I've seen (95? 96?) at some Sunoco stations in the northeast. I figured 93 was obtainable just about anywhere. Obviously I don't take many extended road trips. I guess it would be good to keep the AP with the car in case there is a fuel availability 'emergency' ... It's good to know the 93 map works properly with 93 fuel, though.

I've been wondering if it's a bad idea to run the 93 octane map on 93 octane fuel. I've never seen octane numbers higher than 93 in Texas, and I don't want to fool around with fuel additives. Do most people run a map rated for a lower octane fuel than what they put in the car? When I had my Passat chipped, the tuner emphatically told me that it required 93 octane fuel ... which I fed it, and never it had any detonation or performance issues. But I have no idea what octane rating his maps were for...

The boost is controlled by the computer. The chip will alter fuel, timing, and boost. It'll run leaner than stock.