YetAnotherA4

http://www.prime-mover.org/Engines/GArticles/octane.html

http://www.motorcycle.com/mo/mcnuts/fuelron.html

Heychoiboy

There is a local gas station that sells 100 octane fuel, I have an A4 3.0 Quattro, will it damage my engine in any way?

dA4banger.au

because firstly, your engine has knock sensors and should adapt itself to the different RON rating, secondly, your 3.0 litre engine is designed for high octane fuel (98 RON) anyway, and thirdly, the higher the octane rating the less chance for knocking. There would've been a worry if you went on a too low octane fuel.

YetAnotherA4

which contains lead. It'll screw your catalytic coverter and lambda sensor, big $$$ to repair. Know of people with WRX's that have used this fuel and had these problems.

It's not the octane rating, it's the fact it contains lead and is a nasty fuel.

mmccall

leads not nasty it just contaminates the cats

NoOneTTZ

It will kill an 02 sensor in record time, the o2's will most likely be damaged so badly the engine won't run well enough to get you anywhere to damage the cats.

Heychoiboy

I'll have to check, It's a 76 gas station in california, I passed it on my way to work.

NoOneTTZ

Its easy to check, just try putting the filler nozzle in the tank, leaded filler nozzles don't fit unleaded filler tubes.