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ur-q 10v on unleaded?

In message <347DD17E.149D4618@nh.ultranet.com> Huw Powell writes:

>> The only issue becomes the use of unleaded fuel in a car without a 
>> catalytic >converter.

> Huh?  The problem would be the converse (?) - using leaded in a cat
> equipped vehicle ruins the catalyst.

No.  Well, yes - of course.
But unleaded fuel is designed to be used in vehicles that can catalyse many of 
the combustion products.  APN emission, especially benzene, is a serious 
problem.  If you use unleaded fuel in a vehicle _without_ a catalytic 
converter, more of these products escape into the environment.  See Roger 
Perry's work at Imperial College, London.

 Phil Payne
 Committee Member, UK Audi [ur-]quattro Owners Club