Re: What Gas to use?

[quk@isham-research.demon.co.uk (Phil Payne)]

In message <199909040446.EAA14058@smtp.amb.org> ti@amb.org (Ti Kan) writes:

> Your 4KQ has a medium compression engine and does not have knock sensors,
> so you do not lose performance by using 87 octane gas.  However, premium
> gas typically also contain certain fuel additives that may be beneficial
> in keeping injectors clean and prevent carbon buildup on valves.
> For example, Chevron's Techron.

Just an appropriate moment for me to chip in with the comment (for
European listers) that US and European 'octane' ratings are different.

Europe uses RON (Research Octane Number) and the US uses the arithmetic
mean of RON and the Motor Octane Number.  The latter is always lower
for any given fuel - sometimes very much lower.  So US octane numbers
can't easily be compared with European ones - Ti's '87' is probably
close to a European '92'.

At present, most places in Europe have 98 RON and 95 RON unleaded and
some have 97 RON leaded.

--
 Phil Payne
 UK Audi quattro Owners Club
 Phone: 0385 302803   Fax: 0870 0883933