I agree entirely with Mike. You may get slightly better performance from
Super unleaded (as the octane / RON rating) is higher than the standard
Unleaded. The price increase however may not be worth the extra performance.

Mark

>-- Original Message --
>To: "'1302@...'" <1302@...>
>From: Mike Knight <mknight@...>
>Date: Mon, 24 Nov 2003 13:50:02 -0000
>Subject: RE: [1302 eGroup] help with fuel please?
>Reply-To: 1302@...
>
>
>Just use unleaded. You will get valve seat precession over a long long
time, but frankly I have been putting unleaded into my VW's over the past
25
years without any discernable problems.



The issue with unleaded is this: the small amounts of
>lead tetraethyl in the
petrol put there for anti-knock - explosions - also had a secondary role
by
leaving metallic metal on the exhaust valve seats, this stopped the seat
being eroded by the hot gasses (precession). No leaded petrol = no lead
on

>alve seat. Whilst this might be an issue over some years on an E-Type
Jaguar or a turbo charged Celica Supra, frankly on your under stressed VW
engine with valves kept deliberately small, long valve stems etc you will
not see any immediate problem
>



Maybe you will have to renew the heads on the engine in about 100,000 miles
rather than 150,000 miles - but most of can live with that.



When you come to the end of 100,000 miles, you can get the engine rebuilt
with hardened valve sea
>s in the head, and it will then last for 150,000
miles. Of course you might be now driving a filigree pattern of rust :-)





-----Original Message-----
From: quisetcur [mailto:r.r.thompson@...]
Sent: 24 November 2003 13:23
To:
>302@...
Subject: [1302 eGroup] help with fuel please?



hi all
my daughter's partner has a 1972 beetle and needs to know
how to run it now that leaded fuel is totally unavailable
we'd be grateful for any info you have
thanks

>uisie






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