A friend of mine who's on the Stag list just forwarded this to me. I've
never heard of unleaded fuel damaging gaskets or seals before - I
thought I'd see if anyone else has. I know for a fact that all of the
suppliers say that the only thing you need to do to a Spitfire is get
hardened exhaust valve seats fitted, and maybe adjust the timing a bit.
>From: Julian Richardson
>Sent: 16 July 1999 14:56
>To: Dean Dashwood; Andy Crowne
>Subject: FW: Unleaded in Stag V8
>more on the ol' unleaded debate... no no, unleaded sounds like *such* a
>better alternative to leaded ;)
>Sent: 15 July 1999 21:33
>Subject: Unleaded in Stag V8
> I realize that most do not read all the e-mails posted on this
>subject, and UK Owners have some worries about using unleaded. We in the
>USA have been using unleaded since the '70's. Only valve I ever burnt out
>was on my '63 Herald, although I did manage to find leaded premium for my
>TR250 until 1980. Like Tony Hart says, most Stags were built with the
>hardened seats and exhaust valves regardless of market, excepting very early
>models. I feel UK owners are worrying unduly.
>The problem you will all find is that the additives in unleaded will eat your
>gaskets and seals that are exposed to unleaded fuel unless newer materials
>have been installed in the fuel system and engine. Especially be wary of
>oxygenated fuel additives like MTBE, TBTE, Methanol, and Ethanol. They all
>will eat your rubber based seals, gaskets and diaphragms, plus the emissions
>if not run through a catalist are toxic. So much for clean air? A long
>running argument among the enfironmentalists. Unleaded is designed for use
>in cars with catalists and that have additional emmission control computers
>to regulate the burn. There are hundreds of studies, just search the net.
>In My Not So Humble Opinion, Yours for Speculation ... bring it on ...
>Triumph Stag Register USA VP