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MG MGB Technical - Lead substatute?

I have a 1968 B RD and i understand that they take leadded gas but hear in california we don't have leadded gas so how often am i suposed to use leadded gas?

Thanks
Scot
Scot Hamm

With every fill-up - or else you will wear-out the valve seats prematurely.

Small bottles of lead substitute can be had at local auto parts stores (Pep Boys, Trak Auto, etc.) and
sometimes you can find them at a 99¢ Store or a high performance shop.
Daniel Wong

There is a body of opinion that says that an engine that has run at least 40k on leaded and not had the valves replaced or seats recut will have enough lead left in the faces (the so-called 'lead-memory effect') to last the 'natural life of the engine' (what ever that is). Usage is also a factor, long, high-speed and heavy-load running is more likely to cause recession (funnily enough) than light usage.
Paul Hunt

I don't own any modern (made for unleaded fuel) cars and I live where foo-foo " motor fuel " (NOT gasoline!)
is the only thing available - I drive all my vehicles very hard and have only had _one_ problem with valve seat recessing - that on a 1960 Austin A-55 with the 1500 head on it .

Just drive and forget all the additive stuff - it's $$ down the drain . if you ever recess a valve seat , it needed a valve job anyway , change all the seats , exhaust valves and guides too - continue driving as before .

-Nate
Nate

This thread was discussed between 27/01/2002 and 28/01/2002

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