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Those with heads without hardened valve seats might want to check out
this URL, which describes tests performed by a well respected research
organisation on lead substitutes. The test was performed on an 'A'
series engine.
4 definitely worked, Many apparently did not. Not all mixtures may be
available here, since the test was performed in the UK.
If the URL does not work -- go to http://www.telegraph.co.uk . Click on
'features' and then 'motoring'. You may need to create a login to access
it, but this is easy and free.
Simon
http://www.telegraph.co.uk/et?ac=000111402945838&rtmo=VZluwGPx&atmo=99999999&pg=/et/99/4/3/emled03.html
>
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