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petrol

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cherokeegraham:
I've been told that it's ok to run the series 2a on regular unleaded, is this right or should I use an additive?

Canada Al:
A standard 2 1/4 petrol is not designed for unleaded fuel . you can run this engine on unleaded but eventually you will burn the valve seats . you can use an additive or run one tank out of four with leaded petrol .
Alternatively you could fit hardend valve seats when you next have the head off .

Robbo:
I agree with Al, but that said if you only do about a 1000 ayear it'll be ok for your retirement, but that said I'd go with unleaded and use the additives rather than super which seems to run a little lumpy sometimes...

yours currently switching from super to ordinary, 31 year block with unleaded head.

muddyweb:
Main thing for running on unleaded is to make sure your ignition timing is right for the grade of unleaded you run.

I can't remember off the top of my head, but I'll dig out the various timings for the engine (unless someone has them to hand :-))

As said, unless you are doing loads of miles, don't rush out and get an unleaded head conversion for it..   Run it on unleaded until you have problems...   I haven't had any issues yet, even without additives.

cherokeegraham:
Cheers guys. Muddyweb, that would be really usefull, thanks.

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