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Spark plug recommendation please.

Posted: Sat Nov 09, 2013 5:03 pm
by cswagon
Hello
I have a bog standard Range Rover Classic with a 4.2 engine which I run on lpg. Could you good people recommend a good plug and gap for my needs please?
At present I use NGK BPR6ES but don't know whether this is suitable with gas.
I also run it at 12 degrees BTDC. Is this also okay please?
Many thanks
Graham.