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+--- Thread: NGK spark plugs (/showthread.php?tid=209)
NGK spark plugs - richard tatton - 07-09-2017
The spark plugs I changed today were NGK6. I was about to replace with some labelled NGK7 but wasn't sure if they were ok as the number was different. I played safe and replaced with a new set of NGK6 but just wondered if I can use the NGK7 in a 1934 box saloon or would they be wrong. I'm not sure where they came from but I've been carrying them around under the back seat for years! Thanks Richard
RE: NGK spark plugs - Peter Clayton - 07-09-2017
The 7 is a cooler running plug so may oil up, however would be a good spare. This site gives some interesting info http://www.briskusa.com/spark_plug_cross_reference_heat_range_chart