07-09-2017, 07:53 PM
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