Hi guys,

This is probably really obvious but just wondering what colour the plugs should look on my 5 litre which spends most of its time on gas. It doesn't have any performance or economy issues compared to running on petrol(It is a slug on both!! But it is cheap to run!!). I am just curious as i was always told they should be a nice chocolate colour on petrol but I wasnt sure if gas should be the same. They looked white when I took them out.

Thanks in advance

Fitter

They are reading just fine when white . The white is due to the higher temp they are subjected to.
Peter

Cool thanks for that. I was a little worried it was running lean.
Fitter