Originally Posted by Joe Os
Which one the best to run? nigh or day?
All plugs are different. If your asking for which heat range is best , then someone already answered that. Not sure if its correct but otherwise I find glow-plugs you just gotta play with and see the results for yourself.
Mainly what you have at your lhs is what you get to choose from and you go from there. I do order some plugs but only for specific reasons and or when I found a plug I personally like.
Plugs are just like fuel and anything else. Its what you can get and what you like , what runs well with your motor etc.