why "good info" because you authored it??
:D
jk, as stated "good info" thanks
yes 230-40 is good but it depends on many factors. I have just had good luck with lasting glow plugs when my temps stay below water boiling temps (212*) It seems that when I run above that my GP's burn out and...
I just use the cheapest one sold and buy a bulk, in my case it's an N3 and N4 which are hot plugs. I do not try to get scientific about it. If the plug I choose runs to my satisfaction and temps stay below 210 I run it. Also the manufacturer of the engine will give you a baseline of which plug...