i've read my text books and online sources, but i still don't know how to read a spark plug properly.
hope you can help me out by explaining when does one need a 'cold' or 'hot' plug.
provided are pics of my current set of plugs which are the (apparently) proton original NGK BK5E. it's been used on my 4G93P putra for i think a little over 100000 km already.
was thinking if current engine mods would force me to go for a colder plug since engine heat should have...
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