I agree with Dutch. OEM's do a lot of research analyzing all engine operating parameters and choose a plug that is the best fit overall. Staying with OEM has worked best for me over the years. Different plug manufacturers' heat range characteristics are not EXACTLY the same across brands. I would stay with the iridium plugs however.
Spark plugs - non O.E.?
Has anyone experimented with non-OE (i.e. non-Iridium) plugs in our ICEs?
It has been a long standing argument among the VW community (cars in the 2000s and newer generations) that you get (significantly?) better fuel economy with Copper plugs over Iridium at the cost of the plugs wearing out 2-3x faster.
At present I drive a lot of ICE miles, so I'd be willing to Guinea pig myself if I can determine what plugs are "compatible"
It has been a long standing argument among the VW community (cars in the 2000s and newer generations) that you get (significantly?) better fuel economy with Copper plugs over Iridium at the cost of the plugs wearing out 2-3x faster.
At present I drive a lot of ICE miles, so I'd be willing to Guinea pig myself if I can determine what plugs are "compatible"
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