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Spark plugs - non O.E.?

5029 Views 13 Replies 10 Participants Last post by  srmarti
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"
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Simply put, if this was true then all car makers would be using them. I am sure GM would love to get better MPG just by replacing the spark plugs with a cheaper part and get better MPG. Be warned about all claims of better hp, mpg and lower emissions by replacing a simple part!
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