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hello my friends-

because most of you are pretty knowlegeable when it comes to engine maintenance, i would like to ask some questions in that regard.

how often should spark plugs get replaced on a 2000 GS400?

and is there a more robust after market spark plugs that i should consider?

thanks in advance

socalgs4

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I specially like the Bosch platinum +4 , but iridium is also good. I've heard that 100k is possible with these, as long as you use a fuel additive to keep plugs carbon free. I use Amsoil PI gas additive PI stands for performance improver, it makes a difference even in extra MPG's. :)

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