MPMB
Well-Known Member
The 2021 owner's manual says 100k.So after reading all nine pages I’m left wondering when should you, as a matter of good routine maintenance, change the spark plugs and coils?
And as for the guy who was hating on Penske they just won the 24 Hours of Daytona in a Porsche!,
I would say that's optimal timeframe. I'm in "testing" mode, as I only replaced the right bank when I replaced the cam and rockers. Left side is original.
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:p ^/s, btw