I have N52 2.5 engine. I do 5k oil changes, plugs might reach 50, i replaced at 40k, pretty much tips burnt off. Rear shocks were duff at 45k. 2 year brake fluid, done 5 year anti freeze. Replaced coils at 80k but old were fine, just precaution.
Gearbox oil at 50k manual box.
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