Originally Posted by
Simmsled
Just being devils advocate on the Vanos seals... My 04 has 58k miles on it and has had BMW 5w30 every 5 to 6k (or once per year if didn't reach mileage) religiously.
Changed out the seals for $65 shipped from Beisan while doing the VCG, (no rattles, so no rattle kit) and I have noticed a great improvement in low end torque.
I do a mix of about 50/50 city/highway and I'd swear that I've even seen a 1.5 mpg increase. My route/gas/tire pressure/etc... none of it has changed.
For $65, and since you're already going to have it apart... seems like some low hanging fruit IMHO.