Guys, Just wondering if there is a standard retune period when you should take the car in to be retuned? I've had a solid 400+rwkw tune in my F6 now for about 2 years... its starting to idle a bit wobbly at startup and sometimes stalls when I'm pulling up my driveway and the revs drop down (auto). The tune still feels solid, my tuner says it shouldn't need a touch up tune, but I thought with engine wear etc over the years, the specs of the motor can change (small amounts) and thus the tune needs to be touched up to suit?