my S2 33 gtst was getting 600ks per full tank before the light came on. Mods- 10psi, front mount, 3inch turbo back exhaust and a pod.
Put it in got new timing belt and bearings, and a service and now suddenly im getting 500kms max. Ecu is standard so not sure whats happened that with parts in bad need of replacement i was getting more kms.