How much do you consider acceptable ? With respect to the frequent discussions on how well/poorly the heavier weight oils protect, and the oft quoted oil consumption figures with the lighter weights........ How much oil does your car use ? With what weight oils ? 4Runner Not detectable over 12,000km 5W-40 (syn) Camira Not detectable over 8,000km 15W-40 (dino) Biggest oil burner I had was a v-8 (253) Kingswood that had travelled 180,000km, 120,000 without a thermostat. It got to 2 litres per 5,000km. And I retired it. Otherwise, most of the vehicles I've been involved with have consumed less than half a litre per 10,000km, with 10,000km changes of 20W-50 Castrol or Valvoline.