virginoil: Does Toyota/Australia have an official oil chart for the various engines (by model year). If so, could you please post it. For those of us who own Toyota vehicles that are beyond the warranty mileage, it would be beneficial to know what viscosity ranges Toyota states are acceptable for their engines. If we had access to this information, we would have Canada, U.S. & Australia's information, and we could choose for ourselves, based on a more complete picture of what the manufacturer of our vehicular engines states is recommended, bsed at least in part on climate and temperature.