I have used Mobil 1 High Mileage in two Land Rover Discovery Series II ('99 & "01), with great success. I now have a 2002 Toyota Land Crusier and will be using it as well for the same reasons: viscosity, protection, anti-wear. Unfortunately, other oil companies use creative advertising to try to earn my business. Case in point is Valvoline. Their website states their full synthetic high mileage motor oil is "Formulated with...40% more anti-wear film than Mobil 1*. .... *Based on anti-wear film generated in Cameron Plint Test, Valvoline Full Synthetic with MaxLife Technology™ 5W-30 vs Mobil 1 5W-30". Well, Valvoline is comparing their fully synthetic high mileage motor oil not to Mobil 1 High Mileage, but to standard Mobil 1. Why not compare apples to apples, or mention that the Valvoline oil flows slower in the centistokes test than Mobil 1 High Mileage? When you are the synthetic oil standard, you are a target, but this is just rediculous. Mobil 1 motor oil protected my engines, and Mobil 1 lubricants protected my differentials, transfer cases, all of it, for years. I trust it and it has never failed me. 'Nuff said.