I read through that test and though Royal Purple didn't do as well in some tests it was a good performer in other tests. Some of the tests are designed to detect potential shear breakdown of conventional oil which is much less of a problem for synthetic oils.I read a gear oil review that compared like 30 gear oils, and royal purple was one of the worst actually. Go figure.
I'm sure it's a "test" paid for by Amsoil. If you notice, Mobil1 was "second" and it's significantly cheaper and far more available. Plus, you don't have to buy it in some Amway like pyramid scheme.I read through that test and though Royal Purple didn't do as well in some tests it was a good performer in other tests. Some of the tests are designed to detect potential shear breakdown of conventional oil which is much less of a problem for synthetic oils.
Having said that, the Amsoil seemed to do well in all the tests. I should research this further for my upcoming gear lube change.
Well said. I'm not sure if I'm loyal or not: Mobil 1 in the engine, Amsoil in the transmission, and Redline in the transfer case and diffs.I think that sometimes we over pamper our trucks. I have seen vehicles in some of the undeveloped countries that spend their whole life without a change of the gear oil and nothing happens to their transmissions or gears, and some are 4x4s used daily in some of the worst conditions. In some of these places they have no idea or they cannot afford these expensive oils, and the vehicles get used and abused daily. We forget that Land Cruisers were designed originally to be used in some of the worsts environments. However we do what we can to make our vehicles to last way beyond their expected life and I believe that regardless it is Mobil One, Amsoil, Royal Purple, etc. all these oils are good enough to get the job done, it is a matter of our personal taste and loyalty to certain brands. Like Cruisedrew said, all you want is fresh, clean oil.
Actually I use that stuff because I don't change it very often. 2 years on engine oil (waaaay less than 10k miles in 2 years) and I may never change the transmission or diffs again as I just don't put the miles on the LC.amen. all those using royal purple/amsoil are so anal they are going to change it often anyway.
I change it with Royal Purple now and maybe 5-7 years from now (if I haven't sold the truck or go under water) so I don't think its being anal, its saving money on the long run. I pay $8.00 for a bottle of Royal Purple vs the regular stuff around 3-4 bucks that's going to be changed often... once a year? Do the math.amen. all those using royal purple/amsoil are so anal they are going to change it often anyway.