Re: Synthetic Fluids
I use Royal Purple in most everything I own except never in differentials or manual transmissions, for some reason Royal Purple seems to need to heat up before it will let the synchros fully engage on manual transmission so for those I only use Redline. Amsoil is also a good synthetic but Royal Purple is not only a synthetic but it also has high levels of Zinc.... I know because I was having problems with turbos on one of my motors and I had a lab do a chemical breakdown of my oil to look for mineral and metal deposits.
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