[spidertri]

I put royal purple in my trans and ran it for 20k miles. When it came out it was the consistency of water and smelled like it had been burned.

I don't know how many miles were on the oil I drained out before the RP but it wasn't burned smelling and still seemed to have a good viscosity to it.

After I took the RP out I went to amsoil and have since put 20k on that and refilled it again with more amsoil. The 20k mile old stuff did not smell burned, came out almost new looking, and had the original consistency. Shifting is very smooth with the amsoil in there.

From my experience, I can't recommend royal purple to people. I didn't even autox when I had the RP in the trans, it was all daily driver miles.