MT90 is what I picked up. GL-4 and is comparable to 40w motor oil (per the package label) MTL is comparable to 30w

Royal Purple has no GL rating at all, and at $15 per qt, someone with deeper pockets than I will have to beta test it

Sta-Lube is made by CRC, but I didnt go over to Napa to check it out

On a different note, when the SRT-4 needs a fluid change, I'm hearing good things about Royal Purple. On cold days the ATF4 lets the 1-2 upshift crunch a little till things get warmed up- I dont like that

As far as feeling the gears engage, my Ford pickup does that and it is very good to know the 833 can do it too