I have a 2001 Dodge Durango, with the 45RFE tranny. It calls for ATF+4 fluid, which I have always used in it. I recently brought it to a new mechanic for a fluid and filter change, and I found out that he put in a Multi-vehicle ATF. None of the multi-vehicle fluids I’ve seen cover ATF+4, and all the forums warn against using anything but ATF+4. When I complained to the owner, he produced a spec sheet that claims that it meets the Chrysler ATF+3 and ATF+4 OEM specs. The spec sheet is from a company called SC Fuels, but they just look like the bulk fluid distributor, not the manufacturer. The product is called “Performance 500 HiVis MVP ATF”. I found a “Performance 500” ATF, produced by General Petroleum (GP), but it does not make the same claims, nor does it have the same specs. I did find a Hi Vis MVP ATF made or distributed by Neo Synthetics: http://www.neosyntheticoil.com/atf-hi-vis-mvp/ The first two paragraphs in the description are identical to the spec sheet that the tech gave me, and the OEM specs covered are the same, and the test values are close, but not identical. I suspect that they are produced my the same manufacturer, but with a dufferent formulation. The Performance 500 HiVis MVP ATF specs that they put in my vehicle are: Gravity API 31.5, Flashpoint 425F, Pour Point -50F, Viscosity @-40C Brookfield 18,200, Viscosity @ 100C 7.3, Viscosity Index 190. The tech test drove it, and I drove it home (about 2 miles), but other than that, I’ve left it sitting in my driveway until I decide what to do. None of these brands are on the Chrysler list of licensed ATF+4 brands, so I am suspicious. Should I leave the fluid in there and just change it out at a shorter maintenance interval, or should I swap it out now? Does anyone have any opinion or experience with this stuff?