i been using QS 4x4 for 3 years now and i kind of like it, i have less oil consumption on my 95 passport. Thinking about switching over to motorcraft or havoline since they are cheaper. I just bought a crap load of QS 4x4 from kragen when they had it on sale, but now that its all gone, i dont see any reason for my to stick with a $3 a quart for this oil. Hear a lot of good stuff about motorcraft blend and its only $2 a quart from walmart, so imma give it a try and see how that goes.