I'm not sure about those particular brands, but several of us are using Valvoline SynPower semi-synthetic PS fluid with good results. It costs around $4 a quart. I used cheap PS fluid to first flush out the old fluid via the "turkey baster" method, and then finished up with the more expensive SynPower. It takes many flushes to see an improvement of clearer fluid, but the results were good for me.
- Mike