Friend of mine is due to replace his power steering fluid, and I recommended ARX to clean things up a bit. He isn't willing to pay the price for it, however. Having said that, he's asking if MMO be any good in the power steering system as an alternative. I said I didn't know. There's no mentioning of it on their website, but they do recommend it for automatic transmissions. Personally, I'd rather use ARX...but under these circumstances, it's not my car or funds to make a decision. Has anybody used it in power steering applications? Any recommendations? Thanks!