Looking for a good power steering fluid and I had samples of these fluids. By far the ATF+4 was thinnest at 0f. That's what I'm going to use. I'll use the Honda fluid for flushing and topping, only $3. The SynPower was only $3 for a quart and somewhat disappointing. ATF+4 should be low friction and good visc. The sample was Supertech.