With JasonC's post about the $13 MIR (unlimited purchases 'til 4/15) I had to drain the brand new Amsoil in my Nissan and try it. (I carefully drained it into a CLEAN pan and I am going to reuse it of course). The G-Oil, though you can't really judge by feel, is just as smooth as any other oil I have ran so far which is about every major syn except Valvoline Synpower. I really think if you want to try this stuff and you have a vehicle that calls for 5w30 it is worth the try. I will do a UOA to see how it performs, but while it is cheap and cuts the use of foreign oil I think it is worth every penny.