Has anyone used AMSOIL Synthetic Motorcycle Oil in there bike? I'm hearing good things about this and my friend says he uses it and it actually cools his bikes overall operating temperatures down when he races at the track.

What do you think?

All I've heard is that is the best! Bar-none! Also a bit expensive. I've been using Valvoline Full Synthetic 20W-50 for the past 3 years in my GSXR and so far I love it.

It can be expensive, but you do pay for what you get. I've heard that Valvoline Full Synthetic is pretty good, never usde it. Have used Mobil 1 until switching to amsoil. The overall package of amsoil, makes it worth the extra $1.00 or so. I really like the fact its made in america and its free from foreign oil ties... You won't find that with any other oil out there.

I have been using synthetic in my Harley fo close to 20 years,love it,blew a gasket recently,still got hone marks when I took the heads off on bores 15 year old bike, my bike was the only one running when I was in Arizna years ago,the rest with Harley iol shut down with the heat