I couldn't agree with WS6 more! I've used Amziol since I was 9 years old in my first Vehicls. A 1973 Harley Davidson Shortster, and in my Snowmobile. (my parents are distributors)

Synythetics have come a long way. Amzoil is the oldest, and has done more R&D than any of the "new" synthetic guys, and are always on top with any cross compairisons. see link:
http://www.hoigto.com/motoroil.htm

I have a 73 GMC stepside with a small 307. When I bought it, they told me they were concerend on how long the engine and tranny would last. I switched to Amzoil in both, (power, gas milage, and drivability all went up) and they both lasted over 20 more years of service! Until my nephew ran it dry on tranny fluid and oil... tranny died, but the motor still runs! Not great but runs!)

I too have amzoil in our two light weight Harleys, the 97 Blazer, the 73 GMC, the 67 Firebird, the 66 Mustang, the 61 Bug etc...

It works for me! - Brett - 67 Drop Top 455!