Amsoil in Mass??

[BassGin3]

Since mobil 1 red cap is gone, I've been searching for something good to switch to. I'm thinking Amsoil synthetic 10w-40 motorcycle oil for winter and Amsoil synthetic 20w-50 motorcycle oil for summer. Does anyone change between these two for the summer and winter? Also, where can I get Amsoil around northern Mass or southern NH?

[cals400ex]

i can get it at a local dealership here. they may have to order it. i actually run the heavier weight in both summer and winter. a few of the engine builders say to do this on the built engines. for a stock ex, i think 10-40 would be just fine, especially in winter.