I asked about using the Gold Cap on the Mobil 1 website and here is the response that I got. The Mobil 1 Extended Performance can not be used in a motorcycle for it can cause clutch slippage. The MX4T in dallas can only be found at Autozones. I would recommend checking with other locations. By the way, all the AutoZones around here, or at least the ones I checked with, have stopped carrying the MX4T and you can't special order it. I bought 12 bottles yesterday from an AutoZone that was clearing the shelves. Not sure if I should take it back and get some AMSOIL, Redline, etc. I thought I'd go with MX4T because it is "easy to find". Guess not.