I use Amsoil.. it has given me great results in my cars so I figured why not try it on the Busa too. Plus I'll go a full season without having to change it.
I guess I'm the odd man out. I only use honda 10w 40. No synthetic here. I change it a little more often. I don't like the fact that once you go synthetic you can never go back.
If you look at the composition of both you will see very little difference. So you try it. I have not seen any difference in running the 15w50. If I felt just the least bit of benifit using the Mx4T I would continue to use it.
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