Yep, I've determined MT-90 is cheaper than using 10w-30 in your AX15 manual transmission. Overall it will last longer and save you $$ Here's a video I made on the specifics as to why. https://youtu.be/oOPTCCbRVCg I know 10w-30 is a popular choice for the AX15, and I'm not saying there is anything wrong with that choice. I just believe MT-90 is a better choice. Do you agree? Thanks for the feedback.