15W40 4T engine oil -unobtainium?

[Megadan]

Originally Posted by TheChairman

only in the most extreme cold or cold take-off situations do I feel a 5w would be of any benefit. It gets the oil moving quickly, and has very little to restrict it's flow as there is no filter. I'm ready to ditch the 5w in the bike now and just switch to 15w40 T6 across the board in all of my bikes, all seasons.

I would still recommend at least a 10W if you do plan on riding in temps in the 40's. The reason I prefer the 5W stuff in those temp ranges is due to the air cooled nature of the motor. They struggle to get up to and maintain temp while in motion, so the thinner oil is just some added insurance in that scenario.

As far as the T6 15w40. I agree with you, it is a damn good oil, even without the price being a factor. I have tested out a few different oils on my Hawks, and the 15w40 T6 has been the best oil I have run, hands down, to date on this bike. This is over Motul 7100 and other popular 4T motorcycle oils. My VFR on the other hand, really really loves Motul 7100.