I've used the T5 for the last 10,000 miles. It works fine, shifting is fine, but I've never been able to get into the shifting difficultys a lot of guys have. I just prefer to stay 10W30 as that's what's called for and the Rotella is easily purchased at Walmart. Quite a few oil analysis on Bob is the oil guy and it's pretty evident the 5W40 T6 shears quickly, so those wanting the "40" part, it's "30" then "20" pretty quickly.
2008 GL1800, 2017 Yamaha Super Tenere 1200ES