Ok, time to report on the Mobil 1. After 17000 miles, shifting into 2nd and downshifting to 2nd had become about impossible. It has been bad for about the last 2000 miles. IDK if maybe the level was a little low, or if the stuff just stopped performing. I don't see any trans leaks and when I emptied it today, it looks like a good 3 quarts came out of it, so I just wonder about the fluid.
In the cold the Mobil 1 is definitely stiff, but my drive has me cruse a few miles without shifting a lot, so it warmed up pretty quickly for me.
Nonetheless, the stuff had to go, Lately, I always had to baby shifts into 2nd, and downshifts became a grind. So I switched to Penzoil Syncromesh today, after considering the posts above.
WOW! Instant smooth 2nd whether hard on the throttle or downshifting. I hate to blame the Mobil 1, maybe my level was a little down? All I know is next time I have any trouble I will pull the speedo gear and check that level.
For now, I'm considering the Penzoil the difference. Let's see if I can get more than 15k out of this stuff.