Byron and Lee,
I almost hate to reply, for fear of starting an oil thread. So before we even get started, I'm not advocating any oil except the one you like best
As it happens, I use Schaeffer Oil. Lee, I think we've talked about this before, but it has micron moly as part of its blend, which I REALLY like. They make a number of products, so it's pretty easy to find just what you might want to use. For example: I use their 5/50 full synthetic racing oil in the Harley. Before settling on that, I did a number of heat tests on that air cooled engine, and found that I experienced a 14 degree oil temp drop over anything else I tried. But, for the sake of argument, that's just what worked for me, in my bike, and the way I ride (whew).
I used their 15/40 full synthetic in my BMW, my Yamaha FZ1, my V10 truck and my tractor. I use their #167 75/140 gear oil in the tranny and FD of the BMW and the tranny in the HD. And finally I used their 239S 30w in the primary of the HD, and 239S 10w in the manual transmission of my PU.
And here's the most interesting part: the racing oil is their most expensive oil I use, and it's (if memory serves) about $5.25 a quart, delivered to my house. The 9000 series 14/40 is about $4.60 a quart, delivered to my house.
I get oil sample kits from them for $9 each, which I keep around the shop, and just fill and mail (they pay postage).
All seems pretty simple to me, but again, not advocating anything to anyone. It's just what I'm using, and hey, you asked