Hmmmmm.
Seems to be turning into an oil thread.
Personally, I use Mystic JT8 15-40 in the Kubby, the Massey, the Lincoln gas welder, the 350 Ford Powersmoke, the MTD lawn tractor and my portable generator.
My Tracker and my wife's Ranger get Motorcraft 5-30 Synthetic Blend.
I use Amsoil 20-50 in my Triumph, 5-30 in my standby genset.
I use Mobil Rarus VG100 compressor oil in my recropricating compressors, Shell Spirax 85-140 in my diff's and gear boxes and Shell Donax spindle oil in my lathes and milling machines, Harig high film strength way oil on my slideways, Valenite VNT700 full synthetic in my flood coolant units and Mobil full synthetic high temperature grease in my bulk greaser.
I think that covers it all with the exception of the Marvel Mystery Oil that I squirt in my air tools on ocassion and wipe my machines down too. I forgot, a couple of cans of PB Blaster for the stubborn nut. /forums/images/graemlins/grin.gif