I think first you need to get an operators manual for your tractor as it has the lube points in it & as for oils your local or close by oil distributor should have all the oils & grease you need or should.Oils usually come in 5 gal. bulk or 55 gal. drums. Also grease comes in buckets for the grease guns.Check your phone yellow pages for a lube dealer or Cat dealers sell oil products for your needs.
Final Drives and Transmission take 80-90 W gear Oil, and The engines take 30W Series 3 Straight weight oil. You can use 10W in the pony in winter for cold starts below 32 degrees. NO milti grade oils should be used in these machines. They were not yet invented when these tractors were being built, or if they were, they were not recomonded or engineered for it. Multi Grade oils tend to run too thin when the machine gets hot, where the straight weight oil doesn't. I recoment Cenex Superlube 518 for the 30W. Any 80-90 W will do for the rest.
Hope this helps
Chris
Engine oils normally can be purchased in cases of 1 gallon jugs----gear oils in 5 gallon buckets, or either in drums or bulk.
I recommend using the smaller containers even though it costs a little more---do to the ease of storage, handling and cleanliness. With a drum or bulk tank---you will be handling your oil with an oil pot that always seems to find some dirt, dust, etc.
In addition to your local fuel distributors----most top rate parts stores will carry brand name oils in the smaller containers. You might also check in with the local farm co-op in your area.
That's some mighty good advice coming from the old pro SJ on getting an operator's manual.
Good luck---
Delta Dirt
Go through the local yellow pages for oil product jobbers or distributors and pick a brand you like. For engine oil I use Chevron Delo 400--a commercial oil. You can get it in any weight and in quarts, gallons, fives or drums. I like Mobile Delvac better and used to use it but it no longer is available here and was all in 55 gal drums. I think Freightliner truck dealer shops have it also.
As for gear oils and greases, 5 gal pails are handy and easy to keep dry. If you are using a lot for a change job, there's grease drums--about 20 gallons-- available for a lot of the lube products.
Don't settle for just any gun grease. Always get an EP grease. It will stand more pressure and stay put at higher heat. Try to get one with a molybdinum di-sulfide (I think I got that right, moly grease anyway.) base. Best stuff I've found and Chevron has it if you yell enough. So did Mobile but they're not here anymore. Lithium based greases are good also.
Don't scrimp on quality. There's a lot of good petroleum products out there. And bear in mind this: If they do a lot of TV advertising they are spending on promotion instead of on quality! I wouldn't put Pensoil in a wheel barrow, but that's just my personal assessment.
Have fun,
Jack