I've read that air tool oil is the same as sewing machine oil and that sewing machine oil works well in the SU carbs. Going to try and adjust mine this weekend and am gathering up all the stuff I'll need. Has anybody tried using that stuff or should I just buy fork oil from a bike shop, I've got about 2 qts. of tool oil already and we only have 1 motorcycle shop in town and they are higher than a giraffes butt.

SAE 20 http://www.grainger.com/Grainger/STANLEY-BOSTITCH-Air-Tool-Oil-3RCY9

Edited March 8, 201312 yr by siteunseen

3 n 1 oil is about 20 wt oil, and cheap. Have used it for years.

I've read that air tool oil is the same as sewing machine oil and that sewing machine oil works well in the SU carbs. Going to try and adjust mine this weekend and am gathering up all the stuff I'll need. Has anybody tried using that stuff or should I just buy fork oil from a bike shop, I've got about 2 qts. of tool oil already and we only have 1 motorcycle shop in town and they are higher than a giraffes butt.

SAE 20 STANLEY BOSTITCH Air Tool Oil, 20 oz, SAE 20 - Oils - 3RCY9|Premoil-20OZ - Grainger Industrial Supply

My local motorcycle shop gives me free halfies when they clean out their shop. They give me all sorts of weights so I can mix and experiment,. Nice folks.

Still trying to find a good balance though. My carbs don't seem to like the things a lot of others recommend.

My favorite straight 20wt oil for the carbs is 'John Deere Hydrostatic Transmission Fluid', no additives.

Bonzi Lon

I used 3 n 1 when I was running SU's......worked dead on.

I used 3 n 1 when I was running SU's......worked dead on.

I used 3 n 1 when I was running SU's......worked dead on.

I used to run motorcycle fork oil in mine 'back in the day' worked fine. It was also 20wt.

3-in-1 is also available in places like Wal-Mart and Ace Hardware. It's easy to get, and it works just fine.

3-in-1 (blue) like others have mentioned. I have been told that Marvel Mystery Oil works as well.

I've used shock oil for RC cars, found at local Hobby Shops, comes in different types, worked well.

I've put 15w40 in it now, but feel it is very heavy to lift the pistons up. The car revs and pulls fine however. I think it's best to put a lighter oil like sae30 that says in the fsm ?