Ok without starting a war on here, is there a good 60 or 70 wt Synthetic oil that is good with shovels? All oil thins out under heat but some say synthetics maintain their viscosity far better than dino oil. How much better, 10, 20....40 percent better? I was using redline 20w50 synthetic in my 65 ironhead once and I didn't see any difference. It got just as hot and thin as regular oil.

My shovel runs 200+ deg. with Ultima 60 dino up here in Ontario Canada in the summer months most of the time and I hear 250 deg. is the upper limit for those oils. Will synthetics stay, dare I say "thicker", and how much thicker in heat?

randy

 

the war you speek of its because mobil lost a law suit to castrol - today they can blend anything into oil and or use 1 /2 of one percent or less and call it a syn blend like its 50 percent - its official name is dyster stock 3 it is nothing more then a new way to refine older tyoe oil and then you can call it syn

60 W ultima dyno oil has an ample supply of zinc - most syn oil does not - now mobil 15 / 50 syn does as well as their 10 / 40 syn oil - zinc has been found to screw with the cats on cars so its all but gone today

i only use it in the restore high dollar collectables we restore and or sell as i have 50 - 60 and the 70 in stock and use it in shovels - pans - knuckels - flatheads - ironheads - and the earlier J series motorbikes -

if you put an oil cooler on your bike it will drop 20 / 30 deg in oil temps / then in the fall put a cover over the cooler but when we asked we were told the oil max working temp was 325 and you can fry an egg if its that hot