Posted by jdemaris on September 29, 2013 at 17:49:06 from (70.215.8.81):
In Reply to: GL-1 Question posted by maxwell99 on September 28, 2013 at 06:32:59:
The additives in GL4 and GL5 oils, that GL1 lacks . . . don't just protect flat-tappet cam lobes and lifters. They also help protect hypoid gears by coating them with a sacrificial metal. GL4 or GL5 gives better metal-wear protection then GL1.
I doubt anyone can come up with a legitimate reason to use GL1 in a TO35 other then concerns of being "yellow metal safe." That being said, there are modern GL5s that ARE yellow-metal-safe.
If someone is privy to some other obscure reason for GL1 only in a TO35 - I'd like to hear it. GL1 90W is basically the same as 30W or 40W SAE non-degertent SAE motor-oil. No additives and inferior metal wear protection as compared to GL4 and GL5. GL1 is the safest though when there is true concern for corrosion in brass or copper parts, or when wet brakes are involved. Wet brakes can plug from additives, but how many machines have them? Oliver HGs, OC3s, Terratracs and a few Case 310 crawlers?
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