[TR] GL4 vs GL5 Gear oils

[Chad]

Funny.  I've seen GL-5 spec oils with warnings on them....not to be used with yellow metals.
Chad in Tulsa

On Tuesday, June 6, 2017, 1:18:24 AM CDT, Jim Vassiliadis <jimstr4 at gmail.com> wrote:

 I was reading the recent discussion about gearbox oils and found Macys:www.macysgarage.com/myweb6/gear_lube.htm Apparently it's a myth re GL4 oils not damaging yellow metals and GL5 oils damaging them.Sounds like it's a bit random as the what contains the sulfur compounds that stain the yellow metals.  GL4 oils don't have the EP value to withstand shock loading.They recommend a GL5.Don't take my word for it read the article. Jim and the 62 TR4 
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