new Amsoil study on GL-5 gear lubes
#1
new Amsoil study on GL-5 gear lubes
Just wanted to mention that Amsoil just released a new study on GL-5 gear lubes that compares the performance of a large number of different brands of gear lubes. The study appears to independently run/audited and be very comprehensive. Amsoil includes their 75W-90 EP gear lube in the study, and while it doesn't win any of the tests, it consistently performed very well.
Both the 5-speed and 6-speed call out GL-4 oil, so the study is not directly relevant to the Evo, but its nonetheless a nice study worth reading. Now if Amsoil would just do the same with GL-4 oils.
Here is the page:
http://www.amsoil.com/products/gearl...hitePaper.aspx
Here is a direct PDF download link:
http://www.amsoil.com/lit/g2457.pdf
Both the 5-speed and 6-speed call out GL-4 oil, so the study is not directly relevant to the Evo, but its nonetheless a nice study worth reading. Now if Amsoil would just do the same with GL-4 oils.
Here is the page:
http://www.amsoil.com/products/gearl...hitePaper.aspx
Here is a direct PDF download link:
http://www.amsoil.com/lit/g2457.pdf
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one thing i can add is, royal purple is garbage in the cold.. i have had it my tranny for 2 months.. soon as it got cold it was a pain to switch gears for the first half an hour of driving.. overall even warm the tranny is notcier than any other oil i have tried..
i know i should have went wiith amsoil. hell i ran it in my banshee for 3 years, and the rings still looked perfect.
so if you live in the cold dont run royal purple. i have an 05 with less than 10000 miles on it.
i know i should have went wiith amsoil. hell i ran it in my banshee for 3 years, and the rings still looked perfect.
so if you live in the cold dont run royal purple. i have an 05 with less than 10000 miles on it.
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#9
I spoke to Amsoil yesterday afternoon. Their EP gear lube in the test also passes a MIL spec standard that requires compatibility with copper alloys (brass), so it can be used in the gearbox with no material compatibility issues, and its much more wear resistant than a GL-4 lube. There are no additives to assist in syncro action though, so the guy said shifting may be stiffer. I'll probably give it a try.
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very interesting to see that the stock Mobil 1 fluid came in 4th from last! this might help explain y it was easy for 03-04 evo spider gears to get chewed up once ppl turned up the wick.
when i changed my xfer case fluid at 5k miles, it had only 1/2 the amount of measured fluid it supposed to have had. either they didn't put much in for break-in, or it mysteriously burnt up due to heat.
once i changed all the fluids to royal purple, it ran waay smoother. Motul works even better & has the only fully synthetic gear oil, but since i'm not building a dedicated racecar, i don't think the extra cost is warranted.
when i changed my xfer case fluid at 5k miles, it had only 1/2 the amount of measured fluid it supposed to have had. either they didn't put much in for break-in, or it mysteriously burnt up due to heat.
once i changed all the fluids to royal purple, it ran waay smoother. Motul works even better & has the only fully synthetic gear oil, but since i'm not building a dedicated racecar, i don't think the extra cost is warranted.