I looked through HPL's website and cant find much info on their range of GL-5 Gear oils. Is there TDS that HPL can share with us ?
HPL Differential Life
- Thread starter alcyon
- Start date
What exactly are you looking for? Here’s some below along with some competitors:
- Joined
- Jul 15, 2023
- Messages
- 1,434
Also forgot to mention, HPL’s gear oils are GL-4 and GL-5 safe because they don’t use a sulfur-based EP additive. It’s safe for yellow metals.
BrendanC
$100 site donor 2024
hopefully will have 6 quarts on the way, emailed mary jane about 2 quarts of 75w-90 for my AAM 9.25 IFS front end and 4 quarts of 75w-110 for my AAM 10.5” rear end.
I like that the 75W90 has higher viscosity at 100 C than the competition. I see most other 75W90 are in the 15cst range.
The 75w90 pour point is pretty amazing. It really changed up the cold shifting in my 991.1 7MT.
I went ahead and used their 75w75 MT fluid as well in my 6MT GTI, and also similar amazing results (when cold). I'm a believer. Very curious why their pour points are so much lower.
I went ahead and used their 75w75 MT fluid as well in my 6MT GTI, and also similar amazing results (when cold). I'm a believer. Very curious why their pour points are so much lower.
That is important or so it seems. There is a bit of conflicting info on the post 2010 years and yellow metals. Thanks That is what I was wanting to speak with Dave from HPL about, most specifically.
I’m interred in this stuff but just can’t justify having to order 6 qts. My only vehicle I’d use it on holds less than a qt in the transfer and rear diff. I used Schaeffers for the 1st time last week and can’t believe you can do much better. I’ve used motul and sever gear 80-90 and Schaffers is easily the quietest and smoothest I’ve ever used.
Interesting difference in the 4 ball wear between HPL and Amsoil.
