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Author Topic: 091 race box gear oil  (Read 1860 times)
Tufty65
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Posts: 118



« on: February 03, 2016, 23:48:36 pm »

What type of gear oil should I be using in a 091 race box, weddle everything, with pro rings and slick shift?
I'm reading conflicting reports for gl4 and gl5 and vice versa.
Thanks.
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Fiatdude
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Posts: 1823



« Reply #1 on: February 04, 2016, 05:35:55 am »

Ask the builder would be my suggestion

Benco recommends several different types depending on what's inside --- but they are all dyno's -- no synthetics
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Bruce
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« Reply #2 on: February 04, 2016, 09:52:55 am »

I'm reading conflicting reports for gl4 and gl5 and vice versa.
The reason 091 cores are so expensive is because most of them started out using GL-4, and a lot of them never survived Bus life because of it.
You absolutely need the increased extreme pressure rating of a GL-5 oil.
For a while, Rancho was recommending this oil:
http://www.redlineoil.com/product.aspx?pid=44&pcid=8


« Last Edit: February 04, 2016, 13:48:43 pm by Bruce » Logged
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