Final Drive lube for my 2019 RT

[bones181]

Howdy ya'll,
Speck sheet shows that my bike's final drive requires 70W80 GL-5 gear oil. The bike has always been serviced at Bob's and this will be the first time for me to change the final fluid. This bike is out of warranty so I don't think that I have to use $$$ BMW oil. The only 70W80 GL-5 I've been able to match up is a MOPAR labeled product and it's nowhere to be found.
I've been using Amsoil 80W90 GL-5 in all my BMW final drives for yrs with no problems.
Finally, my question is, what are the options here? 75W85, 80W90?
What say you?

 

[dennypink]

Afternoon Bones181 - Any name brand 80W-90 GL-5 rated, full synthetic gear lube is what you need.
DP

 

[bones181]

Thanks Denny, seems reasonable to me.

 

[lkchris]

Your 2019 is a Wethead ... not a Hexhead/Camhead

 

[BrianAMcPhail]

I follow this guy on you tube- I've not actually bought anything, but it seems like their maintenance kits are pretty comprehensive. ... https://www.pacmototours.com/store/r1200rt

 

[jandhumphreyme]

Unless you ride in very cold temps, I'd keep using the Amsoil, 75w vs 80w are both "Winter" ratings. You can send Amsoil an email and ask their opinion, I've found them to be very responsive in past correspondence.