Rear Drive Oil Question

[Mackers]

Moto Guzzi recommend 85w-90 for the rear drive of my Breva 1100. Can I replace this with 85w-140?

 

[CATERHAM]

Why on earth would you want to?
The 90wt will provide all the protection you need without unduly sapping power particularily with a synthetic.
The 140 wt is intended for heavy truck diff's.

Caterham Super 7 - GC
Lotus Europa Special - 20w-50 dino
Porsche 928S4 - M1 5w-40
BMW 328i - M1 0w-40

 

[kingrob]

Too thick. Stick with the 90wt.

 

[wileyE]

Thick stuff is more apt to foam and blow out the vent. Even the correct grade can do it if you run hard on a cold morning,

 

[kballowe]

Originally Posted By: Mackers
Moto Guzzi recommend 85w-90 for the rear drive of my Breva 1100. Can I replace this with 85w-140?


Probably doesn't hurt to stick with the manufacturer's recommendation.

I know that some run that heavier oil in their Honda shaft drives and seem to get good service. Maybe if you ride a lot in really hot temperatures but still, (personally) I'd stay with the manufacturer's recommendation.

 

[Mackers]

Thanks everyone. I only asked because I can get the 85w-140 more readily.

 

[cephas]

Some good info over at: http://wildguzzi.com/forum/index.php did a quick search and saw: http://wildguzzi.com/forum/index.php?topic=3649.0 Have a good one!