I have yet to test a hypoid oil that comes even close to that of Omega 690 80W/90 GL7.
If your gearbox is a bit sticky and not smooth enough - that's the oil to test.
Distributörer av Omega olja och fett såsom smörjolja och smörjfett - Smörjteknik Norden AB
Magna Industrial Co. Limited
I have tested most oils on the market since 1987. Mineral and synthetic. No scientific study though, just testing in my vehicles - and none have even come close to that of Omega 690.
In the BMW Sweden group there is a fancy for 75W/140 fully synthetic... I tested that crap and had to change after the first run... way too thick and shifting felt like moving a spoon in syrup.
The second best hypoid in my opionion is Quaker State 75W/90 mineral.
You can ad STP oil enhancer - those who have tested that claim just about the same as I say about Omega. I have yet to test STP.
- do not use Slick 50. It works - as long as the silicone(?) film sticks to the surfaces... when it brakes the wear is augmented badly... a couple gearboxes broke for me and I lost compression on an engine as well...
Synthetic oils do have a niche - low temps.
When one rides at below 5F (-25'C) one do kind of need synthetic oils... at -5F (-35'C) and down the mineral oils will freez... are you riding at these temps?
Last edited by dc lindberg; 21 Jul 2009 at 08:58.