Fome over here;
the DR650 thread - Page 7281 - ADVrider my recent post FWIW:
Oil.......
Quote:
Originally Posted by boboneleg View Post
Has the oil debate finished yet
Almost
Quote:
Originally Posted by BergDonk View Post
The argument against using a full synthetic in bikes like the DR, full of ball and roller bearings, is that they are too slippery. This results in the rolling elements skidding. With a less slippery/thicker semi of full mineral, they are forced to turn.
I have expereince with the roller follower bearings in my 501 Berg such thet their service life has to date been extended 3 times with the use of Delo 400 vs the previous Mobil 1 R4T.
Just sayin, and YMMV
Synthetic in plain bearing engines depending, but not ball/roller ones for me.
Most oil is good enough when changed often enough. My 501 Berg story, again, is that the service regime for the roller follower, which the DR doesn't have, is to change them out at 150 hrs. The roller follower is a needle bearing than sits between the cam and rocker, tracking the cam. The Berg has a particularly agressive up ramp on the cam, its even slightly concave to reduce overlap, and whacks the valves open hard.
Ignoring the 'its not really a full synthetic' discussion, I used Mobil 1 R4T from new, assuming full synthetic would be a good thing, and it came, and still comes well regarded. At 170 hrs, deciding that because I wasn't racing the bike full time etc, that I could let the change go out a bit, it started showing signs of loose tappets. I ordered the barings, pulled the rocker cover and found the cam lobes scuffed too, so ordered a new cam.
At the same time, maybe 15 years ago, over on UHE
Husaberg Forum - Husaberg Motorcycle Forum unsurprisingly, there was an oil discussion. Contributing to that was Dale Lineaweaver
Lineaweaver Racing whose CV included race winning Husabergs and a stint working at Chevron.
Having been invloved in its development, he recommended Delo 400, and had previously sold it rebottled branded as Husaberg.
I switched to Delo 400 then, and the old 501 now has over 600 hrs, the rollers fitted at 170 hrs are still the same ones. Only change was oil. No doubt there are possible other variables, like maybe I fitted the bearings better than the factory, the new bearings were a better spec, or.... But operating and maintenance regime is otherwise the same.
Its as close to a scientific test of oil I've done.
The synthetic being too slippery was one of the arguments at the time. True or not, dunno.
Lots of oil out there, lots of positive experiences suggesting that most are good enough. What's best?
If you're not bored yet , maybe this will put you to sleep;
https://540ratblog.wordpress.com/201...-test-ranking/
Now, about blinker fluid....
