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Old Jul 26, 2013 | 07:21 AM
  #11  
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Originally Posted by Markk9
Like someone else already said, Just about every other brand of motorcycle uses a shared sump, so the trans if lubed with motor oil, with no ill effects over 200K miles. Just think, all those GW go over 200K with 8K oil changes and a shared sump.
That is true, but they are designed and made to use the one oil, whereas our Harleys are designed and made for three.

Current big twins have the gear oil and engine oil in two separate compartments in the same casting. It would be very simple to make just one compartment for both - and yet......
 
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Old Jul 26, 2013 | 07:28 AM
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Bad idea to use the same oil in all 3.
The clutch should not have synthetic. Tranny should have gear oil.
 
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Old Jul 26, 2013 | 07:31 AM
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Originally Posted by grbrown
That is true, but they are designed and made to use the one oil, whereas our Harleys are designed and made for three.

Current big twins have the gear oil and engine oil in two separate compartments in the same casting. It would be very simple to make just one compartment for both - and yet......
Your wrong!!!! H-D calls for motor oil to be used. It's all the want-a-be engineers on the forums calling for other oil in the trans.
 
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Old Jul 26, 2013 | 07:37 AM
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Old Jul 26, 2013 | 07:46 AM
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Old Jul 26, 2013 | 08:10 AM
  #16  
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Mobil 1 V-Twin oil:

Maximum shear stability to help resist viscosity shear down in high performance engines and transmissions

Exceptional thermal stability to help resist oxidation and high-temperature degradation

Outstanding protection against wear of engine and transmission components

Enhanced lubrication to help maintain maximum power and acceleration over the life of the engine

Optimized wet-clutch performance

Excellent low temperature flow characteristics to help minimize engine wear during start-up
 
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Old Jul 26, 2013 | 08:15 AM
  #17  
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If I'm correct,HD now recommends Formula+ in gearboxes,not motor oil .........
 
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Old Jul 26, 2013 | 08:22 AM
  #18  
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Did not mean to start a war..
My buddy took his to dealer to get changed . they put Harley synthetic in all 3..
Im just not a fan of spending the money for HD oil.

The manual says to use HD thats bs. Thats about money.

I dont want this to turn into what oil is better because thats a bunch of crap also. I would Just like to put the same in all 3. Just checking to see what you guys are doing.
SO
we dont need to argue. But lets just see who uses the same in all 3 and who dose not. Please reply.
 
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Old Jul 26, 2013 | 08:31 AM
  #19  
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I started out using Harley Synthetic in all 3 holes (manual says it's fine) just to keep things simple.

To try and reduce the "clunking" from the trans, I decided to give Redline Trans fluid with Shockproof a try and I think it helped.

So, now I use Mobil 1 V-Twin in the engine, Redline 42804 Trans oil w/shockproof in the Transmission, and Redline 42904 in the Primary.

Is it any better the just using synthetic motor oil in all 3-holes???...who knows, but it makes me feel better...and that's what counts
 
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Old Jul 26, 2013 | 08:40 AM
  #20  
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20-50 Mobil 1 or Amzoil synth in the engine, Belray Chaincase lube for the primary, and Belray Big Twim trans oil in the tranny.
 
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