Oil Change

[Bryanj]

https://www.amazon.co.uk/Comma-TFSD5L-Transflow-15W40-Liter/dp/B00D8Z8FFG/ref=sr_1_6?ie=UTF8&qid=1508689897&sr=8-6&keywords=comma+10w40

The Halfords one I posted was mineral not synthetic

[K2-K6]

http://www.ducatimeccanica.com/oil.html

Worth a look. It supports the view that the oils are not specific to motorcycles, but principally marketing and cost position.

That claim of "not using friction modifiers" it's never stated what these mystical elements are. Oil itself is the biggest friction modifier of all ( and that's why we use it)  these designs choose to run the clutch saturated in it!

[Trigger]

http://www.ducatimeccanica.com/oil.html

Worth a look. It supports the view that the oils are not specific to motorcycles, but principally marketing and cost position.

That claim of "not using friction modifiers" it's never stated what these mystical elements are. Oil itself is the biggest friction modifier of all ( and that's why we use it)  these designs choose to run the clutch saturated in it!

Well I never 

[Green1]

I'm sure Iv posted it on here in the past I once spoke to a sales rep from Castrol about bike oil and he told me its all advertising blurb to confuse the customer into buying a more expensive product.
I for one will carry on using car oils in my bikes.

Why some bikes suffer clutch slip on certain oils is any ones guess.   

[Johnwebley]

 I use 10-40 semi sinthetic from Eurocarparts

  the 500 is up to 65k miles,uses a little oil,but runs well,

 lovely light clutch and no hint of slippage


https://www.eurocarparts.com/ecp/p/car-parts/engine-parts/engine-parts1/engine-oils/?521776011&1&cc5_245


  they often have a BOGOF deal,or discount code

[Green1]

That's what Iv been using John I buy it in 20lt for £30

[Trigger]

I use 10-40 semi sinthetic from Eurocarparts

  the 500 is up to 65k miles,uses a little oil,but runs well,

 lovely light clutch and no hint of slippage


https://www.eurocarparts.com/ecp/p/car-parts/engine-parts/engine-parts1/engine-oils/?521776011&1&cc5_245


  they often have a BOGOF deal,or discount code

Is the lovely light clutch down to the oil or that well improved clutch push rod I made you 

[Johnwebley]

I use 10-40 semi sinthetic from Eurocarparts

  the 500 is up to 65k miles,uses a little oil,but runs well,

 lovely light clutch and no hint of slippage


https://www.eurocarparts.com/ecp/p/car-parts/engine-parts/engine-parts1/engine-oils/?521776011&1&cc5_245


  they often have a BOGOF deal,or discount code

Is the lovely light clutch down to the oil or that well improved clutch push rod I made you 

 well,the wonderful new clutch pushrod,and the oil made a difference,
but it must have been the assembly of said parts that made it really smooth,
and greasing the worm drive lifter !!!

[K2-K6]

As above. Those clutch components,  how they are assembled,  and final setup make a big difference to clutch operation and lifing.

I find generally that concern over a clutch operation usually concerns things like drag,  finding neutral and smooth operation,  it's rare however that final part of how the release cycle is performed is examined, which is the area that can most easily bring about clutch slip. It's often that the system is adjusted to try and affect the first listed effects and leave the mech holding the clutch very slightly from fully closing. The condition of the parts and leaving free play when released will prevent any unintended clutch wear. Too many owners miss this crucial point.