10w50 vs 15w50 - Page 2 - Ducati.ms - The Ultimate Ducati Forum
LinkBack Thread Tools Display Modes
post #11 of 13 (permalink) Old Feb 6th, 2018, 10:09 pm
tomf's Avatar
Join Date: May 2017
Location: Brookeville, MD, USA
Posts: 39
I standardized on Rotella synthetic years ago on all my bike but no longer. It is synthetic and MA (motorcycle) rated but otherwise it's mediocre oil according to this incredible research - https://540ratblog.wordpress.com/201...-test-ranking/ . I digested all that information and now use Mobil 0W40 in my bikes - wet clutch be damned. Mobil was designed for high revving, hot running European turbo engines. The evidence I can offer that Mobil protects well is that when Rotella got to full temp on my SV1000S I'd hear a bearing knock at idle. That's gone with the Mobil oil.

Final points:

1. A thinner oil is generally preferable provided you're getting adequate oil pressure. Flow is what's important.
2. Oil has evolved. Feel free to substitute 0W30 for 10W30, 0W40 for 15W40 etc., especially in colder climates.
tomf is offline  
Sponsored Links
post #12 of 13 (permalink) Old Feb 7th, 2018, 6:08 pm
Senior Member
Turbomart's Avatar
Join Date: Mar 2015
Location: Adelaide, SA, Australia
Posts: 291
Yep rat540 has some very good info.
I wouldn't go to low viscosity though, remember on a motorcycle the oil lubricates the gearbox too.
Gearboxes typically rely on splash feed lubrication rather than pressure feed. A thin oil can drip/fling off to easily. It's a balancing act between different needs. The manufacturers specs are best ,taken with your ambient temperature range.
But yes , you should go slightly thinner rather than thicker for improved oil flow and lower oil temperatures.
Keep in mind also that as a motor wears oil clearances increase and that the gearbox tends to chop up the oil molecule strands causing it to thin out during use.
Serious Black likes this.

If you cant fix it with a hammer, its probably electrical.
Turbomart is online now  
post #13 of 13 (permalink) Old Feb 7th, 2018, 6:13 pm
Senior Member
Turbomart's Avatar
Join Date: Mar 2015
Location: Adelaide, SA, Australia
Posts: 291
On a similar vein, years ago my 2stroke yz250 had issues with notchy stiff gear changes once hot, admittedly I was running in the outback in temperature over 35deg C. I changed from the recommended auto trans fluid to 80w90 grade and it used to shift like butter.

If you cant fix it with a hammer, its probably electrical.
Turbomart is online now  
Sponsored Links

Quick Reply

Register Now

In order to be able to post messages on the Ducati.ms - The Ultimate Ducati Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:


Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode

Similar Threads
Thread Thread Starter Forum Replies Last Post
Shell Advance 4T Ultra or Motorex Power Synt 4t therapyrider Multistrada 58 Dec 5th, 2017 5:49 am
Ducati Multistrada 1200 OEM Oil Filter + Two 4L jugs 15W50 Full Synthetic Bonaventure Parts and Accessories 7 Oct 9th, 2017 5:42 pm
Shell Advance 4T Ultra 15W50 - Unobtainium Bonaventure Oil and Lubrication 3 Jan 10th, 2017 11:21 am
FS: Motul Factory Line 300 V/4T Competition Synthetic Oil 15W50 4L. 101363 / 104129 pcguru2k Parts and Accessories 2 May 8th, 2016 6:27 pm

Posting Rules  
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

For the best viewing experience please update your browser to Google Chrome