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post #1 of 10 (permalink) Old 11-19-2012, 10:55 AM Thread Starter
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OIL - Good read before you start the next oil thread

I found this article to be one of the best out there on oils and answers a lot of questions.


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post #2 of 10 (permalink) Old 11-25-2012, 11:46 PM
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Thanks Bob. An enjoyable read. I think I'll put Rotella T 15W-40 in my T160.
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post #3 of 10 (permalink) Old 12-04-2012, 09:56 PM
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Thanks for the link
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post #4 of 10 (permalink) Old 12-10-2012, 09:09 AM
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post #5 of 10 (permalink) Old 02-10-2013, 12:37 PM
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A great read on oil. Thank you for the post.
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post #6 of 10 (permalink) Old 02-12-2013, 01:12 AM
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Just one point I'd make about the article, it isn't triumph specific and at some point he mentions using diesel oils in bike engines.
One thing I do know is the detergents can and do break up the carbon deposits in a Triumph crankshaft gallery and when they wash out into the bigends they cause scoring of the shell bearings.
If you are going to use diesel oil do make sure you are starting with a freshly cleaned out crank gallery first.
I've run diesel oils for years in my vehicles specifically to clean out the internal deposits and keep them clean and in this respect they are unequaled but I won't be running it in my Triumph again any time soon.

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post #7 of 10 (permalink) Old 02-18-2013, 10:44 PM
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I,ve been running 20/50 in my T140, but after reading this I think I will go to 15/40
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post #8 of 10 (permalink) Old 09-11-2013, 09:34 PM Thread Starter
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Have been doing more research on oil for vintage engines. Was directed to this article by an oil chemist. Although about auto engines much applies to our engines.


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post #9 of 10 (permalink) Old 09-12-2013, 11:10 AM
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Just a heads up, this is an older article, discussion on the Rocket III forums seems to indicate that Shell has lowered the phosphorous (zdp) level in their RotellaT recently. Possibly an issue with flat tappet cam engines.

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post #10 of 10 (permalink) Old 10-10-2013, 10:41 PM
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As Tripps mentioned this is an older article.

His understanding of the JASO MA and MB standards is misleading. The JASO MA, MA1 and MA2 standard is more about the effect of the oil in engines that share engine oil in the clutch. If you are concerned about clutch slippage than you need to understand what the JASO people are talking about.

Because the choice of the grade of oil you use has everything to do with ambient air temperature, unless you are living where day time temperatures are 30 to 40° F, you should be using 20W50 in your vintage Triumph.
John Healy

Last edited by johntioc; 10-10-2013 at 10:46 PM.
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