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Thunderbird Twin - Technical Talk Technical talk for the big Thunderbird twin

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post #1 of 54 (permalink) Old 11-26-2009, 11:55 AM Thread Starter
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Oil Preference

I scanned the forum for threads on preferred oil but didn’t see anything (or missed it).

So, what oil brands rank high amongst Triumph riders (Mobil 1, Red Line, etc)?

My Harley Davidson neighbor swears by Amsoil and I personally like Royal Purple.

Any comparison stats or comments would be great!
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post #2 of 54 (permalink) Old 11-26-2009, 12:38 PM
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After reading about oil ad nausium both in oil threads at many forums and doing google research, i've come to the conclusion any good oil is going to be as good as the next if you change it VERY often. The shear factor in bikes with shared oil between case and gear box is what kills oil much quicker than in a car. It's said 3k is the point at which it loses a large portion of it's lubrication properties. So may say change it every 3k instead of worrying about oil types. Thats from what i've read seems to be the overwhelming general consensus.

That said, i think no one would disagree that you can't go wrong with M1 bike oil or amsoil. But as far as which bike oil has been the #1 most touted overall in my searches i'd have to say it's probably motul. I've never heard a bad thing said about it, only real positive things. It was also recommended to me by triumph a mechanic i probably respect more than any other triumph mechanic. So that would be my choice.
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post #3 of 54 (permalink) Old 11-26-2009, 08:57 PM
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Mobil 1 Racing 4T


Dazco is right but my oil of choice for all my bikes (air or watercooled) is mobil1 R4T.

Other bikes: 2005 Thruxton with 904 Wiseco big bore kit, BC stage one cams, CR carbs & BC Predators, 2010 Husaberg FE390, 2010 Triumph Thunderbird 1700, 2009 Kawaskai ZX-6R, 2011 Kawasaki Ninja 1000.
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post #4 of 54 (permalink) Old 11-26-2009, 09:39 PM
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I also went the M1 4T route. There was a noticeable difference in noise and shifting when I changed out the break-in blend. Mobil1, Amsoil, Motul, Lucas, Royal Purple...all good stuff. Go with what you can get and make sure its API SH+ and JASO MA compliant. BTW, the "MA" is VERY important here, it means that the oil has been tested and approved for wet clutch applications in motorcycles. If it's not JASO MA, you're asking for problems so be careful with that. NEVER NEVER NEVER run automobile oil in a motorcycle with a wet clutch.

Here's a few (use this term loosely for some of these) "studies"...




And there's a few thousand links out there showing the Amsoil propaganda testing. Easy to find and think what you want about them. I would prefer the tests were funded and presented by someone other than Amsoil if you know what I mean.

Last edited by 31712; 11-26-2009 at 09:49 PM.
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post #5 of 54 (permalink) Old 11-26-2009, 10:35 PM
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Ditto on the Mobil 1 Racing 4T... It's worked well in my bikes...
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post #6 of 54 (permalink) Old 11-28-2009, 08:42 PM Thread Starter
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Dazco...Motul, I think I'll switch from Royal Purple!

Thanks All for your input....

Last edited by AZfun; 11-29-2009 at 10:12 AM.
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post #7 of 54 (permalink) Old 11-30-2009, 05:34 PM
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Here is a report that is a good read:


I have always used Mobil 1 - 20W50 in my bikes whenever possible (for the higher shear resistance). I certainly wouldn't have any problem using other brands like Amsoil.

Before he did it, I'd have said it couldn't be done.
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post #8 of 54 (permalink) Old 12-15-2009, 10:47 PM Thread Starter
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I found out break-in oil for my Thunderbird is MOTUL 3000 4T 10W40.

Afterward, the dealer recommends 15W50 Mobil synthetic.

I may stick with Motul....
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post #9 of 54 (permalink) Old 10-21-2010, 01:36 PM
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Hi as far as I'm aware Triumph have always recommended Mobil1 to be used in their motorcycles, but they have now done a deal with Castrol see link below>

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post #10 of 54 (permalink) Old 10-21-2010, 01:44 PM
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Rotella in all my vehicles.
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'09 Bonny SE, '09 Sprint ST
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