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 Motor oil weight and other brands
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Joined: Apr 2010
Posts: 103
Adjunct
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OP
Adjunct
Joined: Apr 2010
Posts: 103 |
In the Tech Vault it says: Quote:
- Owner's manual says 10w40 or 15w50, if it meets 15W50, JASO MA and API SG
- Triumph's spec is API SJ or higher
- All Triumph engines must be filled with a 10W-40 or 15W-40, semi-synthetic or fully synthetic motorcyle engine oil which meets or exceeds API SG, API SH and JASO MA
OIL
Amsoil - MCV SAE 20W-50 Synthetic
Mobil 1 4Mxt
Mobil 1 Mx4T 10W40
Mobil 1 4Mt Motorcycle Oil 10W40
Mobil 1 "V Twin" 20/50 Oil
Mobil 1 Gold Cap
Shell Rotella T Synthetic 5W40 (Higher?)
Rotella 10W-40
LUCAS Motorcycle oil, full synthetic 20W50 and 10W40 for $8.20 a quart. Found at an Auto parts store here in Indy called O'Reilly's. Steve
My manual only says 15w50. Where are we getting the 10w40?
Also, has anyone tried Red Line Racing 50WT (15w50) or the Amsoil Dominator 15w50?
I realize the tech vault does not have an all inclusive list of every oil usable, but can someone at leat explain why some are given as one weight or the other and some are given as either or?
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Re: Motor oil weight and other brands
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Joined: May 2007
Posts: 5,068 Likes: 1
Saddle Sore
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Saddle Sore
Joined: May 2007
Posts: 5,068 Likes: 1 |
A lot depends on the ambient temp of where you are operating the machine . Colder-thinner , hotter-thicker . Mmmmm , oil !  
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Re: Motor oil weight and other brands
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Joined: Apr 2007
Posts: 3,063 Likes: 8
Loquacious
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Loquacious
Joined: Apr 2007
Posts: 3,063 Likes: 8 |
The service manual calls for 15W-50 semi or full synthetic. The owners manual calls for either 10w-40 or 15W-50 semi or full synthetic. I use 20W-50 Amsoil or Mobil 1 Vtwin. Note the reference to the JASO rating. Most 15W-50 that is available in auto shops does not meet this and could cause problems with wet clutch in our engines. Mobile makes a 15W-50 racing oil specifically for Triumph but it is expensive and hard to get.
12 Rocket Roadster
03 Bonneville America
69 BSA Firebird Scrambler
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Re: Motor oil weight and other brands
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Joined: Mar 2009
Posts: 12,964
Stickman Yogi
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Stickman Yogi
Joined: Mar 2009
Posts: 12,964 |
The thing of it is... when you see a 'W' it means the oil viscosity has been tested at colder temperatures. This allows the engine to get quick oil flow when it is started cold verses dry running until lubricant either warms up sufficiently or is finally forced through the engine oil system.
So... if ya live in a place where COLD starts are the norm, then maybe a 10W or even 5W oil is best for your bike. The second number (without the 'W') is for a viscosity that was tested at HOT temps. Higher numbers are best suited for higher temperatures.
I live in a place where cold starts are the norm for spring and fall but summer is super hot. I like to run a 10W50 oil which covers all concerns from cold starts to hot running temps. Hope this helps!!
Live to love, love to live.
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