Mobil 1 4T synthetic 10w-40 : Yamaha R1 Forum
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Old 11-21-2012, 10:33 AM   #1
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Mobil 1 4T synthetic 10w-40

Hello everyone,

I am currently running Mobil 1 4T 10W-40 fully synthetic in my 07 R1.

Manual says to use 10W-30

Is 10W-40 acceptable?
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Old 11-21-2012, 10:36 AM   #2
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Old 11-21-2012, 10:46 AM   #3
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Originally Posted by ss55539 View Post
depends on the brand....

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Old 11-21-2012, 01:43 PM   #4
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You're good, I used Mobil 1 MX4T 10-40 for years (Mobil1 15w50 car oil too) but switched over to Amsoil, a little cheaper and more conveinient (shipped to my door)
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Old 11-21-2012, 01:45 PM   #5
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Old 11-21-2012, 01:59 PM   #6
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Yes you are fine with 10/40 weight oil. Yamaha was on their weird viscosity kick what seems like forever. Now they are " industry correct" with more common numbers. And most guys ran non Yamaha recommended anyway...

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Old 11-21-2012, 02:03 PM   #7
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Old 11-21-2012, 04:18 PM   #8
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Been using the Mobil1 4T 10-40 for many years in all my bikes and have been really happy.

You can find it reasonably cheap at most Autozones.
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Old 11-21-2012, 04:25 PM   #9
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Originally Posted by Eric08 View Post

I am currently running Mobil 1 4T 10W-40 fully synthetic in my 07 R1.

Manual says to use 10W-30

Is 10W-40 acceptable?

The manual should list a range of weights dictated by outside ambient temperature. I don't have a 2007 manual in front of me, but I'm almost certain it lists 10w-40 as a recommended weight.

Regardless of what the service manual says, there must be like a billion people using 10w-40 motor oil (motorcycle oil that is) in their bikes.

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Old 11-21-2012, 05:35 PM   #10
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May be recommended depending on where bike lives...
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