do people use 10w40 oil on the s1krr? - BMW S1000RR Forums: BMW Sportbike Forum
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post #1 of 21 (permalink) Old 04-14-2017, 04:38 PM Thread Starter
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do people use 10w40 oil on the s1krr?

I know you're supposed to use 5w40 oil in the bmw, but can you just use 10w40 oil? It's not like i'm starting the bike up when its sub zero temperatures outside. just wondering if this would damage the bike as maybe the tolerances are extremely tight on these bikes and perhaps 10w40 oil would cause too much oil pressure to build on a start up.
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post #2 of 21 (permalink) Old 04-14-2017, 04:39 PM
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Search is your friend. Simple answer - yes.
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post #3 of 21 (permalink) Old 04-14-2017, 05:55 PM
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I use it. Main reason is I believe a 5w is to thin for the valve train. Plus I live in Brisbane. So it's not like I need the low temperature range

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post #4 of 21 (permalink) Old 04-14-2017, 07:28 PM
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I use 10w40 Amsoil when the temp gets above 80 when starting it up. I called Amsoil and they said its fine to use even down to freezing but in the winter time or when below 80 i use Castrol power 1 5w40. I do think the Amsoil protects better when hot out sense these bikes run so hot to begin with.
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post #5 of 21 (permalink) Old 04-14-2017, 08:51 PM
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I have 40,000 miles on s1000rr mostly at the track all 10w40


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post #6 of 21 (permalink) Old 04-15-2017, 12:14 AM
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No problem here using 10w-40
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post #7 of 21 (permalink) Old 04-15-2017, 12:00 PM
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Btw: just the solve the misconceptions people have. 5w is how the oil weight/density when cold and the 40 is the weight when hot. 5w is only necessary below 32 deg F


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post #8 of 21 (permalink) Old 04-15-2017, 05:45 PM
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Where I live, a `cold` start is about 58 deg. F, and thats rare. 10w40 works for me. I think one of your other posts said you are in Denver? Your requirements might be a little different.

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post #9 of 21 (permalink) Old 04-15-2017, 06:23 PM
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"In a 10w-40 for example the 10w bit (W = winter, not weight or watt or anything else for that matter) simply means that the oil must have a certain maximum viscosity/flow at low temperature. The lower the "W" number the better the oil's cold temperature/cold start performance.

The 40 in a 10w-40 simply means that the oil must fall within certain viscosity limits at 100C. This is a fixed limit and all oils that end in 40 must achieve these limits. "

I did not know that the "w" literally meant "winter".
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post #10 of 21 (permalink) Old 04-16-2017, 12:40 PM
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I used 10w-40 on my last service and there was a big difference in the shifting. Waaaay smoother!
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