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Red Line 0W40 or 10W40 for winter use? #4559591
10/30/17 06:29 PM
10/30/17 06:29 PM
Joined: Oct 2005
Posts: 31
VA
uzun Offline OP
uzun  Offline OP
Joined: Oct 2005
Posts: 31
VA
Hi guys,

My 2015 KTM Super Duke R is due for an oil change soon. The owner's manual recommends the Motorex 10W-50 as long as the ambient temp is above 32F, but this oil has the bad reputation of shearing down too much in KTMs. With the winter coming, I am considering the following 0W40 and 10W40 oils from Red Line:

https://www.redlineoil.com/0w40-powersports-oil

https://www.redlineoil.com/10w40-motorcycle-oil

I normally ride in the winter as long as the ambient temp is above 40F. It seems the 0W40 would provide better cold start protection. Interestingly, its 100-degree Celcius viscosity is higher than that of the 10W40 according to the info on the website. So it's a pretty thick 40W at operating temp, which is also desirable given that the manual recommends a 50W oil above 32F ambient.

Which one do you think would be the better choice for winter use?

Re: Red Line 0W40 or 10W40 for winter use? [Re: uzun] #4559600
10/30/17 06:35 PM
10/30/17 06:35 PM
Joined: Oct 2014
Posts: 12,577
Idaho
CT8 Offline
CT8  Offline
Joined: Oct 2014
Posts: 12,577
Idaho
10W-40


2015 Ford F150 2.7
2018 Ford F350 6.2
Re: Red Line 0W40 or 10W40 for winter use? [Re: uzun] #4559614
10/30/17 06:43 PM
10/30/17 06:43 PM
Joined: Jan 2017
Posts: 632
Melbourne, Florida
RichardS Offline
RichardS  Offline
Joined: Jan 2017
Posts: 632
Melbourne, Florida
Is one known to be more shear stable than the other?

For my own curiosity, what does the suggested 10w-50 swear down to during a usual OCI?

All things the same, I'd go for the 0w just because of the lower cold temp performance.


2008 Dodge Caliber SE 2.0 117k
4qt Imeditsu 0w-20, 1/2qt Mobil SS 5w-20 Fram HM

2003 Buick Century 107k
4.5q Havoline 5w-30 HM Fram XG
Re: Red Line 0W40 or 10W40 for winter use? [Re: uzun] #4559617
10/30/17 06:45 PM
10/30/17 06:45 PM
Joined: Sep 2015
Posts: 6,075
Kalifornia Kollective
BrocLuno Offline
BrocLuno  Offline
Joined: Sep 2015
Posts: 6,075
Kalifornia Kollective
Yeah, it's all about the shear stability. Read up and pick that one smile


Formerly in marine engineering. In an earlier life I owned my own petroleum tank truck, and hauled for the majors and independent's.
Re: Red Line 0W40 or 10W40 for winter use? [Re: uzun] #4559619
10/30/17 06:46 PM
10/30/17 06:46 PM
Joined: Aug 2009
Posts: 3,920
Pittsburgh,PA U.S.A.
JimPghPA Offline
JimPghPA  Offline
Joined: Aug 2009
Posts: 3,920
Pittsburgh,PA U.S.A.
0W


Boy will I be happy when ALL vehicles on public roads are autonomous.


JimPghPa

Re: Red Line 0W40 or 10W40 for winter use? [Re: uzun] #4559640
10/30/17 07:00 PM
10/30/17 07:00 PM
Joined: Oct 2005
Posts: 31
VA
uzun Offline OP
uzun  Offline OP
Joined: Oct 2005
Posts: 31
VA
Thanks for the suggestions. I need to find out more about the shear stability of these two oils.

RichardS: Motorex 10W-50 is known to shear down to 30 weight in shared sumps!

Re: Red Line 0W40 or 10W40 for winter use? [Re: uzun] #4559759
10/30/17 10:51 PM
10/30/17 10:51 PM
Joined: Jul 2011
Posts: 153
California
David_g Offline
David_g  Offline
Joined: Jul 2011
Posts: 153
California
Originally Posted By: uzun
I normally ride in the winter as long as the ambient temp is above 40F.

...that the manual recommends a 50W oil above 32F ambient.

Which one do you think would be the better choice for winter use?

I would go with KTM on this one and choose an xW50, and not one of the xW40s.


2007 BMW R1200R (Mobil 1 15W50, Red Line Shockproof Heavy, Supertech 75W90)
2016 Honda Africa Twin DCT (Motul 5100 10W40)
Re: Red Line 0W40 or 10W40 for winter use? [Re: uzun] #4559785
10/31/17 01:08 AM
10/31/17 01:08 AM
Joined: May 2005
Posts: 10,551
ROCHESTER, NY
Char Baby Offline
Char Baby  Offline
Joined: May 2005
Posts: 10,551
ROCHESTER, NY
I would say, 0W for cold start up.


"Retired"
-----------------------------------

'80 Firebird FORMULA V8/4bbl-purchased "NEW"
'15 Nissan Altima 2.5 SV
'15 Honda Civic LX
Re: Red Line 0W40 or 10W40 for winter use? [Re: uzun] #4559802
10/31/17 03:40 AM
10/31/17 03:40 AM
Joined: Dec 2013
Posts: 3,989
Manchester, England
Olas Offline
Olas  Offline
Joined: Dec 2013
Posts: 3,989
Manchester, England
10w is good down to -5f. Will you be riding when it gets that cold?

Redline does not shear on a shared sump - at least it didn't used to, before the buyout & reformulation.


Cable ties should hold it
Re: Red Line 0W40 or 10W40 for winter use? [Re: uzun] #4559805
10/31/17 03:45 AM
10/31/17 03:45 AM
Joined: Jan 2017
Posts: 632
Melbourne, Florida
RichardS Offline
RichardS  Offline
Joined: Jan 2017
Posts: 632
Melbourne, Florida
Uzun,
That's a heck of a loss in viscosity!


2008 Dodge Caliber SE 2.0 117k
4qt Imeditsu 0w-20, 1/2qt Mobil SS 5w-20 Fram HM

2003 Buick Century 107k
4.5q Havoline 5w-30 HM Fram XG
Re: Red Line 0W40 or 10W40 for winter use? [Re: uzun] #4559850
10/31/17 05:32 AM
10/31/17 05:32 AM
Joined: Jun 2015
Posts: 4,415
New England
Virtus_Probi Offline
Virtus_Probi  Offline
Joined: Jun 2015
Posts: 4,415
New England
If you're only going to be riding above 40F, that 0W40 probably isn't going to buy you anything over the 10W40.
I'd guess the 10W40 is going to be more shear stable and would be a better choice as a result.


2014 Forester XT, 90000 miles
Last Change;
M1 5W30 d1G2
Tokyo Roki 15208AA170 filter
Re: Red Line 0W40 or 10W40 for winter use? [Re: uzun] #4559860
10/31/17 05:41 AM
10/31/17 05:41 AM
Joined: Sep 2014
Posts: 2,177
US-WA
Dyusik Offline
Dyusik  Offline
Joined: Sep 2014
Posts: 2,177
US-WA
There is nothing 10w, 15w or a 20w can't handle at 40F...


95 Cherokee 190K DELO 10W30, XG8
07 IS250 103K Napa 10w30, FULL
04 YZF-R1 19K DELO 15w40, XG7317
99 HD XL1200S 21K VR1 20w50, NG1515
14 RX450h 35k PP MIX, NG7047
Re: Red Line 0W40 or 10W40 for winter use? [Re: JimPghPA] #4559941
10/31/17 07:32 AM
10/31/17 07:32 AM
Joined: Oct 2014
Posts: 12,577
Idaho
CT8 Offline
CT8  Offline
Joined: Oct 2014
Posts: 12,577
Idaho
Originally Posted By: JimPghPA
0W
To high VII as well as the 0W is not needed.


2015 Ford F150 2.7
2018 Ford F350 6.2
Re: Red Line 0W40 or 10W40 for winter use? [Re: uzun] #4559946
10/31/17 07:36 AM
10/31/17 07:36 AM
Joined: Sep 2012
Posts: 2,221
London, England
bigjl Offline
bigjl  Offline
Joined: Sep 2012
Posts: 2,221
London, England
Personally i would stick with 10w50


16 S350d LWB 25k Mobil Super 3000 XE 5w30
17 Smart ForFour Auto 6.5k Mobil 1 0w40 FS
Re: Red Line 0W40 or 10W40 for winter use? [Re: uzun] #4560061
10/31/17 09:26 AM
10/31/17 09:26 AM
Joined: Jun 2017
Posts: 172
New York
jeff78 Offline
jeff78  Offline
Joined: Jun 2017
Posts: 172
New York
If you're not going to be starting the bike too far below freezing, even a monograde 40 will pump just fine, and it will have the advantage of zero shear across any OCI you dare. My go-to monograde is Valvoline VR1 SAE 40.

But if I were forced to choose between those two Red Line grades, I'd pick the 10W-40 in spite of the lower 100C viscosity if only because the HTHS for the 0W-40 is unknown. Most here would regard HTHS viscosity as being more relevant/important. Also, the very high viscosity index of the 0W-40 (221!) and higher NOACK hints at there being more (shearable) VII's than the 10W-40. But that's just my guess. You can always ask them what the 0W-40's HTHS is.


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