SuzukiSavage.com - Is it safe to use 10W30 engine oil instead 10W40?

norm92de Serious Thumper Offline SuzukiSavage.com Rocks! Posts: 1180 El Paso TX Gender:	Re: Is it safe to use 10W30 engine oil instead 10W Reply #15 - 12/06/17 at 08:57:52 JLC, Don't feel bad I am as confused as you are. Why two different T6s???
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batman Serious Thumper Offline SuzukiSavage.com Rocks! Posts: 3806 osceola new york Gender:	Re: Is it safe to use 10W30 engine oil instead 10W Reply #16 - 12/06/17 at 09:12:31 JLC , I believe you're correct ,I think Dave is mistaken .
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Re: Is it safe to use 10W30 engine oil instead 10W
Reply #17 - 12/06/17 at 10:17:03

I have said it be for and I will say it again, I use the new T-6 in a 2017 S40 and have NO clutch slippage. As far as using a 10-30 in Canada (I live in Calgary) you might run into some problems in the summer if you are on the highway, but if you are just running around town then I think you would be fine, Just my .02.

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stewmills

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Re: Is it safe to use 10W30 engine oil instead 10W
Reply #18 - 12/06/17 at 12:51:32

Ok...below is an email stolen from another MC thread. However, see the image provided from BITOG where they did the analysis on the old and new T6. Per the post where I took the image comparison, he states that CJ-4 is the left column vs CK-4 in the right column.

The following is from an Email from SHELL:

We recently ran the JASO MA friction test on Rotella T with Triple Protection 15W-40, Rotella T Synthetic 5W-40 (CI-4) and our Rotella T Synthetic 5W-40 CJ-4.
All three oils passed the wet clutch friction test. Rotella T Synthetic 5W-40 (CI-4) has more than 1.2% ash (JASO MA spec limit) so it can not be classified as JASO MA. However, Rotella T with Triple Protection 15W-40 and our soon to be introduced Rotella T Synthetic 5W-40 CJ-4 do meet JASO MA."

If you have any additional questions please call us at 800-231-6950.
Thank you for your interest in Shell products.

Richard Moore
Staff Engineer

Shell Global Solutions (US) Inc.
Westhollow Technology Center
PO Box 4327
Houston, TX 77210
United States of America

So, what does this all mean to you people (most of you) smarter than me?

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Papa Bear Senior Member Offline Posts: 476 Canada ... near the Motor City Gender:	Re: Is it safe to use 10W30 engine oil instead 10W Reply #19 - 12/06/17 at 13:17:50 I have posted that here repeatedly.
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stewmills Serious Thumper Offline Imagination is more important than knowledge Posts: 2626 Auburn, AL Gender:	Re: Is it safe to use 10W30 engine oil instead 10W Reply #20 - 12/06/17 at 13:41:30 Papa Bear wrote on 12/06/17 at 13:17:50: I have posted that here repeatedly. Thought it was floating around here somewhere before. Stumbled on it reading another article outside of ss.com and thought I would throw it in here for good measure just in case.
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Re: Is it safe to use 10W30 engine oil instead 10W
Reply #21 - 12/06/17 at 14:35:48

batman wrote on 12/06/17 at 09:12:31:

JLC , I believe you're correct ,I think Dave is mistaken .

I think there is an apple/oranges thing going on here.

There was an "old" Rotella T6 that we had used for years, and it worked fine in the Savage. It was rated CJ-4 and was also MA rated for motorcycles. It came in the "old squatty" bottle.

Recently the "new" Rotella T6 came out and it was a reformulated version of the CJ-4 we had been using, and it is in the taller redesigned bottle. The amount of moly in the oil was increased, and some long term users of T6 started to experience clutch slippage issues. (If you can use this oil and not have a slippy clutch....great!)

And now comes along another grade of oil....a CK-4 rated synthetic oil.....and just to confuse us they are also calling this oil T6 even though they already have a T6. It is not yet available in any store or truck stop I have seen - it is in a shorter bottle than the CJ-4 rated T6....and evidently the only reason it is not rated for motorcycle use is that the exceeds the alowable limit of phosporous....but it is alright for use in wet clutches....and it has less moly than the CJ-4 rated T6. If you can find it - it is most likely going to be the better T6 for the Savage as it has less moly and more ZDDP.

So we can avoid this confusion in the future....what are you wanting to call the 3 versions of T6 to avoid more confusion? We have the "original" CJ-4 rated T6, the "new" reformulated CJ-4 rated T6, and a completely new CK-4 rated T6.

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stewmills Serious Thumper Offline Imagination is more important than knowledge Posts: 2626 Auburn, AL Gender:	Re: Is it safe to use 10W30 engine oil instead 10W Reply #22 - 12/06/17 at 14:48:22 Old CJ4, reformulated CJ4, and new CK4?
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stewmills Serious Thumper Offline Imagination is more important than knowledge Posts: 2626 Auburn, AL Gender:	Re: Is it safe to use 10W30 engine oil instead 10W Reply #23 - 12/06/17 at 14:53:27 The New CK4 culprit:
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JLC Senior Member Offline SuzukiSavage.com Rocks! Posts: 262 Black Forest, Colorado Gender:	Re: Is it safe to use 10W30 engine oil instead 10W Reply #24 - 12/06/17 at 14:59:45 The one to get is the T6 ( CK-4) Extreme Temperature.
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stewmills Serious Thumper Offline Imagination is more important than knowledge Posts: 2626 Auburn, AL Gender:	Re: Is it safe to use 10W30 engine oil instead 10W Reply #25 - 12/06/17 at 15:06:24 Is this a correct assessment?
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Re: Is it safe to use 10W30 engine oil instead 10W
Reply #26 - 12/06/17 at 15:24:43

The T6 CK-4 "extreme temperature" is what I found at WalMart, and what I have in my S40, JASO MA rated, without Moly. I have not used others, but if they are JASO MA rated, and without Moly, they must be suitable.

After all the postings and what I have seen online, I believe the only T6 which was suspect was the later T6 CJ-4, which I had in my S40 for about 900 miles and is now discarded. That being said, I had no clutch slippage during those 900 miles.

I'll just stick to what I have in my S40 for the forseeable future (T6 Extreme temperature 5W-40 CK-4), and not worry about it!

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Dave YaBB Moderator ModSquad Offline SuzukiSavage.com Rocks! Posts: 17808 Camp Springs, Kentucky Gender:	Re: Is it safe to use 10W30 engine oil instead 10W Reply #27 - 12/06/17 at 16:31:06 JLC wrote on 12/06/17 at 14:59:45: The one to get is the T6 ( CK-4) Extreme Temperature. Yes.....the one that is not yet available in stores!
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Re: Is it safe to use 10W30 engine oil instead 10W
Reply #28 - 12/06/17 at 16:43:07

norm92de wrote on 12/06/17 at 08:57:52:

JLC,
Don't feel bad I am as confused as you are. Why two different T6s???

Shell says the T6 in the CK-4 rating was developed to provide better protection for heat.....evidently the newer diesel engines run hotter.

Sounds perfect for an air cooled engine!

http://rotella.shell.com/products/pc-11.html

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JLC Senior Member Offline SuzukiSavage.com Rocks! Posts: 262 Black Forest, Colorado Gender:	Re: Is it safe to use 10W30 engine oil instead 10W Reply #29 - 12/06/17 at 19:28:00 Dave, I bought the new "Extreme temperature" T6 CK-4 oil a week ago or so in the Falcon (CO) WalMart. I assume it will be available in many other locations soon, if not already.
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