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#2330292 - 07/28/11 11:00 AM Shell Rotella T 5w40 VOA
BobFout Offline


Registered: 03/23/09
Posts: 2957
Loc: Indiana
Shell Rotella T 5w40 (API CJ-4, CI-4+, CI-4, CH-4, CG-4, CF/SM), Cummins CES 20081, Cat ECF-2 and ECF-3, DD 93K218, Mack E0-0 Premium Plus, MB 228.31, Volvo VDS-4





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2003 VW Jetta TDI (Sold) / 2015 VW GTI 2.0T

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#2330398 - 07/28/11 12:31 PM Re: Shell Rotella T 5w40 VOA [Re: BobFout]
chubbs1 Offline


Registered: 06/09/10
Posts: 4574
Loc: Merritt Island FL, USA
Virtually no difference from the T6. That being said its hard to say which oil would have better TBN retention, low temp performance etc. I think I would choose this over the T6 with price factored in.
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#2330996 - 07/29/11 12:10 AM Re: Shell Rotella T 5w40 VOA [Re: chubbs1]
BobFout Offline


Registered: 03/23/09
Posts: 2957
Loc: Indiana
Originally Posted By: chubbs1
Virtually no difference from the T6. That being said its hard to say which oil would have better TBN retention, low temp performance etc. I think I would choose this over the T6 with price factored in.


The CJ-4 RTS to CJ-4 T6 transition (this has been about 2 years ago) was mostly a base-stock and/or VII change.
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2003 VW Jetta TDI (Sold) / 2015 VW GTI 2.0T

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#2331230 - 07/29/11 09:32 AM Re: Shell Rotella T 5w40 VOA [Re: BobFout]
sm00thpapa Offline


Registered: 07/09/11
Posts: 898
Loc: Spring Hill, FL
Well for bikes it makes a difference. T6 is JASO MA certified and the T isn't.
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#2331310 - 07/29/11 11:01 AM Re: Shell Rotella T 5w40 VOA [Re: sm00thpapa]
Quattro Pete Offline


Registered: 10/30/02
Posts: 32162
Loc: Great Lakes
Originally Posted By: sm00thpapa
Well for bikes it makes a difference. T6 is JASO MA certified and the T isn't.

Mostly likely only because SOPUS didn't bother to have it tested against JASO MA before.

The add pack hasn't changed, and that's the main determinant of the friction modifier test results of JASO MA spec.
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#2449189 - 11/30/11 12:07 PM Re: Shell Rotella T 5w40 VOA [Re: BobFout]
Loobed Offline


Registered: 07/20/07
Posts: 3742
Loc: Northern California, USA


Is the numbers for magnesium and calcium reversed?

Calcium seems low for such high TBN @ 786

Does the magnesium compensate for the calcium?
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#2491041 - 01/12/12 10:03 AM Re: Shell Rotella T 5w40 VOA [Re: BobFout]
shpankey Offline


Registered: 12/21/09
Posts: 1577
Loc: Tulsa, Oklahoma, USA
Yes, as I understand it anyways.
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#2501235 - 01/21/12 12:21 PM Re: Shell Rotella T 5w40 VOA [Re: BobFout]
Gokhan Offline


Registered: 12/29/10
Posts: 2307
Loc: Los Angeles, California
I would personally stay away from this oil because its Ca / Mg ratio is less than 1 (well less than 1 indeed). Mg is certainly corrosive and increases wear at high ratios; although, it's a good TBN retainer (helps retain initial TBN).

Answering question on high initial TBN, both Mg and Ca will result in increasing the high initial TBN. They both come from detergents, which means they are both bases (as in total base number [TBN]).

I like the high ZDDP (phosphorus) though. But the unusually large ratio of Mg in this oil is enough for me not to consider it.

Thanks for the VOA, as always.
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