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Fuels & Lubricants Discussion all about Fuels & Lubricants. synthetic oil, conventional oil, brands, change intervals, diesel grades, gelling and such debated items like that. Non TDI related postings will be moved or removed. This forum is NOT for the discussion of biodiesel and other alternative fuels.

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Old February 8th, 2012, 12:24   #46
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Originally Posted by lilspoon View Post
I have always heard from fellow friends/mechanics that rotella is not the greatest oil to use. I will probably run valvoline like I have in all my diesels.
Just my opinion. Worries me that the dealers have stopped using 5w40 though.

It's your car man. 5w 30 eats cams and pisses metal shavings through your engine. Who cares what VW says. They deny the facts!
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Old February 8th, 2012, 13:17   #47
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Originally Posted by lilspoon View Post
I have always heard from fellow friends/mechanics that rotella is not the greatest oil to use. I will probably run valvoline like I have in all my diesels.
Just my opinion. Worries me that the dealers have stopped using 5w40 though.
Don't confuse the different oils that Shell sells under the Rotella name. The conventional Rotella T 15w-40 has definitely fallen from being the awesome oil it once was. At the very least there are a lot better conventional HDEO 15w-40 oils out there, like Delvac 1300 Super.

Rotella T6, is absolutely one of the best synthetic HDEOils you can find, no question in my mind.

T = Crap.
T6 = Excellence.
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Old February 8th, 2012, 14:40   #48
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Worries me that the dealers have stopped using 5w40 though.
You CAN get a 5w40 505.01, which is also MB 229.51. It is currently available at dealers, you may have to demand it be used in your PD, which is perfectly acceptable.
The oil is Castrol Edge Turbo Diesel, VW/Audi Part number: G 052167M2
SAE 5w40, fully synthetic motor oil.
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Old February 8th, 2012, 16:52   #49
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Originally Posted by Jnitrofish View Post
Don't confuse the different oils that Shell sells under the Rotella name. The conventional Rotella T 15w-40 has definitely fallen from being the awesome oil it once was. At the very least there are a lot better conventional HDEO 15w-40 oils out there, like Delvac 1300 Super.

Rotella T6, is absolutely one of the best synthetic HDEOils you can find, no question in my mind.

T = Crap.
T6 = Excellence.
Rotella T 15w40 still has a good truck (medium and big) following, it can't be a bad oil.
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Old February 8th, 2012, 16:59   #50
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Rotella T 15w40 still has a good truck (medium and big) following, it can't be a bad oil.
We use Rotella T 15w-40 on most of the four-stroke marine engines here. Never a problem. I consider it a good oil.
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Old February 8th, 2012, 17:31   #51
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The four banger TDI does not get very hot, so a 15w-40 might be on the heavy side if your not doing long hard driving and will hurt fuel economy in short trip driving.
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Old February 8th, 2012, 19:41   #52
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there you go.
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Old February 8th, 2012, 19:48   #53
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Thanks for the confirmation. It's nice to be able to use the same oil in the PD and motorcycle. Cheap too at Wally World.
check and make sure you can use it on the bike....would really suck wiping out the drive train on the bike buy not using a suitable
oil for wet clutches
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Old February 8th, 2012, 20:13   #54
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I admit I was a little bit hard on Rotella T, calling it crap and all, but on my personal list, Rotella T would be pretty low. My short list for 15w-40 would be: Delvac, Supertech (Walmart), Delo, Motorcraft, Rotella T, other house brands.
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Old February 8th, 2012, 20:25   #55
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Originally Posted by Dieselducky View Post
check and make sure you can use it on the bike....would really suck wiping out the drive train on the bike buy not using a suitable
oil for wet clutches
T6 is JASO MA, the previous version (RTS) was not.
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Old February 9th, 2012, 06:17   #56
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there you go.
Here is the problem with the new formulations( Mobil 1 TDT and T6) and the TBN count. I just finished reading a study on Magnesium vs calcium on actual field tests. The conclusion was Magnesium by itself, plus wear metals and TBN showed that wear metals especially bearing metals started at a higher TBN and that TAN should also be taken into account. Calcium did better by itself than Magnesium but not much better with iron wear. The conclusion was that 6 to 1 ratio of calcium and magnesium resulted in the best wear of all metals. Both TDT and T6 have a 50/50 ratio.

The white paper conclusion was much more complicated as it was designed for the commercial truck analysis side of the business. My conclusion based on the field testing was you change out oil sooner than what the TBN indicates when you have doses of magnesium at greater than a 6 to 1 ratio.

Tool Slick has refined this to looking at the Boron count versus what the Boron starts out at and when that count gets down as another indicator.

I would say do not go by the TBN in the above oil analysis. The wear metals and the boron say you should change sooner.

Now if you just put the above aside and just say i am going to change at 10,000 miles, I think that would probably the easiest solution.
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Old February 9th, 2012, 07:18   #57
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Originally Posted by Joe_Meehan View Post
505.01 and 5w40 are not VW specific specs.
??? 505.01 is a VW specific specification...

There are official 505.01 oils not sold by VW of America. Lots of them, but they can be hard to find at local retailers. That Valvoline 5w40 I've seen around.
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Old February 27th, 2012, 05:53   #58
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Rotella T 15W40 can't be all bad as a friend changes the oil in his 2003 Dodge diesel only once a year and he puts on 80,000 km's a year on the truck and the truck now has over 650,000 km's on it and still runs great so the 15W40 can't be all bad. Syn., are better but with the 2003 truck above it makes me wonder some what. I have one thing to ask is the Shell T 6 a true syn., a type 4, or is it just a group 3 syn.?
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Old February 27th, 2012, 06:41   #59
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I'm not going to ever be able live down saying Rotella T was crap...

T6 is a group III with some group IV tossed in for good measure.
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Old February 27th, 2012, 07:11   #60
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Originally Posted by FXDL View Post
Rotella T 15W40 can't be all bad as a friend changes the oil in his 2003 Dodge diesel only once a year and he puts on 80,000 km's a year on the truck and the truck now has over 650,000 km's on it and still runs great so the 15W40 can't be all bad. Syn., are better but with the 2003 truck above it makes me wonder some what. I have one thing to ask is the Shell T 6 a true syn., a type 4, or is it just a group 3 syn.?
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I'm not going to ever be able live down saying Rotella T was crap...

T6 is a group III with some group IV tossed in for good measure.
T6 is Group III+. No PAO, and no typical Group III.
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