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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 May 5th, 2018, 18:06   #1
GPM2010
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Default Rotella T6 on 2015 Passat TDI ?

User manual suggests 5w-30, yet T6 is 5w-40.

Would it be OK to use T6 ?

Only a bit thicker when hot. Anyone have issues with this upgrade ?
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Old May 5th, 2018, 19:53   #2
MichaelB
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Quote:
Originally Posted by GPM2010 View Post
User manual suggests 5w-30, yet T6 is 5w-40.

Would it be OK to use T6 ?

Only a bit thicker when hot. Does anyone have issues with this upgrade?
The 507 spec is more than the 5/30 vs 5/40 it is about low saps and the life of you dpf. If you use T6 your engine will not implode but will probably shorten the lifespan of your emission controls ie dpf.
What is so wrong with using an oil that was designed for your engine? Price? It is up to you. T6 will not protect your engine any better than a 507 spec oil

Last edited by MichaelB; May 5th, 2018 at 19:58.
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Old May 5th, 2018, 20:41   #3
GPM2010
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Am I missing something ?

What does the dpf have anything to do with the oil since it's fuel exhaust related ?
Over a bit heavier oil when hot.

I normally use Amsoil 5w-30 and are looking for a cheaper alternative to paying $12 a quart when I can get T6 for $5 a quart.
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Old May 5th, 2018, 21:04   #4
Victor Huge
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You need a low ash oil to keep the dpf from getting plugged to quickly (some oil still makes it out to exhaust).

I don't get you're spending more money on amsoil stuff when you could get the dealer oil for cheaper. How often are you changing the oil?
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Old May 5th, 2018, 21:11   #5
GPM2010
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Victor,

It recommends every 10k and I push it to 15k like Amsoil recommends.

I have an Amsoil dealer close by. Have been using the 5w-30 european version oil synthetic on my other two vehicles. The dealer uses Castrol
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Old May 5th, 2018, 21:30   #6
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Quote:
Originally Posted by GPM2010 View Post
Am I missing something?
Yes, you are! It has nothing to do with oil weight it has to do with low SAPS I can't believe someone who has been a member here since 2011 does not understand that. There are many 507 spec oils cheaper than your Amsoil.

Last edited by MichaelB; May 5th, 2018 at 21:37.
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Old May 5th, 2018, 21:30   #7
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Fair enough. From what I've read so far, some modern vehicles with dpfs can use it so take from that what you will, but i personally would be uncomfortable running it in my mk7 golf as the consensus is that it will shorten dpf life...

Your call, i used T6 for close to ten years in my mark 4 and it seemed to be a very good oil, but that was a much simpler engine.
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Old May 5th, 2018, 22:17   #8
GPM2010
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Mobil 1 103469 - Mobil 1 ESP Motor Oil From Summit Racing website has a case of it for $97 minus a $24 rebate. And meets the 507 specs. Sounded like a good deal considering Amsoil case would be $140....

The Rotella T6 is supposed to have a zinc additive to help lubricity in diesels they say.
I'll just use it in my 2014 Super Duty truck then.
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Old May 6th, 2018, 14:08   #9
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Quote:
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The Rotella T6 is supposed to have a zinc additive to help lubricity in diesels they say.
I'll just use it in my 2014 Super Duty truck then.
Zinc dialkyldithiophosphate (ZDDP) is the most commonly used anti-wear additive in motor oils. It contains both zinc and phosphorus components that work together to provide anti-wear protection and minimize lubricant breakdown.

The zinc antiwear additives are there to protect the flat tappet cams which none of the CR engines have, they all have roller rockers and don't benefit from the antiwear additive.

ZDDP will poison the dpf.
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Old February 5th, 2019, 09:01   #10
750HMF
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Rottela T6 also comes in a 5w30. Anyone here ever try it in there offroad only cars? I was debating if it's worth the switch due to it being a bit cheaper and rottela seems to have a good name for itself.

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Old February 5th, 2019, 09:29   #11
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I run T6 in my diesel and gas Land Rovers. Wouldn't run it in my VW TDIs.
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Old February 5th, 2019, 16:14   #12
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Originally Posted by 750HMF View Post
Rottela T6 also comes in a 5w30. Anyone here ever try it in there offroad only cars? I was debating if it's worth the switch due to it being a bit cheaper and rottela seems to have a good name for itself.

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I am not sure you can justify the cost/benefit vs a 507 oil. Of course is your call.
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Old February 5th, 2019, 17:20   #13
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No, but I ran Rotella, Chevron, Mobil, Amsoil, Peak(top up quart), and probably another one or two 5w40 oils. And Mobil and Rotella 0w40.
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Old February 5th, 2019, 18:15   #14
750HMF
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I am not sure you can justify the cost/benefit vs a 507 oil. Of course is your call.
What benefit is there of running 507 oil in an off-road setup passat? I thought the whole purpose of the 507 spec was to protect emissions systems. Otherwise CJ-4/CK-4 oil would work just as good? Just curious, that's all.

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Old February 5th, 2019, 19:53   #15
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750HMF, you have a point about the 'off-road' part. Then I would vote for an 0W-40 CJ-4/CK-4 that is not predominantly Group III oil base stock and relatively high TBN. Amsoil, Mobil (Delvac 1) and Shell T6 (might be hard to find in 0W-40) brands (in alphabetical order) have one with fairly good reputations.

The above is not an exclusive list. There are of course other brands that also meet the above criteria and the cost/benefit changes depending how many miles you put on average per year.
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