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Discussion Starter #1
Ok I have done some searches both here and on google and I am still none the wiser.

My 2.5TDi (88hp) T4 has a 506 sticker on the slam panel.

GSF and Eurocar parts recommend carlube 5w40 fully synth triple R but that doesn't meet 506, only 505.01 for PD engines.

There is also a semi-synth version at the same spec which is cheaper but not widely available.

I gather that the 2.5 doesn't use a PD anyway.

10w40 would seem a more appropriate viscosity for a uk climate in an 120k + mile engine.

Now. I don't mind paying for the fully synthetic stuff if thats whats needed but I would prefer to use a cheaper 10w40 semi oil if thats all thats required, and change it twice a year.

So which oil? And why does it say 506?

Does anyone have a final definitive answer?
 

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I dunno what's so special about your 88hp but my '99 version says 505.00 on the slam panel.

Maybe yours is the newer type which has oil sensors and runs a variable service schedule - also called long life.
If so I though that was optional?
I use 10w40 semi but would also use a 5W40 fully synth.

Just for reference here are the VW oil codings for diesel engines....

VW 505.00 - Passanger car diesel engine oil, minimum performance level CCMC PD-2. Lists viscosities:- SAE 5W-50, 10W-50/60, 15W-40/50, 20W-40/50 requiring 13% max evaporation loss and SAE 5W-30/40, 10W-30/40 requiring 15% max evaporation loss.

VW 505.01 - Special engine oil for VW turbodiesel with pump-injector-unit and for the V8 commonrail turbodiesel engines. Meets ACEA B4 SAE 5W-40 spec.

VW 506.00 - Special long-life engine oil for turbodiesel engines with WIV, viscosity is SAE 0W-30.

VW 506.01 - Special long-life oil for turbodiesel engines with pump-injector-unit with WIV.

VW 507.00 - Long-life diesel engine oil with WIV.




info ripped from here
 

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Discussion Starter #3
Mine's a 2003 but if its got oil sensors they are not telling me anything as far as I can tell. I'm not keen on a long-life option - I actually quite like changing the oil - sad I know - but I get a feeling of satistaction from doing it. If the sump plug isn't seized that is.
 

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Just found out that WIV stands for - extended drain periods up to 30,000km or 24 months.

So I'd say 506.00 is the longlife version of 505.00, and as far as I can tell 505.00 is just plain old semi synth that meet VW standards. The 506.00 might just be a fully synth version.

I only do about 3,000 miles in any 12 month period so I suppose it might pay to move up to the 506 next time and only change every other year - it's certainly tempting..:D
 

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Discussion Starter #5
So I'd say 506.00 is the longlife version of 505.00, and as far as I can tell 505.00 is just plain old semi synth that meet VW standards. The 506.00 might just be a fully synth version.
I'd go along with half of that - 506 seems like the long life version.

However 505 seems to be available in semi and fully synth versions.

Just found this:

opieoils: vw spec oils
 

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yeh, maybe I put that badly..

It seems to be that only fully synthetic oil meet the 506.00 spec., which would make sense.
Also if your not going to do the full mileage between annual changes then it seems a waste to run fully synth, that is unless you can get a good deal on it.
 
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