T7 TDI oil consumption

[Stephen77123]

Hi all,

I'm interested in getting feedback from other T7 diesel owners about oil consumption before going back to VW concerning our own 2025 T7 Ocean TDI.
The low oil level warning light first came on after around 5000km during a trip to Switzerland and was hence taken into a local VW dealer who topped up the level. The van has now clocked up over 40000km of otherwise pleasurable travels but has continued to guzzle expensive 0W20 oil at a rate of around 1 litre per 5000km at best. This is in sharp contrast to the many petrol and diesel vehicles I've owned or had as company cars over the years which generally go between service intervals (typically 20 or 30000km) without needing additional oil.
I'm a (recently retired) engine design/development engineer by profession so not exactly a beginner on this subject !
There are no apparent oil leaks under the van (this was checked during the first service at 30000km whilst the under tray was removed) and there is no visible smoke in the exhaust at engine start up or under load so the valve stem seals and piston rings should be ok.
I've read threads discussing high oil consumption on earlier Cali models (T6 biturbo etc) and mentioning a VW official limit of 0.5 litres per 1000km but not seen anything specifically about the T7 TDI so would welcome any information about the latter even if it's only to say that you have no problem. Has your T7 TDI needed an oil top up between service intervals ? If so how often ?
Thanks for any feedback you can give before I take this up again with our VW garage.

Cheers
Steve

 

[sidepod]

Wasn’t there an identical post a few weeks back? Same vehicle.

Given your job I think you know the answer. This level of consumption is bollox.

You’re effectively replacing 50% of the oil capacity between services which makes the service virtually pointless.

My theory on this is the design tolerances are based around a highly calculated friction level to achieve a given fuel consumption.
Add in the water-thin 0w30 oil that’s specified and oil dilution from dpf regens and you very easily defeat the sealing capabilities of the engine parts.

You could try an experiment. Use 5w40 instead and change it every 6k. See if the consumption changes.

 

[cangyroo]

Volkswagen has published guidance in previous owner manuals which is reflected as a 'Technical Service Bulletin' around oil consumption .... See attached PDF ... page 1 it states:

"Volkswagen oil consumption standard of up to 0.5 quarts per 600 miles, or 0.5 liters per 1000 km."​

So if it's higher than this.... then I guess VW would investigate as the bulletin outlines.

Personally, I would not advise changing the oil viscosity from the VW recommended of 0W-20.
Volkswagen doesn't simply take an older diesel engine and fill it with thinner oil. The engine's lubrication requirements, operating temperatures and component design are engineered around this specified oil.

My 2026 T7 engine code is DZLA … I've done 4,500 miles, and I have topped up with 300 mls so far... I've not waited for the oil warning light... I just check the dip stick regularly. As well as VW's advisory, there’s a lot of information online around the design and tolerances of this particular engine, and what is an acceptable oil consumption, (and why it happens). I'm expecting (hoping) that I will be using less oil as my mileage increases, as all the components bed in and become better sealed.

 

[stoobthealien]

Had the light come on just as we drove onto the ferry to go to the Netherlands (typical!) - at around 5500 miles - took it to a VW Garage over there and they put in about half a litre (I have the other half of the expensive bottle in the van still!)

 

[Stephen77123]

Hi
Many thanks for your various comments. Sorry not to have reacted earlier, I thought I would get a prompt when a reply came in. Or I was looking the other way ...
From your replies I'm (slightly) reassured to see that ours is not the only van that needs oil top ups between services though I was hoping to get more feedback given that there must be a large population of T7 TDI's out there by now.
So if you have a T7 TDI, whether it has high or low mileage, please please reply on this so I can go back to VW with more data to argue my case. To repeat my original question "Has your T7 TDI needed an oil top up between service intervals (yes/no) ? If so how much / how often ?"
Cheers
Steve

PS sidepod
I had toyed with the idea of using a higher viscosity oil but not whilst the van is under guarantee. As you point out the the thin oil is certainly used to reduce fuel consumption and hence pollution levels.

 

[Chriskend]

A 1/4 ltr at about 2500mls so far

 

[cangyroo]

A 1/4 ltr at about 2500mls so far

I presume you have a 2.0L TDI?
If so, that's well within VW's published guidance of 568 ml per 600 miles... therefore your oil consumption is approximately 89.4% lower than VW's maximum expected.

 

[2into1]

These silly VW guidelines were thrown about when the 180 T5.1 engines were clearly disintegrating

 

[Chriskend]

I presume you have a 2.0L TDI?
If so, that's well within VW's published guidance of 568 ml per 600 miles... therefore your oil consumption is approximately 89.4% lower than VW's maximum expected.

Yup, I’ll check it again at 5000

 

[blind_oracle]

I bought mine 2.0 TDI off dealer at ~5000 km and then at 14k km I think the car told me "add 1 liter of oil when possible". I checked the oil plug and it was on minimal level (or below it), so I just poured 1 litre there.

0.5l mentioned above per 1000km seems excessive.