Originally Posted By: fdcg27
Your VW calls for an HTHS 3.5 minimum oil unless I'm seriously mistaken.
Any 0W-20 is a quality oil from any deposit control point of view, but it does not meet anything close to the minimum HTHS viscosity VW's recommended oils have. This mix will also likely have higher NOACK volatility than would VW cert oil.
You have reduced both the KV and the HTHS viscosities of the oil in your VW's sump.
Personally, I'd run this mix for another 3K miles. It is getting colder now so some loss in viscosity and increase in volatility should be okay.
I would avoid running the car really hard, and 70-75mph jaunts up a four lane limited access divided highway doesn't count as hard.
Your call, but I personally can't see any harm running this unintended mix out to your planned OCI.
How long did it take the VW to use this 1-1.5 liters of oil?
It may be that you can play amateur blender again before the end of this OCI and can use something much thicker for your next add, sort of evening things out.
Engines will typically do just fine on a wide range of KV grades, contrary to what some here believe.
We even had a now long-banned member who posted a series of UOAs from VAG turbo engines using API/ILSAC syns that didn't even pretend to meet VAG certs and these oils looked just fine in their UOAs, not beat up at all.
Er, thanks, I think I get the upshot. What about 30-minute jaunts at closer to 90 mph? Still not really pushing the engine, except maybe the odd acceleration burst (rev & pedal travel limiters notwithstanding). I seem to get 2-3K miles before I need to top up, which is about when it's due for a change anyways.
Your VW calls for an HTHS 3.5 minimum oil unless I'm seriously mistaken.
Any 0W-20 is a quality oil from any deposit control point of view, but it does not meet anything close to the minimum HTHS viscosity VW's recommended oils have. This mix will also likely have higher NOACK volatility than would VW cert oil.
You have reduced both the KV and the HTHS viscosities of the oil in your VW's sump.
Personally, I'd run this mix for another 3K miles. It is getting colder now so some loss in viscosity and increase in volatility should be okay.
I would avoid running the car really hard, and 70-75mph jaunts up a four lane limited access divided highway doesn't count as hard.
Your call, but I personally can't see any harm running this unintended mix out to your planned OCI.
How long did it take the VW to use this 1-1.5 liters of oil?
It may be that you can play amateur blender again before the end of this OCI and can use something much thicker for your next add, sort of evening things out.
Engines will typically do just fine on a wide range of KV grades, contrary to what some here believe.
We even had a now long-banned member who posted a series of UOAs from VAG turbo engines using API/ILSAC syns that didn't even pretend to meet VAG certs and these oils looked just fine in their UOAs, not beat up at all.
Er, thanks, I think I get the upshot. What about 30-minute jaunts at closer to 90 mph? Still not really pushing the engine, except maybe the odd acceleration burst (rev & pedal travel limiters notwithstanding). I seem to get 2-3K miles before I need to top up, which is about when it's due for a change anyways.
