Oil Question Again

**BradC** · 11th February 2023, 02:21 PM

Originally Posted by shanegtr

next longest distance of the 5w30 is 14500 which is not really that far behind so I dont think there would be anything strange going on with the oil there. That particular sample was from way back in 2015 so I cant remember if there was any particular operating conditions that could have affected the results.

Out of interest, when did you replace the oil cooler? I recall you mentioning that was prompted by a specific elevated level but I can't recall which one.

**shanegtr** · 11th February 2023, 06:44 PM

Originally Posted by BradC

Out of interest, when did you replace the oil cooler? I recall you mentioning that was prompted by a specific elevated level but I can't recall which one.

Sodium and Potassium. First showed up in sample Feb 2019 and I procrastinated over it until changing the cooler in December 2020

**101RRS** · 11th February 2023, 07:17 PM

I find it amazing that over the past couple of years we must have had at least 10 threads or at least closely related on this very subject of oil for the TDV6 with each one having exactly the same arguments from exactly the same people with the issue never getting resolved.

Time to move on and just research the old threads if new questions pop up.

Garry

**PerthDisco** · 11th February 2023, 08:57 PM

Originally Posted by shanegtr

Sodium and Potassium. First showed up in sample Feb 2019 and I procrastinated over it until changing the cooler in December 2020

Essential for healthy bones and teeth

**DiscoDB** · 11th February 2023, 09:21 PM

Originally Posted by 101RRS

I find it amazing that over the past couple of years we must have had at least 10 threads or at least closely related on this very subject of oil for the TDV6 with each one having exactly the same arguments from exactly the same people with the issue never getting resolved.

Time to move on and just research the old threads if new questions pop up.

Garry

So I did a search, couldn’t find any previous discussions about 5W-Dumbass

**DiscoDB** · 11th February 2023, 09:48 PM

Originally Posted by shanegtr

next longest distance of the 5w30 is 14500 which is not really that far behind so I dont think there would be anything strange going on with the oil there. That particular sample was from way back in 2015 so I cant remember if there was any particular operating conditions that could have affected the results.

What is impressive with your data is you have some high kms between oil changes in there and yet you are not seeing any accelerated wear even when you extend beyond 20,000kms.

With the extended oil change intervals did you see a drop in viscosity or any fuel contamination?

**BradC** · 11th February 2023, 10:11 PM

Originally Posted by 101RRS

I find it amazing that over the past couple of years we must have had at least 10 threads or at least closely related on this very subject of oil for the TDV6 with each one having exactly the same arguments from exactly the same people with the issue never getting resolved.

Time to move on and just research the old threads if new questions pop up.

But then what would we have to argue about?

**DiscoJeffster** · 12th February 2023, 12:21 AM

Originally Posted by DiscoDB

What is impressive with your data is you have some high kms between oil changes in there and yet you are not seeing any accelerated wear even when you extend beyond 20,000kms.

With the extended oil change intervals did you see a drop in viscosity or any fuel contamination?

Shock horror, not. So much FUD out there.

**DiscoDB** · 12th February 2023, 07:06 AM

Originally Posted by DiscoJeffster

Shock horror, not. So much FUD out there.

Certainly none here based on Shanes’s oil sampling data.

**shanegtr** · 12th February 2023, 08:16 AM

Originally Posted by DiscoDB

What is impressive with your data is you have some high kms between oil changes in there and yet you are not seeing any accelerated wear even when you extend beyond 20,000kms.

With the extended oil change intervals did you see a drop in viscosity or any fuel contamination?

2023-02-12_5-59-59.jpg
Statistically no issues. I've pointed out the 3 samples that where very close to 20,000kms on the oil and above. Viscosity no issues at all, there was one sample with a small increase in fuel (2% vs 1%) but not worth worrying about - anything >5% is where I draw the line for fuel. Total base numbers where a little lower but that is to be expected as the additivities are neutralizing acids over time - still plenty in reserve so again no issues. Soot levels are fairly stable all round.
I mainly pushed the big oil changes as a test to see how the oil would hold up, especially considering the 24,000km service intervals on the 3L. Overall, I generally have no issues with the oil condition with the longer change intervals.

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