Idemitsu 5W-30 SP/GF6, 3.4k miles, 23 Subaru Outback 2.5 DI

[Zenon]

600 miles of local driving then 2800 miles VT to Newfoundland road trip. The car was loaded with people and lots of camping gear.
Attached VOA sample values (green) are from the same oil container.
Probably a good oil choice for winter too, seeing always gas dilution.
Any thoughts?

 

[fantastic]

It looks good & if fuel goes up to like 4-5% then try 5w-40 but I don't think you'll need to do that. What grade does Subaru spec for this out of curiosity?

 

[himemsys]

What type of driving conditions for the first sample? The one with the 2.2% fuel. I was going to say the 2800 mi road trip had to do wonders for the fuel dilution, but it's still higher at 2.6% than that first sample. The rest of the report looks amazing, as is usually the case for an OCI with mostly highway miles.

 

[Zenon]

It looks good & if fuel goes up to like 4-5% then try 5w-40 but I don't think you'll need to do that. What grade does Subaru spec for this out of curiosity?

0w-20 is recommended in US. I believe 5w-30 is prescribed in Australia for the same engine.

 

[Zenon]

What type of driving conditions for the first sample? The one with the 2.2% fuel. I was going to say the 2800 mi road trip had to do wonders for the fuel dilution, but it's still higher at 2.6% than that first sample. The rest of the report looks amazing, as is usually the case for an OCI with mostly highway miles.

First sample was 80% local / 20% highway.
My guess is 2.6% fuel may have connection with higher DI engine load?

 

[wareze]

Wish I could find this oil locally

 

[bluesubie]

I think the fuel dilution is pretty decent compared to most Subaru DIT's. Highway driving doesn't seem to have much of an impact on fuel in the DI or DIT engines.

Was the VOA submitted with the UOA?

 

[Zenon]

I think the fuel dilution is pretty decent compared to most Subaru DIT's. Highway driving doesn't seem to have much of an impact on fuel in the DI or DIT engines.

Was the VOA submitted with the UOA?

VOA and UOA originated from the same 5qt bottle. VOA was made earlier in March 2024 and UOA in June 2024.

VOA
https://bobistheoilguy.com/forums/threads/idemitsu-5w30-sp-gf-6-voa.381001/

 

[OneLonelyBurrito]

Thanks for sharing, the report looks excellent. I wouldn't be concern with a fuel dilution reading of 2.6%, that is pretty minimal. I would say you can definitely run the oil further if you want too.