Just another UOA i'm sharing. I put in 0w30 Castrol again but I will probably switch back to Castrol 0w40 because it can be had a bit cheaper due to the 5quart jugs. I got the 0w30 on sale so had enough for about 3 oil changes. I couldve ran this out a little longer but I change oil based on when I have free time / day off so sometimes they'll be done a little earlier as seen in this one. Otherwise I think 4-5k intervals are easily fine. This oil run was filled with many hot temperature long drives in the desert - 100F-120F days for 200-300 miles at a time while pretty heavy on the gas w/ a/c on. Also is a daily driver for work which is only about 7-9 miles each way. Nonetheless did just fine.
2016 Subaru STi, 37.8k miles, 2.9k miles OCI Castrol Euro 0w30 LL01 w/ OE filter
- Thread starter JamesGames
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Based on your 3.5k run, even on the Xw30 you should still be more than fine at 4k. Probably 5k, but I hate wasting capable oil in the half-witted “oil is cheap, engines are not” argument with folks who think oil is “expensive” when the oil’s $70 for 15k miles, but not when it’s $24 for 5k miles. If you truly treasure your mechanical devices, the correct lubricant is priceless, not expensive. And by no means am I saying the most expensive is necessary, but remember to calculate labor & filter costs as well.
My point was castrol 0w30 / 0w40 is so similar that I'd just go for the 0w40 - 0w40 is $27.99 for 5 quarts vs 0w30 $49 for 6 quarts.Based on your 3.5k run, even on the Xw30 you should still be more than fine at 4k. Probably 5k, but I hate wasting capable oil in the half-witted “oil is cheap, engines are not” argument with folks who think oil is “expensive” when the oil’s $70 for 15k miles, but not when it’s $24 for 5k miles. If you truly treasure your mechanical devices, the correct lubricant is priceless, not expensive. And by no means am I saying the most expensive is necessary, but remember to calculate labor & filter costs as well.
Same price I'd take the 0w30 though.
As a fellow Subaru EJ turbo owner, I second the notion that Castrol Euro 0w30 is awesome sauce for our engines. 0w40 probably also OK. Not sure which boutique options would do better. I’ll pay extra to not use Mobil 1 or Pennzoil in this engine family (at least the turbo’s). Local tuner thinks 10w-40 is minimum, pushing Motul, while their competitor pushing LiquiMoly, but good ol GC / BC rocks this engine though maybe they know something about racing I have no concern for.
To the naysayers, what result here are you not happy about? What non-UOA benefit would you point to?
Rock on Jamesgames.
PS, if you ever get a direct injection engine, bail out on Blackstone. Maybe don’t wait. But at least you shouldn’t have fuel dilution issues with the EJ that Blackstone can’t seem to understand.
By the way, I have no issue doing 4500-5000 mi OCI’s (with the Castrol Euro). Maybe that is even too conservative.
To the naysayers, what result here are you not happy about? What non-UOA benefit would you point to?
Rock on Jamesgames.
PS, if you ever get a direct injection engine, bail out on Blackstone. Maybe don’t wait. But at least you shouldn’t have fuel dilution issues with the EJ that Blackstone can’t seem to understand.
By the way, I have no issue doing 4500-5000 mi OCI’s (with the Castrol Euro). Maybe that is even too conservative.
Lol look at my signature. 3/5 cars are DI, But yea, I know their fuel dilution numbers seem a bit weird.
One of the reasons I do UOA at shorter intervals is to catch possible issues. Yes a waste of money but its not much money - every UOA i post up I get people telling me I'm wasting money. I am here to admit I am ok with that.
JamesGames
Keep doing what you're doing!
Keep doing what you're doing!
Here's an old uoa where BS said to keep an eye out at 4 ppm's:One of the reasons I do UOA at shorter intervals is to catch possible issues. Yes a waste of money but its not much money - every UOA i post up I get people telling me I'm wasting money. I am here to admit I am ok with that.
https://bobistheoilguy.com/forums/threads/13-subaru-wrx-rt6-3-412mi-elevated-silver.226493/
Jeez, that thread is 10 years old. I can't believe the random oil related things that I remember.
Seemed to be more common on 2013's/14's and you can find more with a Google search.
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More than just weird. They estimate the fuel% by the flashpoint. There have been several people here who have sent the same sample to BS and another lab that uses gas chromatography, and BS is consistently low on their estimate by 2-3x. I.e, when BS estimates 2%, the actual result is 4-6%.
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