Just a history of this car; purchased it new, use the car on track occasionally, it is pretty much stock except for sticky street tires and race brake pads. Car has direct injection, it is a flat 4, 2.0L, premium fuel.
My first UOA was the German Castrol 0w30 with 998 miles on the oil, including 2 days on track. I didn't like how high the oil temps were getting on track (hovered in the high 280's, low 290's, and touched 300*), so that is why I switched to the Toyota SN 0w20.
Second UOA is with the Toyota SN 0w20 with a little over 2,000 miles on the oil, including 4 days on track. Oil temps dropped almost 10* overall on track (averaged high 270s up to the mid 280s).
I always use the OEM Subaru oil filer.
Let me know your thoughts on the UOA. I am a bit worried about the low flashpoint with the Toyota 0w20, so I am planning on running Redline 0w20 or Motul 300v 0w20 next time around.
Here is the UOA with the Toyota 0w20 in the left column and the GC 0w30 in the right column, with the averages in the middle:
Also, here are my follow up questions to Blackstone and their responses after each UOA:
FIRST UOA
ME:
I use the car a lot for track days. This was after two days on track, with approximately 250 track miles. Do you see any issue with running longer on the same oil? The oil temps were in the 290*s, so that is why I was worried about running more than two days on this oil. I just recently completed a single day event on Toyota 0w20, which I will be sending in a sample of as well after the next track day.
BLACKSTONE:
Running longer on the oil shouldn't be a problem. The oil itself was fine in your sample, and the wear levels weren't unexpected for a new engine, so we don't see why not. When running more track days on the oil, you might see some of the wear metals reading higher than average, but that's normal with engines used for racing. You could try increasing your oil runs slowly (say, adding one more track day or 300-500 miles to the previous run), and seeing how your engine and oil are handling that kind of use.
SECOND UOA:
ME: Few questions regarding the report. Is the flashpoint of 380*f for the Toyota 0w20 something to be concerned about for track usage? I noticed the flashpoint of the 0w30 German Castrol was much higher at 425*f. With the cSt viscosity @ 100*c being much lower than the previous sample of 0w30 German Castrol, do you think this Toyota 0w20 is still offering good protection for track use? The one thing I did not like about the 0w30 was oil temps would get close to 300*f on track, with the increased viscosity. Also, I noticed the first sample shows
BLACKSTONE:
Thanks for the question. Let me give you a little background. We use the flashpoint test to calculate the amount of fuel present. Each oil has a certain staring point (and that's where we get our should-be values). When we run the flashpoint test, your results should be above the "should be" value. That was the case with your first sample, so we wrote So in your sample here, the flashpoint was a little below the should-be value, which means there's something in the oil lowering the flashpoint. In this case, we suspect it's fuel (unless you're dumping paint thinner in the engine or something like that, but if that's the case, then Lord help us all!) Because your flashpoint was pretty close to the should-be value, we calculated fuel at just a trace. Not a lot, but enough that it did lower the flashpoint some.
So hopefully that helps answer your questions on the flashpoint.. but if you need more information, let me know.
As far as the viscosity, yes, the 0W/20 is a bit thinner than the 0W/30 you were using before. It didn't seem to hurt wear any -- after all your metals are better here than they were. I'd say the 0W/20 is giving you good protection. And if it's keeping temps where you want them, then by all means stick with it. It seems to be doing just fine!
My first UOA was the German Castrol 0w30 with 998 miles on the oil, including 2 days on track. I didn't like how high the oil temps were getting on track (hovered in the high 280's, low 290's, and touched 300*), so that is why I switched to the Toyota SN 0w20.
Second UOA is with the Toyota SN 0w20 with a little over 2,000 miles on the oil, including 4 days on track. Oil temps dropped almost 10* overall on track (averaged high 270s up to the mid 280s).
I always use the OEM Subaru oil filer.
Let me know your thoughts on the UOA. I am a bit worried about the low flashpoint with the Toyota 0w20, so I am planning on running Redline 0w20 or Motul 300v 0w20 next time around.
Here is the UOA with the Toyota 0w20 in the left column and the GC 0w30 in the right column, with the averages in the middle:
Also, here are my follow up questions to Blackstone and their responses after each UOA:
FIRST UOA
ME:
I use the car a lot for track days. This was after two days on track, with approximately 250 track miles. Do you see any issue with running longer on the same oil? The oil temps were in the 290*s, so that is why I was worried about running more than two days on this oil. I just recently completed a single day event on Toyota 0w20, which I will be sending in a sample of as well after the next track day.
BLACKSTONE:
Running longer on the oil shouldn't be a problem. The oil itself was fine in your sample, and the wear levels weren't unexpected for a new engine, so we don't see why not. When running more track days on the oil, you might see some of the wear metals reading higher than average, but that's normal with engines used for racing. You could try increasing your oil runs slowly (say, adding one more track day or 300-500 miles to the previous run), and seeing how your engine and oil are handling that kind of use.
SECOND UOA:
ME: Few questions regarding the report. Is the flashpoint of 380*f for the Toyota 0w20 something to be concerned about for track usage? I noticed the flashpoint of the 0w30 German Castrol was much higher at 425*f. With the cSt viscosity @ 100*c being much lower than the previous sample of 0w30 German Castrol, do you think this Toyota 0w20 is still offering good protection for track use? The one thing I did not like about the 0w30 was oil temps would get close to 300*f on track, with the increased viscosity. Also, I noticed the first sample shows
BLACKSTONE:
Thanks for the question. Let me give you a little background. We use the flashpoint test to calculate the amount of fuel present. Each oil has a certain staring point (and that's where we get our should-be values). When we run the flashpoint test, your results should be above the "should be" value. That was the case with your first sample, so we wrote So in your sample here, the flashpoint was a little below the should-be value, which means there's something in the oil lowering the flashpoint. In this case, we suspect it's fuel (unless you're dumping paint thinner in the engine or something like that, but if that's the case, then Lord help us all!) Because your flashpoint was pretty close to the should-be value, we calculated fuel at just a trace. Not a lot, but enough that it did lower the flashpoint some.
So hopefully that helps answer your questions on the flashpoint.. but if you need more information, let me know.
As far as the viscosity, yes, the 0W/20 is a bit thinner than the 0W/30 you were using before. It didn't seem to hurt wear any -- after all your metals are better here than they were. I'd say the 0W/20 is giving you good protection. And if it's keeping temps where you want them, then by all means stick with it. It seems to be doing just fine!
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