You’re into this experiment for awhile, now.
You could increase both viscosity and cleaning effectiveness by simply adding straight HPL Euro 0W30. I don’t see how a slight increase in viscosity would bring an increase in ring wear, but it might directly decrease your consumption.
I think low tension of the rings is more likely than carbon in the grooves reducing the ring mobility, but perhaps it’s both. The slight difference in viscosity between your 0W20 isn’t going to change how much oil is in the rings, but the increase in solvency from straight HPL should increase the rate at which things get cleaned up.
Personally, I would just drain this oil, fill ‘er up with the HPL 0W30, then check the consumption. Change the filter in a couple thousand miles, see what it caught.
You could increase both viscosity and cleaning effectiveness by simply adding straight HPL Euro 0W30. I don’t see how a slight increase in viscosity would bring an increase in ring wear, but it might directly decrease your consumption.
I think low tension of the rings is more likely than carbon in the grooves reducing the ring mobility, but perhaps it’s both. The slight difference in viscosity between your 0W20 isn’t going to change how much oil is in the rings, but the increase in solvency from straight HPL should increase the rate at which things get cleaned up.
Personally, I would just drain this oil, fill ‘er up with the HPL 0W30, then check the consumption. Change the filter in a couple thousand miles, see what it caught.
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