2014 Subaru Forester 6MT 2.5L NA
ODO: 106,036
Consumed: ~1 qt
Top up: 0.5 qt
Miles on oil: 106,036 - 103,434 = 2,602
Estimated hours on OCI: 2,602/42 = 62
Out: 5 quarts mix (2.5 quarts came from prior D&F)
In: 5.5 quarts blend (5 quarts Supertech 20w-50 + 4 quarts QS Euro 5w40 + 1 qt ETO2197)
Off: N/A; starting round 2
Estimated hours on filter: 62
Miles on filter: 2,602
On: XG3593A
Had to replace the CV axle on the front passenger side. I drove my 2.0L Escape to work and blotted the oil on it. The blot developed with far less darkness throughout, and the oil was far less dark on the dipstick. I couldn't quite understand why the difference; maybe it left me unsettled on the age/time on the oil enough to just do the D&F. ...Very slightly lower consumption this OCI.
2014 Subaru Forester 6MT 2.5L NA
ODO: 110,151
Consumed: ~1.5 qt
Top up: 1.0 qt
Miles on oil: 110,151 - 106,036 = 4,115
Estimated hours on OCI: 4,115/42 = 98
Out: 5 quarts mix (5 quarts Supertech 20w-50 + 4 quarts QS Euro 5w40 + 1 qt ETO2197)
In: 5.5 quarts blend (3 quarts Supertech 20w-50 + 2 quarts Traveller SAE 40 + 4 quarts QS Euro 5w40 + 1 qt ETO2197)
Off: XG3593A
Estimated hours on filter: 62 + 98 = 160
Miles on filter: 2,602 + 4,115 = 6,717
On: XG7317
Decided to change when the blot test was showing overall blot darkening, plus an inner halo. I am tending to just change the oil when it gets this way and is clearly dark from a dipstick wipe as it seems to be a simplest approach...
Very slightly lower consumption this OCI. Did an alcohol flush before draining--poured in 12oz when the engine was already warmed, turned it on and ran for 30 seconds, turned it off, and drained.