Wife's 03 Subaru has 233k and while me engine wear levels are fine (Blackstone testing 1x/year) I am noticing oil consumption, not leaking. One change I had to hadd .5 qt, another 1.5 qts. I run 5w30 full synthetic. Been thinking of 10w-30, my mechanic buddy said he switched to 25w-50 for his old honda CRX that sucked up oil. seems a bit drastic, but he knows more about cars than I. I know it's an old timer thought to use heavier weight oil to get better sealing, but does that compromise anything else? The tech at Blackstone even said it may quiet lifter noise and be overall smoother.
I also have noticed vibration lately, but don't think that's correlated to the oil levels.
I also have noticed vibration lately, but don't think that's correlated to the oil levels.