CleanSump
Site Donor 2022
What's your overall impression of the QS? Been thinking of putting it in an X3 with N52.The Quaker State 5w40 euro is what I've been using lately in my BMW N20 and N55 engines.
Smoothness, lifter tick, general noise compared to say Castrol, free revving or does the 40 weight have a thickness penalty?
Yes, I'm asking for OP's perception of the change. No need for people to tell me any differences are in my head; the Buddha said common mortals only see our perception of the world, not the reality. Hence, all the scientific measurements one might have recorded are actually altered by our perception and no more valid than seat of the pants.
Thank you!