Every once on a while, not always, turning the wheel all the way to park or back out of a parking space I hear and I think feel that pop sound. Wonder what that could be?? Also, I check my oil level and color constantly. This week from Tuesday till today I’ve driven over 600 miles all highway. I use non ethanol exclusively and I have about 3000 miles on this oil (sino). I notice I turns from that light honey color to a darker color but never black pretty quickly like already. Could this be because I run non ethanol gas? Ethanol being a good cleaning agent. Am I carboning up my oil sooner? Hmmm.