Originally Posted By: Anies
To me, it looks like the conventional was cleaning the engine. Now the important thing to ask here is:
1- What brand conventional did you use before filling with your current synthetic? (Valvoline)
2- How long did you use the brand(conventional) for(1-2 oil changes)? (Every?)
3- Do you just use any dino oil that is on sale so no back to back fills of the same brand?
4- What are your OCIs?(5k OCIs)
5- Are you the original owner?
Sorry for the questions
I do believe its cleaning the engine out and or has been keeping it clean. Filled in some of the answers as i re-read everything
more questions the better! i am the original owner, my wife drives it like an old lady, but the few times that i drive it i drive it like i stole it. the oil gets changed when the olm goes to 0% so around 5,000ish miles. it has always been brought to valvoline and has always had valvoline dino oil. the main reason i switched to syn oil is because it is starting to get the infamous gm piston slap however it runs smooth as silk when warmed up, the oil fill cap did have some of that creamy coffee colored residue on it.
To me, it looks like the conventional was cleaning the engine. Now the important thing to ask here is:
1- What brand conventional did you use before filling with your current synthetic? (Valvoline)
2- How long did you use the brand(conventional) for(1-2 oil changes)? (Every?)
3- Do you just use any dino oil that is on sale so no back to back fills of the same brand?
4- What are your OCIs?(5k OCIs)
5- Are you the original owner?
Sorry for the questions
more questions the better! i am the original owner, my wife drives it like an old lady, but the few times that i drive it i drive it like i stole it. the oil gets changed when the olm goes to 0% so around 5,000ish miles. it has always been brought to valvoline and has always had valvoline dino oil. the main reason i switched to syn oil is because it is starting to get the infamous gm piston slap however it runs smooth as silk when warmed up, the oil fill cap did have some of that creamy coffee colored residue on it.