AF: Oil additive or not? | Allpar Forums
Dec 19, 2019· And, it is not a noise noise; more like quite "grinding" coming from the left, passenger side of the engine. I was hoping for one of the pulleys or tensioner but it is not. Next step changing oil and oil filter. Like I stated before, previous owner said that he stat using synthetic oil two years ago, so I will have to continue with synthetic.