i gave my brother my audi q7 for a weekend n i told him to get oil change, and instead of sintatic oil y put regular oil and now is making funy noises i would like to know what i should do, thank you
i let my lil bro borrow my car for a weekend, n i told him the car needed oil change and instead of sintatic oil he ended putting regular oil, and now the car is making funy noises, i would like to know what i hould do?