Guys, I still have some engine oil left from oil change during last 2 times of maintenance, I wonder if it is compatible to top up with my current engine oil that I'm using during last maintenance as both are different brands but I'm not sure about the grade though ? Will there be any effect ?

Car: Proton Wira Auto 10+ years

Would like to seek advise from you all here, currently driving a wira aeroback year 2003, recently i notice that the rear part of the car is lower than the front and there is a sound of tire scraping when making turns on a short incline, might this be the absorber starting to kaput ?

need recommendation for toyota avanta 2010 150k mileage , which viscosity , mineral , semi or fully is better ?


Thank you.