Hey guys, so i have the City IDSI (auto) 2007 model, swapped engine to a kabuli one, so ive been using many different engine oils over the past few years which include Honda, PSO, Shell, Zic and now Total Quartz 4000, i want to change to Liqui Moly and the viscosity im using is the regular 20W/50 as per all the mechanics recommend, should i move to Liqui Moly and also should i carry on the same grade for oil or not ?