Salam Seniors
So i own A Suzuki Jimny JA11 660 Turbo and it used to reduce oil due to weak rings therefore started using 20W50 oil although its recommended to use 10W30 in it.Now i changed its Rings but the mechanic again put 20W50 in it.So i had a few Queries
1-Can a small turbo engine like this handle a thick oil like 20W50,Wont it effect its Mileage or the turbo?
2-Considering i just had its Rings replaced,Can i shift back to 10W40 or 10W30 although i have been driving on 20W50 for the past 2500km,If the engines seals and rings are replaced then it wont burn oil upon the shift right?
3-Why do mechanics love 20W50 in Pakistan,any specific reason?