I drive a 2010 Vitz and have until now have had it's service done by the Toyota service center. My problem is that the motor oil they used to add in my car was Petro Plus or some thing like that with the grade of 10W 30. My problem is that this time I decided that instead of using the Toyota service center i should use the Shell oil center when i went there I saw that shell does not have 10w 30 grade oil so they added 5w 30 grade oil as well as some transmission oil in my car (due to it being extremely low) the car has now started feeling heavy, should i get the engine oil and transmission oil changed. please note when i came home and checked the user manual online for the Vitz it also said that the grade should be 5W 30, so i'm now feeling a bit confused and concerned for my car and whether i should change it out. For those in Karachi the oil change was at the shell pump next to Askari 4 opposite Millennium mall.