Hi, I have 68 dart where i am new owning this car. I need to do an oil change and had purchased 5w-20. This will be my first time to do this. I want to know if this is the correct viscosity? Sorry for my ignorance. I read a good article link https://motoringcrunch.com/reviews/0w20vs5w20/ for 5w-20 and seems to be good for this car.