any oil/gas treatments i can do and oil change for 93 mazda?

T CUSE 2

New member
i got a 93 mazda mx6 it has 171,000 miles on it and i love the car so i want it to last. i got an oil change and i've been using quaker state regular 10w 30 and i want to know what is the best kind of oil to use on a car and what kind and name brand.

also can i do like a slick 50 treatment or gas treatment? i want to get as much gas mileage and i want to clean my engine of all the gunk or whatever.

so whats the best oil to use and what treatment to make my car run longer and cleaner
 
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