If you are unsure use Ester oil. It is safe for all systems and chemicals.
r134
R134a
R-134
About 15 mpg on a 1990 Chevrolet suburban.
r12
1990 Chevrolet suburban gets about 15 mpg.
The 1996 Suburban uses r134 Freon. The fittings to add Freon are different sizes on r12 and r134, making it impossible to add the wrong type to your vehicle.
11 oz
R-12 or "Freezone" (the R-12 equivalent).
SAE 10w30 any major brand.
64 ounces of 134A is the capacity of the 1996 2500 suburban dual air system......