15 to 18mpg
I have 1 and I'am getting 14 to 15 mpg In city, trying to find ways of improving the mileage of it
Depending on the differential gear ratio, anywhere from 17 to 19 mpg.
5w30
R134a
being a 454 it doesn'y get any kind of fuel mileage
4L60-E
Obd ii
4L60E.
rocket fuel
If the Blazer is gasoline powered the antifreeze can be any kind that is for sale for gasoline powered vehicles.
You should have this verified but the freon is probably HFC134.
It will be a 305 or a 350 fuel enjection engine ( TBI )