R12 oil is a mineral oil base I believe and 134 is a synthetic.

So you have to drain and flush the entire system of the old oil before changing over .


85' 4x4 e-cab flatbed 22r carb ((SOLD))
86' 4runner, 22re , "60 buck truck"
95' 4runner, 22re,5sd, last of the good ones
02' Tacoma prerunner, 2.7L, 5spd., 4x4