ok so what i am getting is stay away from 20w50 and stay witha 30w or a 10w 30 ,, what do you guys think about Synthetic oil ,, here in our shop were i work we use 15w40 full synthetic real green , i would love to use this oil i could change every 2k or less ,, but i have read to stay away from them ,, thanks for the info i will get me a heat gauge do some real test , i am going to take the rad out and get it look at by another shop and see what they say ,, i would like to look into making some kind of fan shroud that would help pull more air across the rad away thanks again


1958 chevy biscayne
235 6 cyl 1 barrel
2 speed PG tranny