I put 30w in right after the rebuild and i am ready for a oil change, i though it might help because iam running a little hotter than normal thats all ,, am i understanding it right that 20w 50 starts off like 20 and as it get hot it goes to 50 ?
Thanks


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