Switching to 5w-20 from 5w-30 in older civic
 

i was in walmart and noticed they have castrol gtx in 5w-20 grade so decided
with this oil change in my old 1988 honda civic i'm using the newer grade.
hopefully it won't cause any damage. i don't think it will and i think it's
going to be an improvement. less strain on the crank shaft and pistons.
anyone who has any knowledge about the newer oil please let me know. thanks.


-jeff