Synthetic also lasts longer roughly 7,500 miles just keep using 20w/50 no need to use synthetic.
are you? 5w3020w50? Wtf are you retarded? Do NOT run that thick of oil. 10W30 and synthetic will work fine, free is even better.
exactly and this guy lives in canada......so to nacivicsi, no i dont fail muchsynthetic is ok to use whenever. just keep it constant. dont go switching back and forth at each change. 5w/10w depending on where you live
Synthetic wont hurt, and since it's free, hell yeah go for it...