Mern
Come at me bro.
Alright so tonight I was with my friends and we decided to check my cars oil, I was dangerously low so we threw in what we had which was a 5w-20 synthetic. Winter is coming and I'd like to run some 5w-30 can I just dump that 5w-30 in on top of the 5w-20? Google wouldn't give me a straight answer so I figured you guys might have some insight. Thanks in advance.