should i use 5w-30 or 10w-30 for my 1992 cadillac brougham 5.7l v8 350?

Oct 22, 2008
35
0
6
i just bought this car 3 days ago and the previous owner used pennzoil 5w-30 but i was thinking go with mobile clean 5000 10w-30 cause its a old car and mobil is better but i live in chicago and the temps are in the high 20s now cause its winter so what do u guys think? i looked inside the valve covers and i still can see metal parts inside with a tiny bit of baked on oil the car supposly has a rebuilt engine in it with 20,500 miles.
 
Back
Top