I took it to walmart and they couldn't find it in there manual and it wasn't on the engine anywhere. One of the guys at the walmart auto center said he use to service company trucks with the same engine and it took 15-w40 . I used rotella brand are there any cheaper brands that are still good quality? It cost me about 59dollars to change 14 quarts of oil I though about using supertech because I've used it on all my cars . here are my specs
1994 F350 xlt turbo diesel dually 7.3 international engine manual with 72k miles can I use synthetic even after it's had regular oil in it for 72kmiles?
1994 F350 xlt turbo diesel dually 7.3 international engine manual with 72k miles can I use synthetic even after it's had regular oil in it for 72kmiles?