Did you do anything different other than the usually routine? how many miles since last oil change? What weight CAT oil? and what weight did you use before? Anything else diff other than the rough idle? does it start like usual?
2002 F-250 handshaker Daily Driver To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
a couple of years ago i was due for an oil change and all i could get at the time was valvoline premium blue and my truck would idle rough. took two oil changes (10,000) mi before it straightened up. i only use rotella or mobil now. if i cant get those two i wait until i can.190,000 mi and still uses no oil.