Hello, I have an 85 f-150 with the 300 I6. It has around 40,000mi since a rebuild. My question is; I notice a little oil smoke{blue} when holding back a load on a steep hill/grade. This has happened only 2 times although I use this truck almost every day. No smoke at start, runs great, pulls great, no smoke any other times. Any one have a suggestion on some thing I mite try? thanks every one, Mike

 

I suggest pulling your plugs and see if any of them have oil on them... if so bad valve seals, it gets worse I know.. still smokin to this day.. goodluck