Troywright68 Posted May 4, 2018 Share Posted May 4, 2018 Hi everyone. I have a 2002 Mack RD688S with E 7, 350 HP with 621,0047 miles on it. Yesterday when I checked the oil I noticed it appeared to have diesel in the oil. The truck doesn't miss or smoke. So what could be causing this? Quote Link to comment Share on other sites More sharing options...
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.