My truck has been making that noise for 2+ years and 60,000+ Kms. No issues at this point. I'm thinking rocker arms, but haven't had the time, energy, or money to look.
How's the rest of the cab r and r look? Is the ground strap busted to the firewall or under the passenger front door? Cage nuts are all spun I bet. Be neat to see the floor under the carpet.
I bought diesel for $4.02 a gallon in port Huron on Saturday. It's 1.339 a liter here.
Using a US gallon conversion, that's $5.07 a gallon Canadian. Even taking into consideration the exchange rate I still come out ahead.
I worked for a fleet garage fixing garbage trucks and we used that oil. Never had any issues with it. I ran it in my own truck when I worked there cause the price was right. A buddy of mine runs it in his big cat dump trucks never had any issues. 600+k with original bearings still.
I'm back to Rotella as we have it in bulk at my shop.