I wonder if lifter failures with high idle time might have something to do with the variable oil pump? Perhaps there is inadequate lubrication? Maybe it has nothing to do with the oil being used at all.

 

Anyone who claims a syn oil offers less protection than a semi syn oil is challenged to post a detailed analysis. Otherwise your just making stuff up as you type.

 

This is very disconcerting, Mobil 1 is bad, *political content deleted* and chupacabras do exist!😵‍💫

 

It must all be a gimmick.

 

^this is my guess

 

That would be my guess as well, I think the 6.4 hemi has a variable oil pump and pressure/lubrication issues at low load and idle speeds IIRC. That said the 7.3 lift issue seems to be fairly limited in number.

Without doubt, the API just making stuff up...



https://www.machinerylubrication.com...0groups%20were).

 

These 7.3L engines go into all manner of commercial vehicles. The gas engine is chosen in commercial applications partly for its ability to idle for long periods of time without issue. So if the variable oil pump was problematic, that’s a huge fail by Ford.

 

If the oil pump was starving the lifters for oil we'd see a lot more failures.

 

Agreed, the 7.3 lifter issues seems to be isolated to one off defects, doesn't seem to be platform wide.

 

Even with issues that are actual design problems, the issues might only manifest on a minority of samples. This is usually the case. I am on the fence about this one. Is it a design flaw, bad batches of components, or something else? I would bet that any modern oil is not the problem though, if it is changed out in a reasonable timeframe.

 

Now because of the Internet........ If we were in 1988 right now, none of use would have ever heard about a 7.3 issue. It's not like the Pontiac fiero that had a mis calibrated dip stick and was blowing engines left and right, causing fires. The dealerships around me aren't seeing any issues with the 7.3. Now transmission complaints are a many, but that's because people don't put in D and drive on.

we hear of a couple issues and immediately it's a global issue.

I have way bigger things to worry about than if "maybe" I'll have an issue ........

 

I just want the OP to tell us exactly what the issue is and how he confirmed it, else you never know what to believe.

 

no dog in this fight but the "dOnT iDlE yOuR TrUK" comment got me good lmao. Its my office....and it's literally 120 outside. what you think im gonna pop in to starbucks to work?

 

If you have a $12k CP4 failure you will have to work from Starbucks. Much more common problem than 7.3 failure.

 

If you run it at an elevated idle to keep cylinder temps up you can mitigate potential issues. The issues with long idle times in emissions diesels, really all of them with high pressure injection systems, is well known, it isn't just some internet myth. It can most certainly damage your engine. Gas engines, like the one in this discussion generally tolerate ridiculous amounts of idle time with no problem.