No Diesel oil

P

Proartguy

Member
I read a couple of posts about using diesel oil because it has more anti-wear additives. I changed oil and used diesel and 50 miles later it had a knock which turned out to be a rod bearing.

Yes, diesel oil has more wear additives, but it also has more detergent for the soot byproducts. Subsequently I saw a couple of articles about this since my mistake.

https://bangshift.com/bangshift1320...-what-you-shouldnt-be-running-in-your-engine/
 
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I have used Shell Rotella 15-40 for many years with zero issues. Any of my engines I have taken apart with many miles on still look new. What condition and miles were on your engine prior to changing oil? I believe there may be more to this story.
 
I've always wondered why some people insist on using a product recommended for uses it was not designed for.

Perhaps the panache of diesels, you know, those broad-shouldered semi-trucks pulling incredible loads through the Rockies, driven by brawny, ruggedly handsome teamsters?:D
 
> > broad-shouldered semi-trucks pulling incredible loads through the Rockies, driven by brawny, ruggedly handsome teamsters?> >


Yep. Like Ms Willem & her 389. Brawny, Rugged, A PeterBilt driver for sure.



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Not certain how many miles are on the engine. I was told it was rebuilt before I bought it and certainly appeared pretty fresh when we took it apart.

I included a link to an informative video about the reasons why it is not a good idea to use diesel in gasoline engines so it would not be just my opinion. I realized there would be those who could recount how good it works for them and refute this. Not my facts - watch the video.
 
The video was talking about fuel injected engines. I've run Case-IH 15w-40 diesel oil in my flathead Merc for the past ten years with no worries. For no other reason than I had that oil on hand at the time. I've since used 10w-30 diesel oil in several IH sixes and a GM V8. All carbureted old engines and working just fine. No worries about zinc just trying to have more engines running the same oil to simplify things.
 
> >I changed oil and used diesel and 50 miles later it had a knock which turned out to be a rod bearing.> >


After only 50 miles, much more likely a coincidence than oil change being the cause. If it was mine, I'd search for more likely causes.
 
I too have been using diesel oil in all my cars and farm equipment, that includes T, A and V8's with no problems.
 
Shell Rotella 15-40 is good engine oil. It would not have caused an issue alone.



One thing you never want to ask a truck driver..... how's your Peterbilt?
 
I too use diesel oil. Chevron Delo, Shell Rotella or Napa house brand. Seems one of those is on sale at our Napa store here on any given week. I don't think a connecting rod knows if it's in a gas or diesel engine and at 21:1 CR and corresponding torque after firing, the film of oil on the rod bearing and wrist pin has to hold up to the task. I'm sure that diesel oil is more than capable of lubricating our V8s.
 
The reason that diesel oil isn't good for gasoline engines is because of the different additive packages. Essentially, the soot dispersants required in diesel oil react negatively with some of the additives required by gas engines and render them ineffective. Here's a video I found on a Corvette site that explains why in detail. If anyone can watch it and fully comprehend it, they will switch back from diesel oil tomorrow. https://www.youtube.com/watch?v=HcJHJL5Ys-Y&t=9s.
 
Biodiesel Fuel

As mentioned before - diesel oil probably was
not the cause - however - for older diesel
engines biodiesel fuel should be
avoided - the higher the content the less
lubricants reach critical wear parts and
the increased cleaning action strips what
little film is left - causing metal on metal
friction and catastrophic failure.


Jim
 
If one of us guys would ask Ms. Willem how she likes her Peter Built,
I THINK HER ANSWER WOULD BE x RATED. :D:D:D





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