Do extended ocis lead to a better wearing engine?

[starvin_sgt]

Hi Bobbers! So in working with my new old 3.8 buick regal I bought the car with awful old oil. Thin like water and black worse than a diesel with blow bye, eww. The filter rattled in my hand! I will soon cut it open to see what I find was left of the filter.

This is my third buick 3.8 and my second series 2.
I have never had a smoother idle or smoother running out of any of them.

Could it be that running extended oil drains has contributed to better wear-in of this engine? Honestly it feels like it was balanced and blueprinted compared to the other two. It now has delvac 1300 and mmo in it with very black oil after 400 miles so it will soon be getting changed to a second run of that blend. I will run that heavy mmo blend until the color shows me that my inital phase of cleaning it is done.

So I am just starting my clean up routine but am curious if any of you think that extended oil drains where the oil is still viable leads to a better wearing engine? Or is this just a tough old well built 3.8 that had better assembly or by chance components than my other 2?

 

[Dakota1820]

sounds like it wasn't cared for are you sure it even running?

maybe newer motor mounts? or your butt Dino has short term memory loss and doesn't really remember the two you had before?

 

[fdcg27]

It could be that running long drain intervals within the limits of the oil used did nothing to hurt this engine.
There is some evidence that really short OCIs may be detrimental.
It appears that you have a good running 3.8 in this car and that's all that matters.
Good luck with your old Buick.
A good example of old GM's having built better cars than they're given credit for.
You'll likely see many happy miles from this beast.

 

[Garak]

Originally Posted By: fdcg27
A good example of old GM's having built better cars than they're given credit for.


This. Those engines could take a kicking.

 

[LeakySeals]

Originally Posted By: fdcg27

There is some evidence that really short OCIs may be detrimental.

Can you explain that some more?

 

[boosted]

^ That's just a myth, as long as you prime your oil filter before installing it you have no dry start up's and therefore no harm done, people also seem to forget that you aren't getting all the oil out everytime you change it, the oil pump is always "primed" unless you are using an attachment that screws on the oil filter stud/ housing that sucks the remaining oil out.

 

[yonyon]

Originally Posted By: Garak
Originally Posted By: fdcg27
A good example of old GM's having built better cars than they're given credit for.


This. Those engines could take a kicking.

Like Toadwart. "Dukie going to be mad at me, but Toadie take a kicking and keep on licking."

 

[dxbMercury]

Originally Posted By: boosted
^ That's just a myth, as long as you prime your oil filter before installing it you have no dry start up's and therefore no harm done, people also seem to forget that you aren't getting all the oil out everytime you change it, the oil pump is always "primed" unless you are using an attachment that screws on the oil filter stud/ housing that sucks the remaining oil out.


There is more to the story which isn't in the public domain yet.
Audi, from memory, are investigating whether the fumes or something in new oil can have a detrimental affect to their engines. No other details yet and of course is very vague and unsubstantiated.
That story I suspect is the origin of the comment about regular oil changes.

 

[weebl]

Or best bet would be to either follow manufacturer recommendations, or base an extended OCI on UOAs.

 

[starvin_sgt]

The Regal does use different motor mounts, since I have never ridden in another one you may be right. But boy is it different like lincoln 4.6 smooth vs any 3.8 I have ever been in.

 

[starvin_sgt]

Just changed out my first clean out oil change and it came out really black again. Do you think I could have a sludge problem? The filler hole shows varnish but I can't see deeper than that. Would black oil going forward mean that I have sludge? The 3.8 is not a sludge motor but any motor treated badly will right? If anyone can tell me how to upload pics I will ruin your dinner with some.

 

[dave1251]

Originally Posted By: boosted
^ That's just a myth, as long as you prime your oil filter before installing it you have no dry start up's and therefore no harm done, people also seem to forget that you aren't getting all the oil out everytime you change it, the oil pump is always "primed" unless you are using an attachment that screws on the oil filter stud/ housing that sucks the remaining oil out.


You did not read my recommend studies did you. It is not a myth but in the grand scheme of engine life and life in general I would not worry about it.