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This dirty oil stuck in your pan, forever. Let's fix it.

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7.3K views 35 replies 23 participants last post by  64Vette  
#1 ·
 
#2 ·
This is where the marketing is real good! The trapped oil is not a problem, if you change your oil on schedule. You are diluting that oil with every oil add. They kind of make it sound like a quart of oil from the factory is still in your engine! This trapped oil is not a problem, the same thing happens in your transmission with a pan drain, you still have the fluid in the torque converter, and the service intervals are engineered to take this into consideration. Somewhere on the forum is a thread by a guy who wrote the fluid spec on the transmission while he worked for Allison. He addressed this topic and how he calculated the fluid dilution.
He was an incredible asset here, coming to help us after retirement and his confidentiality contract was up. Unfortunately he was run off by trolls who “knew more than him”.

that being said, the fin design is superior to my PPE pan, I run cooler with increased capacity, I am sure the fins would improve that. And it looks cool!
 
#22 ·
This is where the marketing is real good! The trapped oil is not a problem, if you change your oil on schedule. You are diluting that oil with every oil add. They kind of make it sound like a quart of oil from the factory is still in your engine! This trapped oil is not a problem, the same thing happens in your transmission with a pan drain, you still have the fluid in the torque converter, and the service intervals are engineered to take this into consideration. Somewhere on the forum is a thread by a guy who wrote the fluid spec on the transmission while he worked for Allison. He addressed this topic and how he calculated the fluid dilution.
He was an incredible asset here, coming to help us after retirement and his confidentiality contract was up. Unfortunately he was run off by trolls who “knew more than him”.

that being said, the fin design is superior to my PPE pan, I run cooler with increased capacity, I am sure the fins would improve that. And it looks cool!
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Clean and cool oil will always be the key to success to longevity, will more capacity do either probably not. Is it a good idea to get rid of as much of the old oil as possible, of course, but adding extra capacity that does nothing is just adding cost. IMHO the best solution is to clean the oil better while running using a bypass oil filter setup like the one from Frantz. This will add some capacity and keep the oil clean and could allow longer change intervals, offsetting the higher cost for the oil.

 
#9 ·
That is a really good point about the oil pickup That also likely explains why GM designed the pan that way.
 
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#10 ·
Interesting video, but I can think of much better things to spend $500 bucks on.

The Duramax has proven time and time again it's incredibly easy on oil. If the excess leftover oil was truly an issue we'd know about it after 24 years...

I'm sure it cools better than the stock or PPE pan, but I have yet to see my oil temps on my L5P anywhere near a level I'd want supplemental cooling or capacity.

In other news. If these are the types of products being developed for the Duramax, it's a great testament to how great the stock configuration is. Almost all the aftermarket products don't really solve 'problems' that universally exist.
 
#12 ·
Interesting video, but I can think of much better things to spend $500 bucks on.

The Duramax has proven time and time again it's incredibly easy on oil. If the excess leftover oil was truly an issue we'd know about it after 24 years...

I'm sure it cools better than the stock or PPE pan, but I have yet to see my oil temps on my L5P anywhere near a level I'd want supplemental cooling or capacity.

In other news. If these are the types of products being developed for the Duramax, it's a great testament to how great the stock configuration is. Almost all the aftermarket products don't really solve 'problems' that universally exist.
I would agree, and only recommend for appearance. Some are not into that, and it would be a waste. As for cooling, if I need that I would do the upgrade to the new style cooler, the one on my 2020 is larger than the 2018, and I think the newer ones are bigger yet.
I liked the added capacity, although, I admit to being a fluid change freak anyway, so it’s probably a moot point for me.
My neighbor joked he wanted to buy my old oil so he could do an oil change on his.
 
#13 ·
Yeah, if the quart of oil left in there was so horrible for your engine, explain how these things last over a million miles. Also agree with @Piper One , draining the pickup tube and having no oil flow for the first few seconds, every time you start your truck, cannot be a good thing. Actually, probably waaaaay worse than some old oil left over in the pan.
 
#14 ·
Yeah the flaw with this concept is that it completely disregards physics. Sure, some oil doesn't flow out when the factory drain plug is pulled. If the flow rate through the pickup tube was slow enough, and the engine was stationary, and there was never any thermal cycling - is it possible that stale oil could accumulate? Sure.. I've seen it in large water cooled centrifugal chillers. The oil at the bottom of the oil tank captures all the fines and crud from the system, some manufacturers have figured out that you need to put the drain plug on the bottom of a vee-pan to get it all out. I have a hard time believing that on an engine that's cruising down the road, taking turns at speed, is starting/stopping and running from zero to over 3k RPM, that there isn't enough turbulence and thermal cycling to mix the oil in the bottom of the pan.

Does the pan look cool? Yeah. Does it facilitate changing oil and not getting messy? Yeah. Do the fins help the oil run cooler? Probably not (no where near enough of them, and not in a location with sufficient airflow)
 
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#21 ·
I for one would recommend putting an oil pan on like that. For the thought that it might keep the pickup tube full the way they are designed from factory is bogus as the tube comes down right on top of the hump and is away from bottom of pan by good measure. Will it make that much difference in the long run? Probably not that much but i like the thought of draining all the old oil out and why keep it from draining all the oil out to start with. The Banana pan is another option.
 
#25 ·
And your truck will be just fine, they design it for pretty rough service. Some people like the look of the aftermarket pans, and do it for that reason alone. To each their own desires! That’s what makes the truck culture so cool, everyone puts a slightly different flair to their trucks. I bought the PPE brand, like the look, was worth it to me. It will however, not make you go faster, to this I was disappointed, I was expecting much faster acceleration.
 
#28 ·
Just a thought... I have an LM2 3.0 Duramax and the dealer has always changed the engine oil. I am the jerk that stands in the doorway and watches the work being done, but I always give a good tip to the tech. All but one oil change the tech pulled the drain plug and then the oil filter to allow both to drain at the same time. It always took 7 quarts to get to full mark. One tech drained oil, installed plug then changed the filter. When I checked the oil level at home, it was 1/2 quart overfilled. Had to use my oil sample pump to remove excess oil. To me, that means the oil filter removal breaks the suction on the pick up tube allowing the oil to drain from the tube. That also would mean the oil pick up tube has to refill at each oil change start up. (Just to aggravate some people on this thread a little), maybe we should be prefilling the filters if you really want to cut down the oil pressure build up time. Just my 2 cents.
 
#29 ·
... To me, that means the oil filter removal breaks the suction on the pick up tube allowing the oil to drain from the tube.
Between the oil filter and the pick up tube is a positive displacement oil pump. If spinning off the filter lets the pickup tube drain.....you have massive oil pump problems as it should not allow any appreciable air to bleed back through.
 
#34 ·
I read this thread a while back and a thought came to mind today.

Rather than change out the oil pan and concerned about not getting all the oil out how about a small tube with a curved end on it then a hand pump to get that extra oil out. It seems if a about 1 quart is left then maybe this could get about 1/2 to 3/4 of the oil out. I haven't tried it so it is just a theory. This would be only $5 to $10.
 
#36 ·
Good discussion. My uninstalled PPE aluminum pan is going to make a nice sturdy drain pan.
 
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