Use an extra qt of oil...

[HoosierDaddy]

Going back to the days of 1970's & 80's cars that were abused and therefore packed full of sludge.
Never tried this, but it's what was going around the shop at the time.

Do an oil & filter change and substitute a qt of tranny fluid for one of the oils.
Next OC, and for several after that, still doing the substitute, flush the engine as OP described with an extra qt or two to help get all the crap that was getting softened up out of there.

The thought was tranny fluid had a ton of detergents in it and would start to break the sludge up.
I always wondered if having a ton of that crap working its way through the motor was a good idea or not.

I remember seeing a valve cover removed and it was about 95% packed full of sludge, more like dirt. The rockers had clearanced the mud from their movements.
Freaking amazing.

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[VoltageDrop]

Extra quart, you say?
https://www.bronco6g.com/forum/threads/dealer-insists-it’s-6-quarts-for-oil-change-on-my-2-7l.49883/

 

[Area51BS]

Follow intervals, change per manual. Don’t over analyze this and sleep good.

Actually cut intervals in half. Manufacturers are using long intervals to gain carbon credits. Less oil to maintain looks good to the epa.
Modem rings exhibit little outward pressure for less friction. Well that causes issues too. They don’t care or want a vehicle to last 100’s of thousands of miles. Funny, one would think the epa would want that.
I do agree with you in change oil, don’t over analyze and sleep good.

 

[Nc211]

In all seriousness, yes I do this, and have for the last 20 years on 10 cars with 0% engine problems.

One poster mentioned karosene in the crank case of an old truck. You laugh, but that is a farmer’s trick to keep those tractors working for decades. It absolutely works to keep varnish at bay.

About every 15,000 miles or so, I will pour in about a cup of Seafoam into the oil and let the engine idle for about 20 minutes. I then get it ready for the oil change and let it sit overnight (cool down and drain down). I will use an extra quart to flush out the pan in that scenario as well.

If you think it’s bogus, then try this to find out. Change your oil, then immediately do the seafoam routine, and then change it again. I remember doing that on my 95 Lexus LS400 when I first heard about this. After 20 minutes, the new oil was black as midnight. That car purred until I sold it at 150k miles (to the master tech at the Lexus dealership) in 2007.

 

[KC2LLW]

Does any one drain their oil THEN pour fresh quart in to "flush out" anything that didn't drain.

I do that to all my vehicles about a 1/2 of a quart but my friend owns a oil company and I buy the pennzoil ultra platinum and Shell Rotella T in drums from him

 

[PWillette]

Back in the 60's & 70's it was pretty common to run an extra quart through, my dad swore by it. Of course oil was cheap back then. Running a kerosene flush was also very common, at least in my in my neck of the world. Sludge build up back in them days was real...not so much today.

 

[BlueWaffle]

I'm not a poor so I usually just drop in a new crate motor every 5k.

 

[brkdncr]

Sludge in your pan isn’t bad. It’s better than it being anywhere else. If it’s stuck to your pan it’s not getting past your filter.

 

[SeptuagenerianSasquatch]

I put as much water as possible in with the drain plug in then start it to make sure I get the oil to separate out then drain again

What detergent do you recommend?

 

[DefNotBuddyLee]

Dawn is specially formulated to help remove oily residue.

I put the dawn on baby ducks, birds, or other furry rodents then send them through the engine. The scrubbing action plus the agitation of the fur/feathers keeps my engine squeeky clean. In the event you don't have access to Dawn, use Scrubbing Bubbles

 

[wgw]

Does any one drain their oil THEN pour fresh quart in to "flush out" anything that didn't drain.

If you’re concerned about oil quality after a change I would suggest you run it for a short time, pull a sample and send it out for testing. You will get back real data, that covers about everything you wud want to know, actually you should base ur change (just my opinion) on the same data. Pretty much anything else is a guess.

 

[wgw]

What detergent do you recommend?

Dawn if its good for ducks ya cant go wrong

 

[timhood]

You guys are all treating the problem rather than avoiding it altogether. I installed an oil reserve tank. It holds 5 gallons of fresh oil and constantly feeds the engine with new oil. The old stuff goes right into a collection tank before it ever gets gunked up. (Though some people who've installed this just run a drain hose right to the street--I do not recommend this for environmental reasons.) I drop off the "used" oil at the auto parts store at the same time I buy another 5 gallons. Never had one engine failure!

 

[Umichigan1]

Does any one drain their oil THEN pour fresh quart in to "flush out" anything that didn't drain.

Unfortunately a topic like this will gather a ton of opinions, some more valuable than others. FWIW, I swapped my drain plug for a magnetic one. And I run full synthetic (as opposed to OEM blended) but maintain the change schedule as if it were OEM quality oil. I figure the magnetic plug will deal with some of the debris of engine wear. Also, my change schedule is a bit more conservative than OEM recommendations. So I think (only my opinion) I'm playing it safe without going overboard. I'm not a mechanic but I am an engineer so I just try to take a common sense approach. Again, FWIW.

 

[BluebroncoNC]

I use beer, one or two pints depending on how long I want the drip to drip before plugging it up. Oh, did you mean the truck?

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