2021 F-150 Lariat 10 speed tranny w/17500 miles on the odometer went through a qt of oil noticed at oil change. No leaks. The next oil change it was down so low it didn’t register on the dip stick. Made appt w/Ford dealer. I was told the process was I bring the truck in, they check the dip stick and send me on my way. After a thousand miles, bring it back in. Do this for the next 4 thousand miles, visiting every thousand, for a total of 5 visits. (That could take half a year.) I don’t know it they just keep track of how much oil is left or add to it each visit. Anyone know what they are trying to learn?

When reading previous year forums, they say a 2018-2020 5.0 burning. Qt every 3K miles is acceptable. (But that is probably a slightly different 5.0L.) I question that because if I were to go the distance the truck tells me before an oil change (about 6K miles) I could be down 2 qts or more and register nothing on the dip stick. The Valvoline sticker suggests only 3K miles between changes, which would/should show something on the dip stick and not cause as much of a concern, causing me not to have it checked out by the dealer. What’s the “bring it back after a thousand miles for a total of 5 thousand miles” all about?.

 

If you won't comply with Ford's requirements they won't comply with replacing your faulty motor. No one changes oil at 3k miles any more.

 

You don't say your engine, so thank you for having it in your profile. 2021 V8.

Only way to know if you use any oil is to check level after an oil change then you know where you are at the start. The dealer is following a protocol to determine if there is an issue.

Using a quart every six thousand miles is not an indicator of a problem. i'm pleased that you look. Too few people bother to check vital fluids like oil level.

 

They say its ok, but using a quart every 3000 miles to me is very excessive.

I change oil every 5000 miles and the amount of oil my engine uses is imperceivable.

 

I agree that a high volume production engine for a daily driver/work vehicle shouldn't burn much, if any oil between changes. 1qt/3,000 miles doesn't sound bad to me though, because I'm conditioned to think 1 liter/1,200 - 1,500 miles is normal on my high performance BMW V8's. :-) my 2000 M5 uses 1 liter per 1,200 miles due to the piston oil control ring design. I've put over 200,000 miles on that engine, now sitting at 334,000 miles total, and the consumption only changes during times of small oil leaks or vacuum/air leaks. At least on that engine, air/vac leaks lead to higher consumption. Once diagnosed and repaired, the consumption returns to "normal". In hindsight, I should have invested in a 55 gallon drum of oil for that car! Even my 2013 twin turbo V8 M5 uses about 1 - 1.25 quarts per 5,000 mile oil change interval. More if I take it to the track. I hope my new F150 (5.0L) will finally relieve me of having to add top up oil!

 

I really need to check mine. I have never checked it....ever. It has had one oil change at Ford about 5 months ago.

 

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There is a lot your just now catching up with.
These engine have hard spray-in cylinder liners in place of steel sleeves in the Alum blocks.
The ring set takes a long time to break-in.
The dealer cannot really fix the issue but do a TSB that does not fix a ring seal issue but may slightly reduce oil passage.
Don't look for engine replacement or very soon because there are none to be had very quickly..
The issue is Ring Seal.
Blow-by during combustion adds excess crank case pressure the PCV feeds back oil mist to the throttle body and right back through the combustion process.
On the intake stroke, oil is pulled that has passed the rings into combustion due to the high vacuum on the intake stoke..
This is two separate paths that end up in the cylinders and out the exhaust.
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I have been through this with a 2018 as a very long break-in interval and now have little to no oil passage any longer at 72k miles.
No TSB or dealer intervention whatever because what they are told to do will not fix it.
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BTW, many other makes are using spray-in lining to cylinders and have the same issue. This is often not known unless one does investigations on other forums and see the complaints and finding out they are using the same cylinder lining process.
Not what you wanted to hear but it is what it is.
Good luck Bill, I looked up your call.

 

In short... if you are really thinking a problem.. do yourself a favor and get an extended warranty. In the end.. it did help me get my '17 f150 leaking problems knocked out. you get high deductible and have a backup plan....

I have had three E350's with the same (5.0) cylinder construction. They all used oil after 60k. I don't know if it is due to thinner than thin rings, low tension or just getting hot and loss of tension. And I changed the oil on all three motors like a maniac. My wife's current E has cast spun liners.. I did not take any chances... I know that is not a 5.0 but I have my doubts on the bores (aluminum block vs iron cylinder stability) and thin rings.

Once you start to get blow by on the top ring.. it is going to carbonize oil on the lower rings and there you go. A smoker...

And yes I have the 2.7 because I insist on iron.. old fashioned.. I trust an iron block and iron cylinders.

good luck.

 

I'd be ecstatic at a quart to 3000 miles. I've fed my truck a quart every 1200 miles for a decade.

When FOMOCO tested mine, in 2013, they told me that a quart to 1200 was within their specs, and they wouldn't work on it unless it went to a quart in under 1000.

I have a 2011 F150, 5.0 XLT, w/ 202,000 miles on it now BTW.

 

I heard 3rd gen cylinder walls are plasma coating, but they went back to iron sleeve in 4th gen coyote, is that true?