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Old 01-11-2022, 06:37 AM   #29
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Mine used a quart prior to the first oil change @ 5,500ish miles. After that it settled down and consumption has been nil. I vaguely recall seeing a statement in the owners manual that some usage up to 3,000 miles is normal (or maybe it was 5,000). However I am too lazy to comb through the manual looking for the statement to verify.

To the OP, I think what you are seeing is normal. Expect it to settle down as break in finishes.
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Old 01-11-2022, 10:47 PM   #30
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Ford Differential fluid says original good for 100K, and same for replacement if additive (specified) is used, but only x-miles if additive not used.

Have also read (somewhere?) that synthetic motor oil should not be used UNTIL after first oil change or rings will never seat properly?
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Old 01-12-2022, 09:44 AM   #31
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Originally Posted by Shadow5501 View Post
Mine used a quart prior to the first oil change @ 5,500ish miles. After that it settled down and consumption has been nil. I vaguely recall seeing a statement in the owners manual that some usage up to 3,000 miles is normal (or maybe it was 5,000). However I am too lazy to comb through the manual looking for the statement to verify.

To the OP, I think what you are seeing is normal. Expect it to settle down as break in finishes.
Correct. Page 116 in the 2021 owners manual states: "Note: The oil consumption of new engines reaches its normal level after approximately 3,000 mi (5,000 km). "
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Old 01-15-2022, 09:46 AM   #32
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I had Blackstone run a used oil analysis on my second change on the new 7.3. Results posted in a new thread here. https://www.irv2.com/forums/f23/7-3-...ts-567284.html. This may help folks decide what to use as a oil change interval.
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Old 01-18-2022, 10:33 PM   #33
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Yikes! Why is it using any?
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We have over 7000 miles on our 7.3 and it has not used any oil.

Bob
IDK did it from new. Recently was towing heavy across the country. Did catch some what I thought was a little gray tailpipe smoke idling at one of the roadside rests but thought no, Thats not possible. My 7.3 now has 15K miles. Changed the oil and filter right before left the East Coast and it was 2800 miles home and it was over a quart low again.
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Old 01-26-2022, 03:56 PM   #34
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Oil life

For what it’s worth, we don’t tow behind our ‘21 BayStar so I’m sticking with the 10K interval. I’m also sticking with the factory spec MotorCraft semi-synthetic oil as long as the chassis is under warranty. It’s a conservative approach with so many great full synthetics out there. But, should a major engine warranty problem arise, I don’t want the oil in the crankcase to be a target for Ford to shoot at. 😊

I am a big believer in running vehicles until they die , oil changes and the old adage “an engine burns fuel, but it runs on oil.” That said, I recall some years ago reading a Consumer Reports article on factory oil change intervals for conventional oils (then around 3,000 to 5,000 miles). They analyzed oil from taxi cabs with 3,000 mile factory spec intervals and concluded that even running those cabs for 7,000 miles in harsh operating conditions, even conventional oil still retained sufficient lubrication and heat dispersion properties. Since reading that, and especially with the advent of full synthetic oil, I started changing oil at 150% of the factory spec (unless the vehicle was under warranty) and have never had a problem. Frankly, full synthetic oils are so good, I bet I could go to 200% in my car and not notice any change. Just one old fart’s opinion.
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Old 01-26-2022, 04:07 PM   #35
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For what it’s worth, we don’t tow behind our ‘21 BayStar so I’m sticking with the 10K interval. I’m also sticking with the factory spec MotorCraft semi-synthetic oil as long as the chassis is under warranty. It’s a conservative approach with so many great full synthetics out there. But, should a major engine warranty problem arise, I don’t want the oil in the crankcase to be a target for Ford to shoot at. 😊

I am a big believer in running vehicles until they die , oil changes and the old adage “an engine burns fuel, but it runs on oil.” That said, I recall some years ago reading a Consumer Reports article on factory oil change intervals for conventional oils (then around 3,000 to 5,000 miles). They analyzed oil from taxi cabs with 3,000 mile factory spec intervals and concluded that even running those cabs for 7,000 miles in harsh operating conditions, even conventional oil still retained sufficient lubrication and heat dispersion properties. Since reading that, and especially with the advent of full synthetic oil, I started changing oil at 150% of the factory spec (unless the vehicle was under warranty) and have never had a problem. Frankly, full synthetic oils are so good, I bet I could go to 200% in my car and not notice any change. Just one old fart’s opinion.
So you are going to go almost 15,000 miles between oil changes?
How many miles do you put on your Godzilla jr. per year?
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Old 02-01-2022, 09:45 AM   #36
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So you are going to go almost 15,000 miles between oil changes?
How many miles do you put on your Godzilla jr. per year?
Once it’s out of warranty, presuming normal driving conditions and full synthetic oil that still looks okay at 10K, I just might. 🙂 In answer to your second question, we’ve put 16K on our rig in the 10 months we’ve owned it.

I should add that that the first thing I did when we got our BayStar home was change the oil that had just the 2,400 delivery miles on it. I practice an old habit of changing the oil and filter on new vehicles at 1,000 miles just to get any engine break in metals or impurities out. It’s a holdover from a previous generation of engine technology, but one that makes dollars and cents to me.
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