Check the oil level on your new Mustangs ASAP

[Ewags81]

who knows. I don't think Ford would intentionally lower the recommended capacity, knowing it may cause warranty issues. the only thing I could figure is maybe the lesser capacity is intended to lower the oil level in relation to the crankshaft to avoid aeration issues in the oil (and mabe squeeze every last drop of fuel economy out of the engine). either way if I read the manual, under oil capacity and specifications, it doesn't mention whether to add a half a quart to the capacity for the performance package or Dark horse models with the added oil cooler. unless they figure the oil does not drain out of that system on an oil change. I did see on the Ford performance website, that the stamped steel oil pan was listed at a capacity of 9.5 quarts but that's without a filter also.

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[Germansheperd]

who knows. I don't think Ford would intentionally lower the recommended capacity, knowing it may cause warranty issues. the only thing I could figure is maybe the lesser capacity is intended to lower the oil level in relation to the crankshaft to avoid aeration issues in the oil (and mabe squeeze every last drop of fuel economy out of the engine). either way if I read the manual, under oil capacity and specifications, it doesn't mention whether to add a half a quart to the capacity for the performance package or Dark horse models with the added oil cooler. unless they figure the oil does not drain out of that system on an oil change. I did see on the Ford performance website, that the stamped steel oil pan was listed at a capacity of 9.5 quarts but that's without a filter also.

By the time you add filter capacity and oil cooler you are up to 10.5.
My wife’s old 2022 GT non-PP took 10qts to put it in the middle of the cross hatch and 10.5 to put it at the very top dot when I changed the oil.

 

[Doug Watson]

My 2024 owners manual says 10 quarts but Ford says 9.5 and the manual was corrected for 2025 models. I also have issues with oil levels so Ford is now doing and oil consumption test. I also have the repair manual and it states run the engine for 15 minutes then let sit for 15 before checking the level. It makes a difference. The old school method of checking when cold before starting is not relevant anymore according to Ford.

 

[Ewags81]

reminds me of one of my customers boat engines. somebody had replaced short block, long block, who knows. wrong dipstick tube. had to suck all the oil out fill it to capacity and then use a Dremel tool to make new hashes on his dipstick until I finally convinced him to let me replace it. Ford should figure it out and send us all new dipsticks cuz I can't let it hang around the bottom dot and beat the crap out of it. just can't.

 

[DarkkMatter]

That's disappointing, to say the least.

Curious, I read Ford's Pre-Delivery Inspection checklist. While the attached specifically says check the windshield washer bottle and coolant reservoir, it says nothing about checking the oil level. That's a fail. It does say check all under hood components for leaks. Someone might have very well done that. And seen nothing. But it's not the same as checking the dipstick, is it?

Glad to hear you got things sorted.

https://www.mustang7g.com/forums/threads/new-car-acceptance-checklist.158844/

Thankyou for this checklist! Printed it out and going to manually check everything myself.

 

[robvas]

Has anyone like AED ever dynoed a Coyote with 8, 9, 10, 11 quarts of oil to see what the difference is? Old drag racer trick to run a little less oil because depending on the engine it can make more power.

 

[Frogdog1]

I'd like to know "where you heard this".

The OP is rather alarming without quoting a source. My dipstick shows half way as delivered.

 

[Cz_Ziemniak]

Has anyone like AED ever dynoed a Coyote with 8, 9, 10, 11 quarts of oil to see what the difference is? Old drag racer trick to run a little less oil because depending on the engine it can make more power.

I'd sooner run a lighter weight than run less.

Theres only two ways this makes sense in my eyes.
1. You have less oil passing through the pump, leading to worse protection and increased wear
2. The oil was hitting the crankshaft, causing cavitation, which is a wholly different problem anyway.

The oil is just sitting in the sump. 5 qts, 10 qts, however much, I cannot imagine a scenario where this makes sense.

This almost sounds like the surge of power on a two-stroke before the motor seizes because it ran the oil tank dry, lmao.

 

[robvas]

I'd sooner run a lighter weight than run less.

Theres only two ways this makes sense in my eyes.
1. You have less oil passing through the pump, leading to worse protection and increased wear
2. The oil was hitting the crankshaft, causing cavitation, which is a wholly different problem anyway.

The oil is just sitting in the sump. 5 qts, 10 qts, however much, I cannot imagine a scenario where this makes sense.

#1 is caused by #2 and that can cause a loss in power

 

[Cz_Ziemniak]

I have literally never seen an engine with factory recc fill hitting the crankshaft - ever. Old, new, American, Italian, British, - Never.

 

[robvas]

I have literally never seen an engine with factory recc fill hitting the crankshaft - ever. Old, new, American, Italian, British, - Never.

It's not necessarily the crank hitting the oil but throwing the oil around all over the place. Lookup windage.

 

[Cz_Ziemniak]

Me, personally, not underfilling my car.

 

[robvas]

Me, personally, not underfilling my car.

Just sharing an old drag racers trick...asking if anyone has dynoed it on these engines.

Overfilling it can be bad. Potentially losing pressure at high RPM. Again just looking for test data...before everyone runs out and adds a quart.

 

[Ewags81]

Overfilling it can be bad. Potentially losing pressure at high RPM.

agree. thats why i'd feel better if they'd figure it out and send us all an updated dipstick. or at least provide an owner-discount part number. sure its the same as filling to a different specified spot on the current stick, but i think it'd put a lot of our worries to bed if it was correct. then dark horse, gt, gt pp we fill to the stick and add capacity when applicable for oil cooler. or maybe that half inch half quart really isn't as important as we all think

 

[LouG]

I noted that the manual has a very specific warning against overfilling, as in past the dot.
I haven't seen that before, most cars can take a litre too much without issue.
I'd guess that the Coyote has a very tight margin before windage and foaming affects oil pressure.

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