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Discussion Starter · #1 ·
ok...ive heard a lot of different oil capacities for my 2003 ford 7.3 liter...and...i was wanting a final word...i was puttin oil in my truck...and i poured 16qts in...on accident..(wasnt paying attention on the last gallon) and i was wondering if that is going to hurt anything...i put motocraft 15w-40 right at a little shy of 16 quarts...
 

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Discussion Starter · #2 ·
:bump::bump::bump:
 

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4 gallons... thats what they take.
 

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yeah, it's a bit over, I would suggest loosening your oil pan plug and draining a bit out. Usually overfilling isn't a good idea. Some of the techs would be better suited to tell you if there is any danger. I have always been told it could cause engine damage. too high an oil pressure and such
 

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Desert Storm Vet
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4 gallons... thats what they take.
thought it was 15 quarts, just under 4 gal. when i do the 15 quarts, i am at the top of the cross hatch.
 

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it shouldnt have higher oil pressure cuz u have a little bit over the full line as the non used oil would sit in the pan...... when i put 4 gallons in my truck it hits the full line right on the money.
 

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i think your good, but the number is 15 qts. thats why motorcraft you get 5 qts in the jug.
 

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yeah, it's a bit over, I would suggest loosening your oil pan plug and draining a bit out. Usually overfilling isn't a good idea. Some of the techs would be better suited to tell you if there is any danger. I have always been told it could cause engine damage. too high an oil pressure and such
The main reasons not to overfill your engine oil is because of the following.

One, if the oil is filled too high to the point that it is contacting the crank/connecting rods this adds added friction/restriction to the rotating masses, no a good thing.

Two,the real concern is that because the crank/connecting rods are contacting the oil, it can often "whip" the oil into a froth, this will create inconsistent oil pressures and air in the oil, thus can cause major damage because of lack of lubrication. You may or may not see the same oil pressure reading on you oil pressure gauge when this is occurring so you will think you are fine when you are not, but there is now air in the system. The oil pressure will never increase when you over fill a sump either. Bottom line fill to dipstick operation levels and no higher, you won't have to worry if you do this.
 

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Stock should be 15 qts, 4 gallons if you have a bypass or anything like that. My ex calls for 15.
 

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ok...ive heard a lot of different oil capacities for my 2003 ford 7.3 liter...and...i was wanting a final word...i was puttin oil in my truck...and i poured 16qts in...on accident..(wasnt paying attention on the last gallon) and i was wondering if that is going to hurt anything...i put motocraft 15w-40 right at a little shy of 16 quarts...
:::dunno::dunno: I've read in the Power Stroke Registry mag. that he does this on all 7.3's. I feel that extra qt. is being whipped and air bubbles ar not helping with lubication. Just like when your fueling your truck with diesel fuel. (alot of foam as the tank fills up) air. I feel the other thing is your adding more oil into the turbo system through your crankcase breather. I blew the turbo hose off once under a load while pulling a hill with 18600 gvw. Thought I blew the right front tire off. (Gets your attention.) I've been using Shell 15-40 with the Motorcraft filters and I change it every 2000 miles. The reason it pulls the 18600gvw 95% of the time. Its qutie a puller (love it) have to keep look behind to see if i lost the trailer. Its a 2000 f350 cc, drw,3.73 gears 6 spd. Hope I helped some.
 

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i've always put in 16... according to my 97 ford manual, it's 15.9 but i put in 16 and it's always been absolutely fine
 

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16 quarts if you completely drain the entire system then refill. 15 quarts is what i have used and that gets me to the full mark on the dipstick.

10 quarts on the 7.3 IDI.
 

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It is 15 quarts.
 

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Discussion Starter · #14 ·
well i usually do 15 quarts...and i will from here on out...i was just wanting to know if it is gonna mess up...i shouldnt pull anything with it until at least the next oil change..and i did completely drain the oil...filter...pan...all of it...
 
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