Rand,
When you checked the oil, had the truck been sitting on a level surface for a couple of hours?

After putting exactly six quarts in, I let the truck sit for awhile before checking. The level looks good at that point. After the truck has been running, I've checked the oil at a gas station and it appears low. I didn't add any oil because much of the oil is still in the engine and takes some time to find its way back to the pan.

Correct me if I'm wrong about this assumption.

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Model: '99 F150 Lariat Supercab 4x4 SS Mechs: 5.4L, 3.73 Diff (9.75" LSD Rear, 8.8" Front)
ORP: Skid Plates, LT265/70R17 GY Wrang. AT/S
Group III towing: HD Electrical/Cooling, GVWR 6500# (Extra leaf spring).
Stuff: Step Bars, 4W Disc ABS, K&N filter, 0W-30 Series 2k Amsoil @ 8200 miles, Herculiner
Stock Items That Differ Across F150s: Steel Driveshaft, Oil filter bolted to engine w/ drip guard, 4R70W transmission.

 

I am an Amsoil dealer and have been using 0W30 since 3k miles. I now have 99k miles + and it doesn't burn a drop. I change oil/filter "SDF11" every 10k miles. I highly recommend this oil & filter to anyone considering using it. My dealer # is 399109 & name is Mark Breznay.
1997 f150 Regular cab, Flareside
4.6 V-8, 5 speed


Steeda pulleys
K&N FIPK
Airaid Poweraid
Holley plug wires
Jacobs DIS
Accel coil packs
Amsoil products throughout, including PI fuel additive, "this stuff works".
Magna-Flow Muffler w/dual exhaust
Car Sound free flowing cats
Dyna-Glass bed cover
GoodYear 275/60R17 tires on Center Line Cobras
GoodYear 285/65/R17 coming soon for rear
Autolite copper core plugs gapped at .060, next set will be gapped at .070
Get almost 20mpg now
No chip, as i have a 60 mile round trip to work
Dark Toreador Red w/cordovan interior
Alpine AM/FM/CD
Whew, enough already
Love my truck

 

Good question!

It was all the way to the lowest position on the dip stick. I added a 1/2 a quart and its been between the marks no matter when or how I check it!

Weird? In computer terms, this could have been a PEBCAK (Problem Exists Between Chair And Keyboard)... Me?

Who knows... I have not checked it lately. Will do so tomorrow, if I can freaking sleep now, UG!