My Gas 2001 Ford Excursion V10 is burning oil. The reason I say this is because I do not see any leaks anywhere. Now at start up I usually see smoke come out of the exaust. It is more visible in the winter then in the summer of course. I usually have to add 4 quarts like every 4months. Currently using high mileage 10W30, although oil cap say 5W20. My truck has 207k miles on it, still running strong and smooth at all times idle and running. Sometimes I crank it twice cause I thought it was off. What would be the reason for the loss of oil?

SOURCE: 2001 Toyota Camry oil light on

Your check oil light correct? if oil level is full then you have a bad oil level sensor

SOURCE: high oil consumption 2001silverado 4wd, 4 door 6.0

Every manufacturer has a guideline.  But a quart every 1,000 miles seems higher then necessary.  Try the easy steps first. 1.  Check the PCV valve if clogged will caused pressure in crankcase and oil burning. 2. Remove spark plugs and perform visual inspection.  IF electrode is covered in gook(technical terms, sorry), then oil is leaking into that cylinder.  Most likely cause would be faulty valve stem seals. 3. Worse case scenario, engine oil rings are leaking.  If all else is good.  Perform compression test of each cylinder recording measurement, then add two small squirt of engine oil into each cylinder as you perform a second round, complete both dry then wet compression test on each cylinder before proceeding.  IF any cylinder shows a more significant increase in compression then it would indicate that cylinder's oil rings are faulty.  This is a major repair.  Keep me posted

SOURCE: lost engine oil: 2002 Ford F150 Supercrew 4x4 5.4l engine

This is certainly one of the strangest things I have ever heard as a mechanic. . This almost sounds like some one is playing a game of letting your oil out this vehicle. With no visible leaks no burning smell of oil. However I would recommend that you check the coolant in the radiator and see if the oil is in the coolant. (If they are mixing together) If they are mixing the coolant should have a milky look to it, creamish white. If its good then the only other logical explanation is that the vehicle i s burning alot of oil, but if that was true you would see a grayish blue smoke from tail pipe. If you are 100% sure they are no oil leaks on this vehicle, then this problem is surely strange. Check coolant and get back to me. Good Luck

SOURCE: 2000 ford excursion v10 driving down the road

Honestly you should send it into the dealer. I don't think guessing will help you. Typically it is a dirty connection into the steering column (behind the ignition key) But diagnostics need to be run and a look at the VSS system (through a good scan tool) is needed to confirm.

SOURCE: 2001 Monte Carlo SS 92,000

No doubt valve seals,the oil gets burned so you usually can't see it.Normal for GM motors,actually the small amount of oil will help the longevity of the engine.They can be changed in a few hours but I would leave it alone.When they get really bad if the car sits and idles you will see some smoke. The seal is just a small o-ring ,they get brittle and fall off.The shop can use air pressure at the spark plug hole to keep the valve up,compress the valve spring and replace the seal.