10 year old engine??? most junkyards price there motors based on mileage not the year it was built.

 

I'm pretty sure it is not burning more than a quart.

 

if its just a quart bewteen oil changes...thats not that bad.

 

So why do the 5.4 seem to use oil my 1999 f150 has 55k and always uses up about a quart every 3k thats when I change it and filter.but my 1998 4.0 explorer and my 07 mustang gt/cs don't use a bit between oil changes why is this no leaks no smoke from 5.4 runs great.........

 

A quart in HOW MANY MILES, please?

 

that's not bad , i have 100 k on my 04- with once ayear amsoil 0w20 and amsoil eao oil filters[mfd] by donaldson-i add maybe a qt in a years time between servicings

 

After about 1,000 miles it starts to burn.

 

and your changing your oil every 3k?? if so 1 quart is nothing to be to worried about.

 

Yes Keith I change my oil and filter every 3000 mile I was just wondering why 2 of my fords don't use a drop of oil and the other uses a quart betwwen changes..........no leaks no smoke so where is it going?????????

 

it may actually be used up by the engine in the lubrication processes, and thus, not "burnt up"

 

That's STILL not what I'm asking.

HOW MANY MILES does it take to use exactly ONE QUART of oil?

Okay - on my truck, my last oil change was at 84,700 miles. 6 quarts filled it to about 1/3 of the way between the ADD and FULL lines. At 87,000 miles it was exactly on the ADD line. I added one quart, this filled it to the FULL line. I now have 93,500 miles on it and it's exactly on the ADD line. 93,500 - 87000 = 6500. I used ONE QUART in 6500 miles. Can you do the same math and tell me how many miles it takes you to use ONE QUART, please?