i recently just rebulit my 5sfe motor, all new internals. i recently did an oil change on it and i do check on it periodicly, its been about 2 or 3 weeks since i put new oil in it, and my dipstick reads maybe a quart of oil now. i am 100% sure i dont have a leak, and its not being burned. where could it possibly go?

i do get a code 25 all the time which is lean air/fuel, so is it possible its just evaporating from excessive heat?

possible but also when the engine gets rebuilt it typically takes 1000-5000 miles for the rings to seat depending on oil and how your break the engine in

dont use synthetic for at least the 1st 6000 miles though