How to change oil when there's not enought?

I got about 4000 milles on the runway I think the car may need the oil changed. The car started loosing power and need the oil changed, should I trow the old oil and put somenew? I am in the midle of nowere and have not enought oil. What Should I do?How to change oil when there's not enought?Todays cars can go about 7000 miles without an oil change. That shouldn't be affecting your power. Use the oil you have to top it.How to change oil when there's not enought?add some oil until you can get to a place to buy more than enough for the next change. you should not be running the car low, even if you have old oil in it... it's better than none or not enough.How to change oil when there's not enought?If it's a quart or less you should be fine to drive it to a store and buy more. Just don't be racing the engine or driving it a long time a few miles should be okay. An 8 cyl or 6 cyl takes some low oil pressure to hurt it but a 4 cyl you can do big damage in a short time. so depending on which engine you have, you should be able to drive it to a store without damaging the engine if you are a quart or less.