Yes, 2000 miles per quart is somewhat unusual for a later model Honda Civic with only 70K miles. If you sell to a private party, I would let them know about it just as a courtesy to them since it is somewhat unusual for that make and model of car.
As you can see on my signature line, I own a Saturn SL. These cars are known oil consumers, and mine is no exception (like the OP's, it also uses about 1 quart per 2000 miles). I wouldn't necessarily go out of my way to disclose that if I were selling it, since any buyer who does some research on Internet forums like Saturnfans or BITOG can find out that oil consumption is typical for those cars. Like the old saying goes, caveat emptor (let the buyer beware).
One could make the argument that a private buyer should expect any used car to use some oil, but in your case (if you go the private sale route) since you are aware of it and know about, AND you have a make and model that is not known for using more than one quart between a 3000 to 5000 mile oil change, I think you should disclose it.
If you trade it in to a dealer, I'm not sure I would say anything since the dealer SHOULD give the car a good going over by their mechanic before agreeing on the amount of money to give you for it.
As you can see on my signature line, I own a Saturn SL. These cars are known oil consumers, and mine is no exception (like the OP's, it also uses about 1 quart per 2000 miles). I wouldn't necessarily go out of my way to disclose that if I were selling it, since any buyer who does some research on Internet forums like Saturnfans or BITOG can find out that oil consumption is typical for those cars. Like the old saying goes, caveat emptor (let the buyer beware).
One could make the argument that a private buyer should expect any used car to use some oil, but in your case (if you go the private sale route) since you are aware of it and know about, AND you have a make and model that is not known for using more than one quart between a 3000 to 5000 mile oil change, I think you should disclose it.
If you trade it in to a dealer, I'm not sure I would say anything since the dealer SHOULD give the car a good going over by their mechanic before agreeing on the amount of money to give you for it.