How harmful to the engine would it be to change from synthetic to regular motor oil?

I have a 2005 Nissan Altima 2.5S with 26k on it and got it brand new. I've been putting in synthetic oil (Mobil 1 5W-30) since my first oil change. I'm thinking about selling the car and need to know if have to tell the next owner if they have to put synthetic oil in.How harmful to the engine would it be to change from synthetic to regular motor oil?no you dont have to tell tehm anything. you can tell them you always have used synthetic and how often you changed it...may make a good selling point, as synthetics are supposd to be better for the engine, and changing back wont hurt it...How harmful to the engine would it be to change from synthetic to regular motor oil?I did it with my Ford ranger after 120k miles and noticed no difference. But I would tell the new owner.How harmful to the engine would it be to change from synthetic to regular motor oil?No, it won't hurt it at all.How harmful to the engine would it be to change from synthetic to regular motor oil?you can do it, but will have to change the oil more oftenHow harmful to the engine would it be to change from synthetic to regular motor oil?For starters, you should NEVER start a car on synthetic motor oil. You have to give the engine enough time to %26quot;break in%26quot; so the valves and rings will seal properly. If you did your first oil change at 3,000 miles, you're probably OK, but you're really better off waiting until 10,000 miles on a new car to switch to synthetic. Secondly, switching from synthetic to regular motor oil won't harm the engine, so don't bother telling the new buyer that he/she should run synthetic motor oil in it. It really doesn't matter either way. While it is true that you will generally have less engine wear running full synthetic motor oil over time, as long as you change your oil regularly you'll be fine.How harmful to the engine would it be to change from synthetic to regular motor oil?What does the owners manual call for ?How harmful to the engine would it be to change from synthetic to regular motor oil?No unless the motor requires synthetic it will not harm it at all. It is only when the car is old and you are going from conventional to synthetic that there is an issue.How harmful to the engine would it be to change from synthetic to regular motor oil?26k is low miles , if you been running synthetic thats good the next owner will glad to hear that , good selling point i put synthetic in my porsche , and so will my future ferrari ....How harmful to the engine would it be to change from synthetic to regular motor oil?yes i would tell them because that will help you sell the car but you dont need to because it dont matter what type oil you put in it and someone said need to change it more not true you wont need to change it as much the other guy said wait until break in there is no break in on cars today that is done when they build the car it is great that you have used this oil that long the car will last much longer