I have used Mobil in a 01 Prelude starting at 20k through the current mileage at 62k. Just change -- no special requirements.
I have a 2005 civic with 8K miles since i do a lot of city driving i am planning on using synthetic oil Mobil 1 on my next oil change. Is there anything i should be aware of when using synthetic. Do i need to do an engine flush etc etc thanks