will engine block crack? its at 70k miles oil change once a year low mileage

Hello, it is true that Honda Civics for a period could develop a cracked engine block. Honda had an extended warranty coverage (that has since expired) to assist owners of Civic's with this issue. There's no reason to suspect you are definitely going to have that problem with your vehicle. As with any car and any problem, some vehicles are affected and some are not. That said, I would definitely keep an eye on this concern so that you do not have a mechanical breakdown. Make sure a technician you trust is looking during normal maintenance for coolant leakage from the engine.