Former owner of 01 Civic EX now in extended family stable ~285k+ miles my speculation would be worn valve guides as much as anything. The 01 Civic began to use some oil, not visble at tailpipe and maybe ~1/2 qt every 1500 miles. However it does have a small sump.
Replace the PCV as first step, but I doubt it will make a huge difference. I would not do anything extreme or even a piston soak. As recommended earlier use least expensive API rated conventional oil, add when needed and change it with consideration of those adds in mind. Can go to 5w30 and/or HM oil to give it a try though I doubt that make a huge difference either.
Really your use not terrible. If want to keep it awhile make sure timing belt water pump service has been done and just drive it. Head gasket also a common needed replacement item on these models.
Replace the PCV as first step, but I doubt it will make a huge difference. I would not do anything extreme or even a piston soak. As recommended earlier use least expensive API rated conventional oil, add when needed and change it with consideration of those adds in mind. Can go to 5w30 and/or HM oil to give it a try though I doubt that make a huge difference either.
Really your use not terrible. If want to keep it awhile make sure timing belt water pump service has been done and just drive it. Head gasket also a common needed replacement item on these models.