hi, i have a 98 civic ex coupe with 160k km on it, is it alrite for me to change back to honda engine oil? would there be anything wrong if i change back to honda oil? or should i stick with the synthetic? would my car be running better under synthetic or honda oil?

also with synthetic, i heard there sometimes will be leaks, where would the leaks be? I replace the head gasket and all the glommets already. would i have problems with leaks, or would the oil leaks comes from others places?

thx