Pano umiilaw? You mean once the engine has started the indicator is still lighted? If the signal does go off and does not go back on again while the engine is running, there should be no problem. Make sure oil levels are at the desired range. Normally the indicator does not turn off immediately after starting. You mentioned it does stay on longer pag matagal di nagamit, maybe it's because your engine internals are still dry and will take more time to be fully oiled because oil does go down completely when engine isn't run for long periods of time.