You need to read as much literature as you can on your unit and units in general.Keep dust down and tidiness up.Keep pressure correct,don't let oil tank get to much below 1/8th.Watch tech.a few times.(most do not like but maybe cookies?)After might do basic parts and cleaning but then it's your responsibility.Takes special equipment to check and adjust.
howtomendit.com for free repair help, information and advice.
Try fixfault.com to fix home heating systems.