I drive a daewoo chairman which is powered by a Mercedesbenz engine. what can i do to protect the engine ?

what can i also do to ensure fuel efficiency for my daewoo chairman vehicle ?|||First of all, always perform oil changes at the intervals specified in your owners manual.Or about every 5000 miles.Flush your coolant system once per year.Drive reasonably.Do this and it should last you a good long time.Mercedes has set the bar very high for reliability and solid engineering.