Worst diesel engine

from day one since I have purchased this vehicle it has continuously being consuming oil and Honda guys are not being able to fix the problem, Just for information I owned a Toyota make qualis (diesel) which i used for 5 years without a snag, also a hyundai santro (petrol) for 10 years without a snag, also currently owning a Toyota Innova (diesel) for 3 years without snags & lastly Honda Jazz from january 2017 (diesel) which normally likes to be at the honda work shop. Now also