If the car has 184k and isn't burning oil yet it might have one of the "good" factory engines. As I understand it most of them (mine included) didn't make it past 150k with a defective factory engine.

-Jason

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1991 350SDL. 230,000 miles (new motor @ 150,000). Blown head gasket

Tesla Model 3. 205,000 miles. Been to 48 states!
Past: A fleet of VW TDIs.... including a V10,a Dieselgate Passat, and 2 ECOdiesels.
2014 Cadillac ELR
2013 Fiat 500E.