DEF isn't that rare in passenger vehicles anymore. Ford's new line of diesels tend to use it, BMW and Mercedes use it, and I feel a couple of other 'new' small

DEF isn't that rare in passenger vehicles anymore. Ford's new line of diesels tend to use it, BMW and Mercedes use it, and I feel a couple of other 'new' small diesels are using it as well. It used to be rare, but I think enough people realized they can't meet standards without it and now they are all moving towards it.