Quote:
Originally Posted by Ed-in-Maine
I don't remember which car it was but about 20 years ago, there was an "Ultra Clean" car who's exhaust was "cleaner" than the intake air  I was in LA back then at Hughes Aircraft and from our hill top we could only see Long Beach about once a month  I was happy to leave that city in the rear view mirror. So yeah clean is a relative term.
Ed  |
I haven't read the entire thread yet so pardon me if this has already been discussed. My recollection is that it was a Volvo, that the comparison was specifically in terms of NOx, that it was some city or another in Cali, and that it was due in no small part to the quality of the air going in.