calicamper
Expedition Leader
I've also wondered why some of the high MPG diesels don't seem to make it to the US. A while back one of the soon to be released manufacturers (Elio motors, IIRC) had wanted to use a tiny diesel in their then-planned 180+ MPG hybrid. They had a perfect motor but California EPA wouldn't approve it (EPA bashing is in a different thread). The explanation on the manufacturer website at the time, and the reason they explained that we can't get some of those cool diesels here, is that California EPA has a particulates-per-gallon-burned standard for diesels. Europe, and everyone else, uses a particulates-per-mile-driven standard for diesels. Your 14 MPG F350 meets EPA because in that 14 miles it's clean enough to meet the standard. The 45 MPG import puts out a bit more particulate each 45 miles than the F350 does in 14 so it fails. The 45 mpg import is much cleaner per mile driven but that's not the standard used by California (and therefore the rest of the country). Makes little sense to me to have that standard, but I'm guessing the big three US pickup truck manufacturers and some oil companies work hard to keep it that way. Selling us giant diesel trucks and fuel for them is profitable.
I recall that CA and several other states share the same standards but yes I recall reading something along those lines also. Its sorta along the same lines as the business tax write offs for years you couldn't buy a fuel efficient passenger car for your business and write it off but you could purchase an F350 and write it off. LOL