I filled the VW diesel last night. The cost was the same as high end gas, $3.99 .. I have run my truck for the past 13 years on bio diesel that cost me anywhere between 1 and 2 bucks a gallon. Won't be doing that much longer so will just have to grin and pay the costs. Diesel won't get cheaper, the whole world uses it to move goods and there is a demand for it. Just about everything we purchase got to us using some form of diesel. Just an opinion.