Just wondering WHYYYYYYYY diesel prices have gone from $2. 55 to as high as $3. 29 per gallon here in SOuthern Calif in the last 2-3 weeks?? Gas prices have stayed the SAME. At my local Valero and others, Gas has only went from $2. 33 up to $2. 35 in the same period. Diesel has jumped way high again. WHY?? Doesn't Diesel take less to refine????? Is it the cost of the ULSD??