Fuel prices vary by State as well, quick visit with friend in Oklahoma, filled up for return trip at $ 1.88 per gallon.
Yes it's less costly to produce diesel, but as most goods are transported by the big diesel rigs, good ( tax ) good revenue stream for government.
On the low beam subject I just received these https://www.amazon.com/gp/product/B01JY ... UTF8&psc=1 Good review on the US Transit forum, will fit and test soon.
MM