Line loss in US in 2007 was estimated to be 5% in 2013 (http://www.eia.gov/tools/faqs/faq.cfm?id=105&t=3 http://www.eia.gov/tools/faqs/faq.cfm?id=105&t=3) For

Line loss in US in 2007 was estimated to be 5% in 2013 (http://www.eia.gov/tools/faqs/faq.cfm?id=105&t=3 http://www.eia.gov/tools/faqs/faq.cfm?id=105&t=3) For gasoline the number is supper tricky to determine. So here comes a back of napkin number A fuel truck transports about 30,000 gallons (20,000-40,000). On average they achieve about 4-7.5 miles per gallon). So they use about 1% of their tankage for every 60 miles traveled. This suggest to me that transportation loses for gasoline are in the same ball park number. Distribution and marketing is often claimed to be about 5% of the total, but I don't know where that number comes from. All in all the difference is probably not that large, and I suspect the electricity one will drop faster than the gasoline one due to interconnect upgrades.