"PEW pew! For a week last November an internal combustion engine hummed away in a lab near Chicago. Why the excitement? This particular engine sets fire to fuel with lasers instead of spark plugs, burning fuel more efficiently than normal."
Lasers Set to Zap Engines into Running More Efficiently
http://www.newscientist.com/article/...ficiently.html
New Scientist
20 February 2015
Gas Engine Accessory? Maybe +2 mpg (only +1 if it started below 10 mpg), add 15% to engine cost?