[CopperTop]

"..his particular engine sets fire to fuel with lasers instead of spark plugs.."

Sounds like a nice way to make future "spark plugs" cost $100 each.
Geezes I'm cynical in my old age. d:^)

[WayneS]

Most newer cars go 100,000+ on a set of spark plugs.

Depending upon the actual improvements in fuel mileage realized, $400-$800 for a set of “laser” plugs every 100,000 miles or so might be economical.