Weird thing is, first tank of fuel did 250 miles, which was hours of heavy traffic (what it was bought for), and being floored to see how it went.
Second tank, I drove it quite slowly with light throttle to see how many miles I could get out of it, which returned 210 miles.
This tank, I'm driving it 'however', and getting better mpg!
Hmm, maybe they like going at speed...!