Ok allow me to rephrase my statement. Gasoline produces approx 125,000 BTU or 131 megajoules of energy per gallon. That number should be consistent, So ... the difference between exxon, shell, wawa is? A 100 watt light bulb produces the same 100 watt worth of light regardless if it is a GE or Phillips or Sylvania...etc
But as posted earlier, I'm still going to try the so called tier 1 and will post my findings.