I will not purchase SunJel ever again.  SunJel must have changed their formula.  I have used SunJel fuel for many years, but now there is a huge difference in flame height, intensity, heat output and  of course length of burn time.  When you first light them they display good intensity for about ten minutes then their flame goes very weak.  They last about an hour to hour and half instead of the 3hours as before. I am very disappointed in this product.