In this general area about all gas comes from the same refinery...except for the additives that might be different? I have tested gas for ethanol content by adding some water and shaking a graduated cylinder to get it "dissolved" into the water....works...crudely. Can't find non-ethanol laced gas near here though.
Rereading the instructions...I guess they do say that a max of 1K miles is needed to bond the boron...though it sort of goes against the grain to change it again after 1K miles. But if it does loosen up some gunk...probably a good idea to get it out.
With that sort of accurate and detailed testing...I think you should test some fuel additives? I had good luck recently using Techron....but only saw an mpg gain using about 1/2 to 1/4 the concentration they call for...after using the higher concentration though. Would be interesting to see if Techron or other additives are adding "energy content". Hard to distinguish between "increased energy content" and "increased lubricity" and "decreased gunk drag" (new term
) in some cases?
Gasohol vs straight gasoline...regular vs premuim?
Or better yet...the MS fuel system additive. Easy for me to say....
