Chucky, There is a real difference in the price of LPG and gas there, like 3 times. I don't believe we have the same difference.
There two methods for rating the octane of a fuel, RON and MON, and to confuse things in the USA they average the two. Our octane rating ends up being 4-5 points lower than yours in Europe. Here's a link to an explanation;
http://en.wikipedia.org/wiki/Octane_rating What octane an engine will run on depends on more than CR. Combustion chamber design and cam play a part too. If I get into it any deeper, I'll be way over head.
Larry
