I get a kick out of the "how to lie with statistics" section.
Using their fuel cost $2.80
Improvement by their test results 3%
Savings, about .08
Diptane costs you -.15
You figure the "benefit"
It's like the lottery, which is a tax on those who are poor at math.
Their statement of cost/benefit
<TABLE height=15 cellSpacing=0 cellPadding=0 width=286 border=0><TBODY><TR><TD width=219>If a gallon of gasoline costs you
</TD><TD vAlign=top width=67>$2.80 </TD></TR><TR><TD colSpan=2 height=4><TABLE cellSpacing=0 cellPadding=0 width="100%" bgColor=#818585 border=0><TBODY><TR><TD height=1></TD></TR></TBODY></TABLE></TD></TR><TR><TD>And Dipetane improves fuel economy by </TD><TD vAlign=top>10%</TD></TR><TR><TD colSpan=2 height=4><TABLE cellSpacing=0 cellPadding=0 width="100%" bgColor=#818585 border=0><TBODY><TR><TD height=1></TD></TR></TBODY></TABLE></TD></TR><TR><TD>You save </TD><TD vAlign=top>28¢ </TD></TR><TR><TD colSpan=2 height=4><TABLE cellSpacing=0 cellPadding=0 width="100%" bgColor=#818585 border=0><TBODY><TR><TD height=1></TD></TR></TBODY></TABLE></TD></TR><TR><TD>Assume that Dipetane costs you</TD><TD vAlign=top>-8¢</TD></TR></TBODY></TABLE>