Is is standard practice, or even possible to use the SAFC to tune down in the lower rpm range for normal driving? I understand, and have tuned, for proper A/F ratio in the upper RPMs to maximize power and prevent knock. If you look at the graph, I am talking about the region below 3500rpm. If it were closer to 11 or even 12 my gas mileage should get a little better under daily driving easy going conditions, right?