I read somewhere that not using the A/C is going to give you a MINIMAL increase in gas mileage- but on most NEWER cars its such a small amount, its not worth it (especially for the discomfort during the heat of the summer).

How about clustering your stops so that you do all things in an area of town at once, instead of zig-zagging across the town for each errand?

It sounds to me like the person who wrote this is using old information that was applicable 20 years ago, to 20 year-old cars and NOT newer cars that are a LOT more efficient.

whoever wrote that article didnt do any research, just based it on hearsay- and stupidity.

--and blowing up tires to 40 PSI sounds extremely dangerous, along with coasting in neutral. What an idiot.