30c is 5–7% discount over the field. Fine, if it's on your way. But if you drive a SUV it likely costs as much to drive to the discount as the savings are worth.
Not to mention the time lost waiting in line. This is a concept lost on many if not most people. Other truisms that are lost on people:
1. Going 20 mph over the speed limit not only burns more fuel, it only saves a minute or two in trip time for local travel.
2. Leaving heavy things in the back seat unsecured can result in them becoming deadly to front seat passengers in an accident.
3. Rapid acceleration burns way more fuel.
4. The road is very slippery right at the beginning of a rain.
5.Braking in an emergency requires not just skidding distance but also reaction time distance. Tailgating is just not worth it.
6. Your position in traffic in a traffic jam is meaningless to you. Being 10 cars ahead by cutting in will only save seconds in your total trip time, but your disruption of traffic may result in people losing tens of minutes behind you.
7. Racing to close the gap to the car in front of you in a traffic jam only exacerbates the problem for people behind you by continuing the "accordion effect" on traffic. By instead going at a slow but steady speed regardless of how much distance between you and the car in front of you can help to smooth out the accordion effect for the cars behind you.
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