# Gas mileage thread

**URL:** <https://forums.speedlife.net/t/gas-mileage-thread/50164>\
**Category:** NYSpeed Automotive\
**Created:** [June 17, 2008, 6:26pm UTC](https://forums.speedlife.net/t/gas-mileage-thread/50164 "2008-06-17T18:26:01Z")\
**Posts on this page:** 1\
**Showing post:** 76

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**Author:** ![Joe](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/joe/32/7219_2.png) [@Joe](https://forums.speedlife.net/u/Joe)\
**Post date:** [June 19, 2008, 12:31pm UTC](https://forums.speedlife.net/t/gas-mileage-thread/50164/76 "2008-06-19T12:31:24Z")

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> [@LXTASY](#):
>
> '93 SHO  
> 216K  
> Stock 3.2 with manual trans swap  
> average 27mpg around town , 32mpg highway @ 75mph  
> 87 oct.
> 
> '93 Mustang  
> 45k on engine  
> Heads/cam/intake/exhaust/T5/3.73’s  
> average 17 around town always, 24mpg highway @ 70mph  
> 93 oct.
> 
> I’m really amazed at how little fuel economy has really changed in the past 15 years…there shold be no reason why my high mileage, 1980’s designed SHO can pull equivalent numbers to todays cars.

Sure there is. Power output is a function of fuel burned. Unless they somehow found a way to extract more heat energy per gallon of gas, it always will be. In this case, manufacturers chose to double/triple the amount of power and hold MPG constant. They likely could have gone the other way if we had continued down the (gay) path of the 80’s, and if today’s cars didnt have an extra thousand pounds of safety features.

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