how to increase fuel economy with a turbo
#11
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Regardless of whether it does/doesn't... you're going to spend between $4,000-$4,500 and still have to run a higher octane of fuel than what you're running now to save 1-2 mpg? If you want to boost to help pull your trailer around and what not, go for it... but imo if you're doing it solely to see mpg increase just save the money for the pump. At the very most you will save yourself around 3 gallons per fill up ($12) if you can keep your foot out of boost. Assuming you fill up once a week that's approx. $625/year... it would take you 6.5 years for the turbo to start paying for itself not factoring in higher octane fuel costs.
#12
Diesel. Just go diesel. Mileage for the most part won't change with adding a turbo unless you add a cam. When I removed the turbo from my lq9 my mpg stayed exactly the same. 10.5 mpg. It might have been different or better with a retune but I have not even drivin it since installing the retuned computer.
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