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<blockquote data-quote="cody6766" data-source="post: 2493493" data-attributes="member: 26511">Yup, I have an 11 F150 with the ecoboost engine. When I got it I tested different fuel grades to see if I saw any difference in performance (very subjective) and mileage (objective w/a handy dandy calculator). I shoot down a few country roads and hit the highway for about 2 miles before rolling on to the base. I make a few short trips into town, but not much changes week to week. My driving is very consistent, both where and how, so it&#039;s a pretty good test. I ran 2 tanks of each: 87 octane, 91 octane and 10%etOH and compared numbers. I lost almost 2mpg with the etOH gas and had no changes between premium and regular. In the city, my new, fancy, &#039;fuel saving&#039; engine got almost the same mileage as my 01 F-150 with the old 5.4L. My mileage jumped from 13 to 15mpg when I dropped etOH.It&#039;s not a monthly budge buster, but filling up with the &#039;more expensive&#039; 87 w/o etOH, I&quot;m saving about $10/month based on my driving habits. With all of the etOH negatives, I can&#039;t fathom why I&#039;d pay more for an inferior product.3.8mi/$&nbsp; &nbsp; I drive ~1125mi/month =&nbsp; $269/month @13mpg4.3mi/$&nbsp;&nbsp; 1125mi/month =&nbsp; $261/mo @ 15mpgthis is assuming $3.40 for etOH and $3.50 for 87</blockquote>

[QUOTE="cody6766, post: 2493493, member: 26511"] Yup, I have an 11 F150 with the ecoboost engine. When I got it I tested different fuel grades to see if I saw any difference in performance (very subjective) and mileage (objective w/a handy dandy calculator). I shoot down a few country roads and hit the highway for about 2 miles before rolling on to the base. I make a few short trips into town, but not much changes week to week. My driving is very consistent, both where and how, so it's a pretty good test. I ran 2 tanks of each: 87 octane, 91 octane and 10%etOH and compared numbers. I lost almost 2mpg with the etOH gas and had no changes between premium and regular. In the city, my new, fancy, 'fuel saving' engine got almost the same mileage as my 01 F-150 with the old 5.4L. My mileage jumped from 13 to 15mpg when I dropped etOH. It's not a monthly budge buster, but filling up with the 'more expensive' 87 w/o etOH, I"m saving about $10/month based on my driving habits. With all of the etOH negatives, I can't fathom why I'd pay more for an inferior product. 3.8mi/$ I drive ~1125mi/month = $269/month @13mpg 4.3mi/$ 1125mi/month = $261/mo @ 15mpg this is assuming $3.40 for etOH and $3.50 for 87 [/QUOTE]

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