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Discussion Starter · #1 ·
So I loaded my 87 performance tune and I averaged 24 mpg
With the OEM Ford tune I averaged 22.5 mpg
finally I loaded the economy or mpg tune and I averaged 13 mpg :?

I actually am quite impressed with the 87 performance and wouldn't expect the mpg tune to achieve much more than + 2 mpg

Anyone else experience this too? Should I be looking at replacing something? My E is totally stock, 80,000 miles with the 2.3. I recently put a new fuel filter in it, plugs and ran some sea foam through the tank.re
 

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So I would try running the Eco tune for a week and see if you notice any difference. I always run 87 performance on my V6 because I get better power and same MPG's as stock. The Eco tune did get me better MPG's about 2 MPG, but I noticed a serious change in the shift points, which kept the engines rpms down and reduced power so it felt like a 4 cylinder.
 

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Discussion Starter · #3 ·
It was run for a week. I am going to try it again though. I am really liking the 87 performance, better shifting, no throttle lag when you first start off and good mpg too.
 

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When I tried the 87 eco tune on my 2.3L I4, I ended up using more gas as I was always trying to floor it to get going faster. My 87 oct performance tune seems to work pretty well and I get a tad better than stock. I think the only time I'll go to 87 eco tune is long hwy trips. I just recently had a 10 hour drive (one way) and was getting 26mpg. But around town, it drives me nuts how slow it is, so I go 87 performance.
 

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Discussion Starter · #5 ·
I filled up the tank and loaded the mpg tune again. I know what you mean about using the 87 performance, it improves everything.
I will be driving from Illinois to Colorado next week so I will have a good test for the different tunes then.
 

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Discussion Starter · #6 ·
Ok, so I must have done something wrong before with my math, I ran the mpg again and got 24mpg on the economy tune.
 

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Eco really I've only seen good mpg on hwy trips. Otherwise, performance is the better dd. Getting mine done today for the v6. Will update on it.

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So after 1/4 a tank the auto gauge of mpg average is 2 higher than it used to be... So far so good. The last 2-3 tanks averaged 15.1

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