17.8 MPG can be done with the V10.
 

I came across a gas station that had marine grade no ethanol 89 octane...
Sure it costs about .30 more per gallon, but since I was on empty I decided to try 10 gallons.

So after a 40 or so mile run on the (flat) hwy@ 65mph, I got back 17.8MPG.

Hardly scientific, but when I usually see 15 mpg on that stretch of hwy and then I see that, I'm sold.

I have a shell station that sells 93 octane non ethenol. Might try and see what happens.

Just got back to MI from AZ pulling about 12,000#. A lot of places in the midwest charge more for reg than plus. (the plus contains 10% ethanol) Lost a solid half a mile to the gal. with the plus. Just sayin..

You where at 15 and etched out 17, I wouldn't mind to see a steady 12 and 13 would just tickle me pink.

I once (once!) got 17.2 on 10% ethanol on a 500 mile round-trip... usually upper 16's on the same trip.

I've never even seen 16, except coasting! I do get about 13.8 when using the non-ethanol fuel versus 12.8 with the ethanol.

Yep, somebody is having a good dream. Don't trust the lie-o-meter

Hmmm, those of us with '08's seem the most skeptical. 17.8 would be down hill with a tail wind with mine. Very best average on long runs is in the mid 13's. Normal is 10-12.

Try a few full tanks of normal driving and then report back hand-calculated mileage. It is no surprise non-ethanol fuel give you better mileage, but short trips are not a good overall average.

Having said that, I can't wait to try it this summer. I've already mapped out stations that have non-blended fuel where I'm traveling.

Because one or two choices are not enough (sure miss those prices):

http://upload.wikimedia.org/wikipedi...ne_Ratings.jpg

According to the this site: Ethanol vehicles running ethanol will typically go 3–4% fewer miles per gallon on E10 than on straight gasoline.


Here is a nice calculator that makes it simple:
http://data.desmoinesregister.com/fu...calculator.php

To be a better deal:
E10 (gasohol) should be close to $3.70 or less.
Price of unleaded: $3.83

So based on these calculations, I would have to pay about $.13 less a gallon in order for E10 to be worth buying.

Gasoline = 114k btu
Ethanol = 112k btu
1.0 gal of gasoline = 1.02 gal of ethanol

Why I won't run ethanol in my V10? Because it is not a daily driver. Ethanol has a weakness if it sits. It absorbs water more the gasoline. If it absorbs water then it will decrease the octane rating below the safe level for engines and cause harm. If I have to add additive, then why bother buying it in the first place.
Gasoline Octane and E10 Ethanol Blend Fuels

V10's have knock sensors, so that's not really a problem, as long as 4 degrees of retard can get rid of it, that is.

Funny thing is, at 4% increase in MPGs, my 17.2 comes out at exactly 17.888, 3% is 17.716

500 mile trip, hand calculated. Usually that run is 16.5-16.8, but I was running slightly slower, around 60MPH, instead of the usual 70.

Was that the 5-star economy tune?

Actually, no. that was completely stock, but with the y-pipe, Volant and ebay headers, if I recall correctly. None of which ever changed my MPGs overall.

With the tune, I can't keep my foot out of it :-X03

Um yea.........me too. Short trips towing/hauling kill me and as of recently haven't been out of the 8's. Oh well I still love it.

I've been commuting 44 miles a day, about half of it stop-and-go, and getting 11.

I found a few things that make a world of difference. Even if it's a clogged highway, where you can only get up to 30-40 MPH, as long as there's no traffic lights or stop signs, it helps a LOT. If I take a "short cut" (same distance, but faster overall) that includes lights and stop signs, it drops below 10.

No idling. I usually stop at the beer distributor for 10 minutes twice a week, or warm up the truck in the winter before taking off. If I do that type of stuff, I lose 1MPG easily. Any time that the engine is running and you aren't moving, or have to accelerate back up to speed, there goes the gas.