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Old 03-30-2017, 05:25 PM   #1
311-420
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a bit hard to believe

Since I eaton swapped I noticed my fuel mileage really hasn't gone down which I thought was a bit unusual. Adding 135rwhp should do that, right?

I topped off the tank and ran it out until the fuel light came back on and then topped it off again at the same gas pump. It went 220 miles all city on just 12.66 gal. That's a city avg of 17.3 which is higher than my window sticker says (17 city, 26 hwy). I boosted ever so slightly many times during the tank, but no wot/full boost. I think I could get 18+ if I was actually trying.
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Old 03-30-2017, 06:26 PM   #2
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Re: a bit hard to believe

Wow who knew adding boost saves money
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Old 03-30-2017, 06:40 PM   #3
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It really shouldn't change just because you added a blower. She you're not in boost its am NA engine. It's when you keep getting into boost that the mpg drops. And generally it'll do a little better with an aftermarket tine because it's dialed in a little better. Just my experience at least.

Back when I had my 01 I decided to see what kind of mpg I'd get staying out of boost. I got the exact same as when I drove it like normal. Well, normal for me.

You don't have to run it down to the light coming on. Just fill it up and divide the gallons by the mileage on the trip odometer.
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Old 03-30-2017, 06:56 PM   #4
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Re: a bit hard to believe

I'm lucky if I get 16 city. But I have a heavy foot, and my boost a pump is usually working hard.
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Old 03-30-2017, 09:07 PM   #5
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Re: a bit hard to believe

Quote:
Originally Posted by slomach03 View Post
Wow who knew adding boost saves money
lol I wish it saved me money.

Quote:
Originally Posted by 01yellerCobra View Post
It really shouldn't change just because you added a blower. She you're not in boost its am NA engine. It's when you keep getting into boost that the mpg drops. And generally it'll do a little better with an aftermarket tine because it's dialed in a little better. Just my experience at least.

Back when I had my 01 I decided to see what kind of mpg I'd get staying out of boost. I got the exact same as when I drove it like normal. Well, normal for me.

You don't have to run it down to the light coming on. Just fill it up and divide the gallons by the mileage on the trip odometer.
I just thought turning another accessory plus the added weight would equate to somewhat of a significant loss but it doesn't seem like it has.

I ran the whole tank out because more miles will give a better average number.

Quote:
Originally Posted by 32VALVR View Post
I'm lucky if I get 16 city. But I have a heavy foot, and my boost a pump is usually working hard.
you have a bigger blower (although twin screw is more efficient) and auto trans too. I'd say you're right on par with me all things considered. These cars really are great.
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Old 03-30-2017, 09:40 PM   #6
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Re: a bit hard to believe

Blower = engine more efficient...

I like it...

actually when i put a vortech on my old fox, saw the same thing...until i got into boost...then it was a race between the tach and the gas gauge...
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Old 03-30-2017, 11:17 PM   #7
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Re: a bit hard to believe

that is great that you are getting some good MPG,
I was very happy about getting a diesel truck, because of adding to the MPG to one, but with all the emissions crap they put on the diesel now, its hard to get any good MPG, unless you delete the emissions stuff. The price to delete the emissions stuff is about $3500. They started on the Ford diesels with the 2008 Powerstroke, which mine is a 2009.

Congrates

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Old 04-04-2017, 01:50 PM   #8
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Re: a bit hard to believe

You should also factor in that if you did not have a custom tune before the SC that now you are likely running a more efficient timing and A/F ratio.
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Old 04-04-2017, 02:50 PM   #9
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Quote:
Originally Posted by ASH302 View Post
that is great that you are getting some good MPG,
I was very happy about getting a diesel truck, because of adding to the MPG to one, but with all the emissions crap they put on the diesel now, its hard to get any good MPG, unless you delete the emissions stuff. The price to delete the emissions stuff is about $3500. They started on the Ford diesels with the 2008 Powerstroke, which mine is a 2009.

Congrates

ASh
Just curious, but what would you consider good mpg in a diesel?
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Old 04-04-2017, 03:07 PM   #10
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Re: a bit hard to believe

Can't speak for him (and I wasn't asked but I think I can chime in a little on this) but on my ECSB 2006 Duramax I remember hitting 20mpg with regularity on my commute. Mostly highway for about 30 miles a day. Straight pipe and a tuner, stock sized tires. After yanking the emissions business on my prior 2009 CCLB, did around 19mpg. Not fantastic, but for a vehicle that size, I didn't feel it was terrible.

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Old 04-21-2017, 12:08 AM   #11
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Re: a bit hard to believe

Ran a light foot this tank and got 16.6 mpg 100% city.
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Old 04-21-2017, 10:11 AM   #12
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Quote:
Originally Posted by lastcall190 View Post
Can't speak for him (and I wasn't asked but I think I can chime in a little on this) but on my ECSB 2006 Duramax I remember hitting 20mpg with regularity on my commute. Mostly highway for about 30 miles a day. Straight pipe and a tuner, stock sized tires. After yanking the emissions business on my prior 2009 CCLB, did around 19mpg. Not fantastic, but for a vehicle that size, I didn't feel it was terrible.

-J
I have a 2015 F250 that's stock down to the air filter. For My daily commute I see 13-14. That's with some traffic too. On the highway I average 18-20. I did touch 25 when I went to WA last summer. I'm pretty happy with my MPG.

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Old 04-21-2017, 11:47 AM   #13
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Re: a bit hard to believe

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Originally Posted by 32VALVR View Post
Ran a light foot this tank and got 16.6 mpg 100% city.
That's awesome. With a manual you'd definitely be over 17. Maybe even over 18.
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Old 04-21-2017, 11:48 AM   #14
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Re: a bit hard to believe

Quote:
Originally Posted by SchwermoRacing View Post
You should also factor in that if you did not have a custom tune before the SC that now you are likely running a more efficient timing and A/F ratio.
I was dyno tuned when I was n/a also
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Old 04-22-2017, 12:38 AM   #15
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Re: a bit hard to believe

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That's awesome. With a manual you'd definitely be over 17. Maybe even over 18.
Yeah, in some respects
I miss the manual, mostly down the mountain canyons even somewhat on the way up. But I definitely appreciate the dragstrip bonus plus the no third pedal in L.A. traffic. As far as MPG, its smiles per gallon all the way!
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Old 04-27-2017, 04:06 PM   #16
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Re: a bit hard to believe

16.5 mpg this tank, all city. I fooled around a few times during this tank and went wot. Smiles per gallon is right! I promise I've been smiling!
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Old 04-28-2017, 03:03 AM   #17
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Re: a bit hard to believe

On a recent 250 mile trip part freeway, part curvy 2 lane hiway with mountains, tight curves down to 25mph....then a straight stretch at 65 my wife & I got 48.7 going to the coast & 47.9 coming back. We hit a high of 80mph once or twice and full throttle getting into traffic a few times. Pretty happy with the trip mileage!

In town all stop & go driving it drops down to 35/36 MPG....pretty happy with this ....really short drives in town I can see 26mpg though. Oh wait this was on the 2014 Mazda 3!!! I'm sorry!
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Old 04-28-2017, 11:01 AM   #18
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Re: a bit hard to believe

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Originally Posted by Mustanger2 View Post
On a recent 250 mile trip part freeway, part curvy 2 lane hiway with mountains, tight curves down to 25mph....then a straight stretch at 65 my wife & I got 48.7 going to the coast & 47.9 coming back. We hit a high of 80mph once or twice and full throttle getting into traffic a few times. Pretty happy with the trip mileage!

In town all stop & go driving it drops down to 35/36 MPG....pretty happy with this ....really short drives in town I can see 26mpg though. Oh wait this was on the 2014 Mazda 3!!! I'm sorry!
Lol, I was wondering what car you had, I knew this wasn't a Mustang.
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Old 04-28-2017, 04:42 PM   #19
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Re: a bit hard to believe

Same here mileage stayed the same for me, But when your on it it sure does guzzle gas. 311-420 we need to set up a race lol
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Old 04-28-2017, 05:59 PM   #20
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Re: a bit hard to believe

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Same here mileage stayed the same for me, But when your on it it sure does guzzle gas. 311-420 we need to set up a race lol
All the jokes about going to mexico, you really could. Hahaha

I would jump at the opportunity, but you're way out there brother. If you ever come up this way let me know!
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Old 04-28-2017, 11:29 PM   #21
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Re: a bit hard to believe

15.4 on my last tank, even had some freeway time. I was cruising down the freeway in Tijuana in the fast lane when my right ear hard the obvious sound of an after market twin screw. Two lanes to my right was a 15 up s550 Saleen rowing the gears hard. I joined in and passed him, and we went back an forth for like 5 miles. Was a blast, killed my mpg. But the smiles per gallon were worth it!
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