Is my MPG normal?
FTE Leadership Emeritus
Joined: Jul 2002
Posts: 42,561
Likes: 423
From: Long Island USA
My 99 V10 2wd Crew Cab Dually gets 9-10 mpg empty.
Thats me driving around at 60-65 mpg on the interstate, keeping the RPM's under 2000 as best I can.
I have 3.73 rear axle ratio
running 235/85r16
Cost me about 75$ to run 200 ish miles.
The sticker on the door says that I should be running 215/85R16's, I am not sure if that makes a difference or not.
Oh, I have new cop's, new plugs, new fuel filter. Truck runs like a champ except its a pig on fuel.
13 mpg would simply make my day!
Jerem
Thats me driving around at 60-65 mpg on the interstate, keeping the RPM's under 2000 as best I can.
I have 3.73 rear axle ratio
running 235/85r16
Cost me about 75$ to run 200 ish miles.
The sticker on the door says that I should be running 215/85R16's, I am not sure if that makes a difference or not.
Oh, I have new cop's, new plugs, new fuel filter. Truck runs like a champ except its a pig on fuel.
13 mpg would simply make my day!
Jerem
BUT - you have a dually - those fenders do stick out pretty far and do put up some wind resistance., and the extra tires do increase the rolling resistance.
Like others have said, the tire size is different, so you are actually going further than you think. If you clock 20 miles, and the original tires were 215/85R16, with 235's, that works out to 20.85 miles actual. Not a big difference. At 10MPGs, that works out to 10.43 actual.
I'd clean the MAF, change the fuel filter, check the fuel pressure (28-30 idling, 38-40 under heavy load or with the engine off/key on). If the air filter hasn't been changed recently, do that too. Even when they look clean, they aren't necessarily.
New User
Joined: May 2013
Posts: 14
Likes: 0
My 08 4x4 x cab 250 was getting 14.5 when I got it and now it consistently gets around 10.3. That's me cruising at 60 and taking off like an old person. Something has to be wrong with mine cause I haven't changed anything and I want 14+ back again.
Freshman User
Joined: May 2010
Posts: 25
Likes: 0
From: Tewksbury, MA
I hauled our 9000 lb travel trailer up to the campground yesterday afternoon (we have an '06 CC). It's about a one hour trip and mostly highway. According to my Scan Gauge ave mpg (I'm not sure how accurate it is), we got 7.5 mpg hauling the TT and 13.6 mpg on the way back without the trailer.
FTE Leadership Emeritus
Joined: Sep 2003
Posts: 12,246
Likes: 761
From: Houston, Texas
It probably needs some new Motorcraft plugs if you haven't already done them.
New User
Joined: May 2013
Posts: 14
Likes: 0
Ok should i take it back to the ford dealer or should i attempt it myself? I can change spark plugs done it a bunch of times, but im leary of these aluminum heads, if i screw up its on me, on the other hand if i take it back to the dealer its on them. Or have all these siezing issues been resolved by now?
FTE Leadership Emeritus
Joined: Sep 2003
Posts: 12,246
Likes: 761
From: Houston, Texas
Ok should i take it back to the ford dealer or should i attempt it myself? I can change spark plugs done it a bunch of times, but im leary of these aluminum heads, if i screw up its on me, on the other hand if i take it back to the dealer its on them. Or have all these siezing issues been resolved by now?
I've seen Srmastertech do this on an '04 F150 and here's how he did it:
The theory behind it is that the impact wrench seems to gently tap it loose instead of the instant breaking force of a socket wrench that breaks them off in the head.
Thread
Thread Starter
Forum
Replies
Last Post
