Fuel Mileage in ye old toilet

[sjwelds]

So the Fuel economy in my 08 EB 4x4 has recently took a major hit, like I'm talking over a mile per gallon less on the last couple of fill-ups. I know we have been doing more idling than normal, what with the recent cold snap and all, but still, this doesn't seem right...

Is winter fuel really that bad? Would it cause this?

What else could/should I look at? Fuel Filter? Do I have one external of the tank?

 

[J Ski]

So the Fuel economy in my 08 EB 4x4 has recently took a major hit, like I'm talking over a mile per gallon less on the last couple of fill-ups. I know we have been doing more idling than normal, what with the recent cold snap and all, but still, this doesn't seem right...

Is winter fuel really that bad? Would it cause this?

What else could/should I look at? Fuel Filter? Do I have one external of the tank?

Check your MAF sensor. If it’s got buildup of gunk on it, it may throw off the MPG reading. I’m having a MPG issue with my 16 ecoboost and I’ve been advised to take them out and clean them. I recently installed a K&N intake system and my MPG have taken a 3-4 mpg hit

 

[JExpedition07]

Guys keep in mind cold weather takes a hit on your MPG too. Mine is significantly lower in the winter.

 

[NevadaGeo]

I have noticed for years that winter-formulated retail gas gives lower MPG.

 

[deweysmith]

It’s not just winter gas, colder air is much more dense, which means there’s more of it to move out of the way. On small cars this isn’t a huge deal but on an Expedition with its big front profile it makes a huge difference.

 

[sjwelds]

Yeah I know on the fuel. Was just not thinking it would make that much difference...

Good point about the denser air...

 

[ExpeditionAndy]

So the Fuel economy in my 08 EB 4x4 has recently took a major hit, like I'm talking over a mile per gallon less on the last couple of fill-ups. I know we have been doing more idling than normal, what with the recent cold snap and all, but still, this doesn't seem right...

Is winter fuel really that bad? Would it cause this?

What else could/should I look at? Fuel Filter? Do I have one external of the tank?

It is pretty common and I experienced that on my 05 and on my 17. It's nothing to worry about, it will get better in the spring.

 

[sjwelds]

Thanks.

Just installed an AEM dryflow performance air filter and sprayed out my maf sensor with CRC mass airflow sensor cleaner. Guess we'll see if mileage ticks back up.

 

[ExplorerTom]

1 whole mpg?

I've tracked every fill up in the 44k miles I've owned mine and I see variations of more than 1 mpg from tank to tank all year round.

Personally, I'd say 1 mpg is within the noise.

 

[J Ski]

1 whole mpg?

I've tracked every fill up in the 44k miles I've owned mine and I see variations of more than 1 mpg from tank to tank all year round.

Personally, I'd say 1 mpg is within the noise.

What would you expect the culprit to be for my 3-4mpg loss after intake installed?