Thread: Getting pissed about mpg in 5.0

Like I said, I've heard mixed results.

I use 91 chevron and get about 340 360 in city with my 5.4l aftermarket tires no lift

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Over 400 highway too k&n flow master oh flex fuel too !!!f150 2010!

Originally Posted by Raptor05121

OP, I would take off the K&N and do a controlled run with it and one without it. I cannot imagine an intake would make much of a difference, but it wouldn't hurt to check and see.

Secondly, how many miles do you have on your truck? Is it past break-in? The first 5,000 miles you should be varying the engine speed and break in the piston rings. The engine also helps by holding open loop for longer and running its stoichiometry at a higher percentage (thus lower mileage) until it is properly broken it.

Don't bother with any fuel injector cleaner. You'll risk ruining something more than it will helping. Shell and BP gasoline have been proven to keep an engine cleaner than one with cheap fuel and fuel detergents.

New engines have a coating on the inside of the throttle body and intake manifold, so it is advised to take it to the dealer and have them use their BG vacuum system to safety remove contaminates. BUT, given the fact his truck is too new to accumulate any carbon buildup, I would give it at least a year or two before you worry about it.

Why are you using 91 octane? Your truck calls for 87....

His truck is a 2011 and he bought it used lol. That's why I said try cleaning those and using the fuel system cleaner. His engine is definitely past break-in lol. I was, however, unaware of the coating on the tb and intake manifold.

I also have 2011 screw 5.0. I understand why you would be pissed, I'm getting closer to 20 mpg stock. Maybe that's the problem. I've read that the 2011 and up changed some things to improve mileage without losing power. If you have k&n oiled filter you may have oil and dirt on your maf sensor.

Originally Posted by lumaro443

I also have 2011 screw 5.0. I understand why you would be pissed, I'm getting closer to 20 mpg stock. Maybe that's the problem. I've read that the 2011 and up changed some things to improve mileage without losing power. If you have k&n oiled filter you may have oil and dirt on your maf sensor.

Just pointing out that 2011 was the first year for the new engines lol.

Originally Posted by lumaro443

I also have 2011 screw 5.0. I understand why you would be pissed, I'm getting closer to 20 mpg stock. Maybe that's the problem. I've read that the 2011 and up changed some things to improve mileage without losing power. If you have k&n oiled filter you may have oil and dirt on your maf sensor.

Yeah. Engines lol

5Star tuned.....

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If I did the speed limit. I'd prob get 30 mpg lol

5Star tuned.....

Originally Posted by Jersey_Joe

Yeah. Engines lol

5Star tuned.....

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If I did the speed limit. I'd prob get 30 mpg lol

5Star tuned.....

See more power means more mileage! Lol jk if only that was always true.

I do part city and highway driving and the pick below shows what I'm getting in my 14 with the 50



I looking to CAI for mine, but I would like to find a RAK so I'm not pull heat in from the engine compartment.

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Originally Posted by Bullet Tooth Tony

I do part city and highway driving and the pick below shows what I'm getting in my 14 with the 50



I looking to CAI for mine, but I would like to find a RAK so I'm not pull heat in from the engine compartment.

Sorry for the lop sided photo