Mpg drop big

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Feb 26, 2016 | 11:51 PM

Hippie90

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Mpg drop big

Hey guys I got a 90 f150 with 302 5 speed. I've had the truck for about 6 months now. I had been getting anywhere from 20-25 mpg in the truck but now it's dropped to 14 15 this past month and have filled up 6 times and checked mileage. I have replaced o2 sensor, air filter, oil and oil filter, coolant sensor, PVC valve, checked all vaccum lines I could and trans fluid and checked tire pressure and still can fix it. I drive 55 always and have not changed routes or habits. Any help would be great this is my main vehicle!!!!!

Feb 27, 2016 | 01:46 AM

timbersteel

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Joined: Mar 2005

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From: Mexico, Missouri

Got dual fuel tanks?

Feb 27, 2016 | 07:29 AM

'89F2urd

Lead Driver

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Did you stop smoking drugs? I'd have to be high as a kite to get 25mpg.

Feb 27, 2016 | 08:21 AM

NotEnoughTrucks2014

Fleet Mechanic

Joined: Mar 2014

Posts: 1,926

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From: Saskatchewan Canada

Quote:

Originally Posted by '89F2urd

Did you stop smoking drugs? I'd have to be high as a kite to get 25mpg.

Not as far off as you might think. Had an 86 with the EFI 5.0 and an SROD that would consistently get over 20 mpg.

Dual tanks and the possibility of fuel transfer is a possibility, but I thought that was still the three pump setup?

Feb 27, 2016 | 08:41 AM

Diesel_Brad

Fleet Owner

Joined: May 2009

Posts: 21,437

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From: Gilbert, PA

Quote:

Originally Posted by '89F2urd

Did you stop smoking drugs? I'd have to be high as a kite to get 25mpg.

LOL I was thinking the same thing

Feb 27, 2016 | 08:46 AM

Conanski

FTE Legend

Joined: Jun 2006

Posts: 31,930

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From: Ottawa, Ontario

Winter gas maybe? Depending where you are that accounts for a solid 10-20% drop in milage.

Feb 27, 2016 | 09:11 AM

Tedster9

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Joined: Apr 2002

Posts: 19,311

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From: Waterloo, Iowa

Quote:

Originally Posted by '89F2urd

Did you stop smoking drugs? I'd have to be high as a kite to get 25mpg.

LOL

that right there's funny, I don't care who ya are

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Feb 27, 2016 | 01:10 PM

westcoasting

Elder User

Joined: May 2013

Posts: 533

Likes: 5

Quote:

Originally Posted by '89F2urd

Did you stop smoking drugs? I'd have to be high as a kite to get 25mpg.

Even then it would be difficult to get 25!! Maybe once I can see happening...

Feb 27, 2016 | 06:58 PM

#10

Conanski

FTE Legend

Joined: Jun 2006

Posts: 31,930

Likes: 1,499

From: Ottawa, Ontario

Quote:

Originally Posted by rla2005

Yes the OP's truck has the three pump setup that uses a dual function reservoir.

My '90 didn't.

Feb 27, 2016 | 09:16 PM

#11

Mudsport96

Logistics Pro

Joined: Aug 2010

Posts: 3,716

Likes: 583

From: Chillicothe

I used to get 18-19 in the summer, but as soon as it drops below 34-40 14 is all she will muster. I think with the wear on it the mileage is going down more but not too worried yet

Feb 28, 2016 | 09:07 AM

#12

rla2005

Fleet Owner

Joined: Oct 2005

Posts: 20,785

Likes: 1,751

From: Kentucky

Quote:

Originally Posted by Conanski

My '90 didn't.

1989.....was the last year.

Oops

Feb 28, 2016 | 10:28 AM

#13

choate

Elder User

Joined: Mar 2014

Posts: 648

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From: St Charles Missouri

Quote:

Originally Posted by '89F2urd

Did you stop smoking drugs? I'd have to be high as a kite to get 25mpg.

Lmao. Maybe he checked it going down a one mile hill in neutral

Feb 29, 2016 | 10:32 PM

#14

Hippie90

Thread Starter

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Joined: Feb 2016

Posts: 2

Likes: 0

Thanks for all the replys!!!!! Just filled up again today I got 20 mpg this week, but it's been warmer this week maybe it was just the cold weather. I asked at my chevron and none of them new anything about there gas...... I use the 93 everytime. I'll try to see how it comes out this week