After first tank.(good mpg) then tune up (bad mpg)? What plugs did you go with

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1999 331 stroker EFI Ranger (daily) gt40 explorer complete swap

Go to the same gas stations over and over. I get 29 in my 2.3 standard with pilot/shell and 25.5 with murphy/valero

Run it a but longer and see if it comes up. 15 towing and 16 in the cold are both fairly normal, its possible the 12.5 was just crappy gas.

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1998 Ranger XLT, Ext Cab - SOLD
1999 F150 XLT, Supercab, Longbed

+1, and it is winter so the gas in the tank is the special winter blend that affects m.p.g.

It shouldn't be that big of a difference in mileage unless it is a huge coincidence. My old 04 4*4 got almost identical mileage regardless of where I filled-up, and I kept track for 3-4 months with an approved D.O.T. ledger. I fueled at BP, Shell, Sunoco, and Citgo (before they were rebranded Valero). I marked in my book to the hundred's/thousand's how much money the vehicle took, gallons used, and mileage. I then ran a spreadsheet, and I was surprised that eventhough I travel mostly highway, I still averaged 19.5 miles to the gallon. I'm also a lightfoot and rarely travel more than 5 over the speed limit. Also, my vehicle was newer (less than 45K miles), and I properly aired the tires. The main problem with computing fuel economy is consistency. Even our owner's manual says to fill-up at the same station, facing the same direction, at the same time of day, etc. However, that is not possible since there are variations in the gas (how old, when manufactured, etc.), variations in temperature/humidity, and the biggest difference is individual driving habits. Also, two individuals do not drive in the same exact manner. Last, city-traffic messes with fuel economy because of the constant stop-and-go, so if a driver experiences a lot of traffic, bad weather, etc. the accuracy of the mileage isn't taken into account.

geeze. My 4.0 gets like 18-20 roughly. I think its very efficent for what it is

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95 xlt 4.0 5spd with a two tone paint job, blue cab and a black box

my truck gets 13 city and 18-20 highway...its a truck not economy car

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2021 F150 5.0 Screw

Past:18 F150 2.7, 16 F150 5.0, 14 F150 5.0, 07 F150 5.4, 03 Ranger 4.0

Master Certified Ford Parts / Warranty Admin

DJ, your truck gets 30 MPC (miles per cleaning)

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2001 Ranger Edge 4x4 (sold)
2006 F150 Lariat 4x4 (sold)
2007 Explorer XLT (Destroyed by Deer on highway)
2014 Explorer XLT (inherited from parents)

The only time I see anyone brag about good gas milege is when they post a ad for sale. everyone says great on gas, hahaha...

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Base 94Ranger , short bed, 2.3, 5 speed, Glasspack muffler,298,000 miles, 2 wheel drive.