How much does running the A/C cut into your gas milage?
On mine it seems about 1-2 MPG from what I can remeber last summer.


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99 XLT 5.4L Regular Cab 4x2 120" Wheelbase 4 wheel disc brakes/ABS 5 star larait style wheels Toreador Red/Silver 3.55 gears 255/70/16 OWL Delta toolbox, Ford Running Boards, Ventshades, Bugflector, Bullrings, Donnelly compass mirror, 2" Rear drop.
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I think it depends on what size engine too, 54. And the newer engines probably operate with a ac more efficient too. I get 20 with mine on and 22 without it on.

 

Probably only takes off 1-2 mpg, but you cant tell a difference in performance that much. ISnt it true that when you have the AC on, it takes 8 hp from the engine?

 

Where did you hear 8 hp?

 

Maybe a sales man told him!

Actually, it sounds like a reasonable estimate. Probably varies a lot by make and model. Some little cars really suffer a noticeable power loss w/ AC on.

 

I don't know about my truck yet but on my 96 Mustang it droped about 1mpg on the highway with the A/C on I think the truck will do about the same.

 

Pastmaster....

How in the world are you getting 22 mpg? I dont think I could get that pushing the truck to work. You must have a real light foot brother. no offense of course

 

I get 22 mpg in 4.6 ext. cab auto. I got a
3.08 rear end and 255's, though. So I compromise low end off the line for the extra mpg. I dont tow much anyway.

 

I know there aren't any 4x4 out there with the 5.4 that are gettin better than 18. My truck gets 11.5 on average. I'd hate to see what I get while runnin the A/C.

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Patrick aka Mudder Arlington Texas (D/FW), member of the Texas Chapter club DAYLIGHTER edition F150 ®, Black 98 S/S S/C F150 4x4 0RP 5.4 3.55ls, Ramsey Pro 8000 hidden winch, Grizzly roll bar, Superwhite Bulbs, 2 Baja back up lights, 8 165 watt KC Daylighters, 4 chrome, 4 black (I come alive at night), Manik grille guard, Westin step bars, Rhino Taillight guards (thanks Pony), Magnum bug shield, Sonic aluminum treadplate 36" tool box, Flowmaster 40 series dual exhaust, Airaid High Flow system, Edelbrock IAS shocks, 265/75/16 BFG AT/S, American Racing Baja wheels, Cobra CB radio with 3' whip antenna, Escort Laser/Radar detector, Nokia cell phone, a Mobil Speed Pass on the back window, a F150 Online sticker, and a DAYLIGHTER sticker on the front windshield, and yes, I also have been infected with the infamous door crack. More to come for the Daylighting machine: JBA headers, BFG 285's, and a Lighted Ford tailgate logo. If you would like to see pics, email me at mudder46@hotmail.com or see pics at me and pony's website www.angelfire.com/ok3/ponysix8 , and to hear the Flowmaster exhaust http://www.angelfire.com/ok3/ponysix8/images/T005.wav
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[This message has been edited by mudder (edited 03-21-2000).]

 

mudder, your mileage sounds about like mine. I use the A/C a lot though. Noticed your tires are the same size as mine. Is your speedometer or odometer calibrated for them? My OEM tires were apparently 235/70/16. The odometer error probably causes mpg calculation errors.

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White 97 XLT SC 4.6, 4X4, 3.55ls, door cracks, tow pkg, long bed, Rhino liner, Owens running boards

 

MOVEOVER,

My speedometer should be fine, all I did was replace the factory 265/70/17's with the 265/75/16's. They are almost the exact same size, so I think that would be fine. But here in about a month I'm goin to put on some 285's, so I know it will be off then. But I plan on gettin it recalibrated as soon as I get the tires.

 

Mudder....I've gotten over 18 quite a few times with my 00 4x4 SC/SB 5.4. enough time that I know I'm figuring the mileage right and that it is repeatable. Highway...tires at max pressure and carefull not to go over 70 mph. It can be done.

I do not seem to notice a difference with the air on. I actually think on the highway I get better with the air on.....to much drag with the windows open.

-jeff b.

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2000 F150 4x4 SC/SB 5.4 ORP Lariet Oxford White with Harvest Gold 2 tone.




[This message has been edited by FarmBoy (edited 04-11-2000).]

 

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2000 F150 XLT 4x4 Short Bed. Amazon Green, 5.4L, SuperCab, ORP, Tow Package, Sliding Rear Window, Electronic Shift, Keyless Entry, In-Dash CD, LT265-70-17 Tires.

1994 SVT Mustang Cobra. #1032 of 6009. Black coupe with black leather int., 3.73 rear, Bassani Exhaust, Aluminum D/S, Bridgestone RE-71 255-45-ZR17

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[This message has been edited by 2000 F150 4x4 (edited 12-06-2000).]