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Gas milage 6cylinders

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Old 10-29-2010, 06:45 AM
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Dr bowtie, did you get an engine code when replacing the 190 degree thermostat with a 160?
Old 10-29-2010, 06:49 AM
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hes got an the 4.9 Inline 6... i dont beleive it would throw a code though ...

did you ever get that f150 of yours going
Old 10-29-2010, 07:07 AM
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Thetruck, I'm driving an 06, 4.2 and OD auto tranny.

Bobkyle, I finally got the truck going without further problems (he sez with crossed fingers). I like the way she tows my boat & trailer. Significantly better than the GMC 350 on steep hills (there's some pretty steep hills here). What do you think of the changes listed in dr bowtie's post (post #12). With changes, he sez he went from 13 to 23. Don't know about that 160 degree thermostat, but I am pretty sure the MSD box boosts mileage. I once read the higher operating temps is an anti pollution thing. My GMC came with a 195 T stat, but I ran a 180 in it for years with no problems.
Old 10-29-2010, 12:56 PM
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bowtie has an older model truck with the Inline 6..

ya man both of my 4.2 are champs at pulling..
Old 10-29-2010, 10:10 PM
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Default 6 vs 8

I've been reading these posts and am somewhat surprised at the figures I'm seeing. Some of you guys are getting V8 mileage with a 6 ??? Wonder why (other than lifts). Are many of you running 4 speeds? Maybe it's the extra gears as my 2010 4.6 3 valve 6 speed is doing as good or better than many here. Not bragging, just sayin'. Makes we wonder how the next-gen sixes will do with the introduction of the 3.5 and 3.7 in the 2011's. Haven't seen any EPA ratings, but I'll bet they'll be great. The EB makes some serious power.
Old 10-29-2010, 10:47 PM
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FoMoCo, if I knew the answer to your question, I would have enough knowledge to resolve my poor gas mileage issue. Do you have the knowledge? If yes, will you share?

You want to bet that the new engines get a lot better gas mileage? Ha! You cannot go by the posted mileage on the sticker. It's just a lie and always has been. In my experience you can bet that the actual mileage will be 20+ percent less than the sticker claim. Fines should be assessed for publishing such lies.
Old 10-29-2010, 11:57 PM
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Default 03 f150 4x2 4.2 5-speed

mileage typically 17-20 mpg...drivin...g like a grandpa...
Old 10-30-2010, 02:13 AM
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Originally Posted by FoMoFun
I've been reading these posts and am somewhat surprised at the figures I'm seeing. Some of you guys are getting V8 mileage with a 6 ??? Wonder why (other than lifts). Are many of you running 4 speeds? Maybe it's the extra gears as my 2010 4.6 3 valve 6 speed is doing as good or better than many here. Not bragging, just sayin'. Makes we wonder how the next-gen sixes will do with the introduction of the 3.5 and 3.7 in the 2011's. Haven't seen any EPA ratings, but I'll bet they'll be great. The EB makes some serious power.

Like i stated before, I'm averaging 17 combined driving, I thought it was pretty good considering Its got a lift and 185/75/16 mt...Is there a v8 mpg thread? i looked but could not find.
Old 10-30-2010, 02:38 PM
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thetruck--with a lift, that's doing good. jonquil--I think with the new EPA changes, the stickers are more indicative of actual gas mileage than they used to be. My sticker said 15/21, which has proven to be very accurate. I don't do a lot of stop and go, even in town, so it's pretty easy for me to get 18.5 to 19 average without the air on. A/C sucks another 1 mpg. On the highway, over 20 is easy to get providing I keep speeds at 70 or below. I'm doing better than my wife's Ridgeline (comparing to when I used to drive it-she's a leadfoot) and my 06 Acura MDX. Both of those have 3.5 V-6 power plants. Also I see a lot of variance in identical models. Some Honda guys are only getting 13 and are driving like granny........wonder why as Honda tells them "It's normal".
Old 11-01-2010, 12:18 AM
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haha i usually get around 14 latly.... but the other day i pulled my boat to the camp and got 15.5 pullin a boat....3 people in the truck...loaded with all kinds of camping stuff..coolers ..tools.....and ive got an 18foot boat...i couldnt belevei it got 15.5 ... i got 3.73s ls locker... with 265.75.17 buckshots ...with my v6.....


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