knightsfs4
New member
I have a 06 limited v8 4.7. When I get it 6 months ago I was getting around 17.5 mpg. Now i'm getting 17ish. How can I make this number higher?
Jack
Jack
How to increase gas mileage?
- Thread starter knightsfs4
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I second this. In fact, I made a 2-hour trip to PA from MD a few weeks ago, going 55-65 mph, no AC, windows down, with only these exact mods in my v6. The computer hit 29 mpg at one point, but ended up at around 28.5. I think this is a little high and is probably more like 25 or 26. Needless to say, my jaw dropped when I saw the computer was at 29 mpg, though! :wow2:
These are not typical numbers - normally I get about 24-25 mpg on the computer readout for highway driving, which ends up being about 22-23 when hand-calculated.
I can't, however, give any experience with these mods on a v8.
Snesley Wipes
New member
Light acceleration helps, keep your highway speeds 55-70, and try to avoid braking unless you have to. Also, try to keep your gas consistent. I have found that filling up with Conoco 87 vs others has yielded me +1 mpg pretty consistently and I average a solid 18 mpg every time. Yesterday on my flll-up I calculated 18.6 so that works too. The little things will add up.
Lineman
New member
I'd say get a new air filter or K&N for improvement. Are you running synthetic oil?
But, on a serious note. You bought a full time 4wd V8,
17ish is great
But, on a serious note. You bought a full time 4wd V8,
17ish is great
knightsfs4
New member
I think I'm gonna go with K&N. But which parts do I need to get for best performance? Theres the air filter, aircharger, oil filter, and 77 kit.
Thanks
Jack
Thanks
Jack
krupnation
New member
Jerrydog, just curious, how long have you had the K&N drop-in in your rig? Any issues? I ask because I put one in my old 3rd gen runner and about 3-4 months later it threw a CEL and it turned out to be the MAF sensor. The K&N was "leaking" a little bit of the oil on the sensor causing it to throw a CEL. It didn't damage anything, all I did was take it out and replace with an OEM air filter and cleaned the MAF sensor good.
I, like a lot of V8 owners, are always looking for ways to improve fuel economy. However, it's so dang difficult when you hear that V8 growl by punching it
gas
seafoam it, get new plugs, HCF delete, i think the K&N is useless unless you get a ram air system.
+1 on tire pressure check and i think an oft overlooked point is driving style.
being efficient in the city is not hard, i try to keep my rpms under 1500 when starting from stops and gas down hills and coast up them. plus the lazy fattys with the a/c on crank doesnt help either, if im in the city, my windows are down. if im on the highway i MIGHT turn on the ac, but its more likely ill drop the back and push the sunroof.
my mileage is at 21.5 at 33mph avg. this is over the last 1K miles since my oil change
seafoam it, get new plugs, HCF delete, i think the K&N is useless unless you get a ram air system.
+1 on tire pressure check and i think an oft overlooked point is driving style.
being efficient in the city is not hard, i try to keep my rpms under 1500 when starting from stops and gas down hills and coast up them. plus the lazy fattys with the a/c on crank doesnt help either, if im in the city, my windows are down. if im on the highway i MIGHT turn on the ac, but its more likely ill drop the back and push the sunroof.
my mileage is at 21.5 at 33mph avg. this is over the last 1K miles since my oil change
knightsfs4
New member
How do you seafoam it? Do you mean spark plugs? Also what is HCF delete?
Jack
Jack
knightsfs4
New member
GUYS!!! which one is the k&n drop in kit?
810moto
New member
Nuke
New member
For the most part, any mod you spend $$ on to improve gas mileage has either ZERO payback or the payback will take years. If you're that worried about your fuel costs, then you'll probably do better packing a lunch instead of buying those Happy Meals, brewing your own coffee instead of buying Starbucks, drink water instead of soda, yada-yada-yada, and put that savings towards your fuel budget.
Sorry, guys, but the entire "improving gas mileage" debate is virtually useless beyond 1-2 MPG. Improve your driving habits and keep your vehicle maintained. And since the fuel you buy, even from the same gas station, could have a varying ethanol content from 0 to over the stated 10%, trying to determine your REAL AVERAGE fuel mileage change due to a mod is nearly impossible. You'd need to buy about 500 gallons of the same fuel and THEN do your "experiment".
Sorry, guys, but the entire "improving gas mileage" debate is virtually useless beyond 1-2 MPG. Improve your driving habits and keep your vehicle maintained. And since the fuel you buy, even from the same gas station, could have a varying ethanol content from 0 to over the stated 10%, trying to determine your REAL AVERAGE fuel mileage change due to a mod is nearly impossible. You'd need to buy about 500 gallons of the same fuel and THEN do your "experiment".
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gas
forum search seafoam. itll give you the rundown of the product and how to effectively utilize it. best part, its 10 bucks a can. legit
HCF is hydro-carbon filter delete. its a filter in the air system that is like trying to push outside air through a brick in an effort to get all t4r's up to CA emission standards. spark plugs after seafoam. do it.
i also agree with slow driving. never pop 2k rpms on the highway.
forum search seafoam. itll give you the rundown of the product and how to effectively utilize it. best part, its 10 bucks a can. legit
HCF is hydro-carbon filter delete. its a filter in the air system that is like trying to push outside air through a brick in an effort to get all t4r's up to CA emission standards. spark plugs after seafoam. do it.
i also agree with slow driving. never pop 2k rpms on the highway.
CookieRoe
Senior Member
To be fair:
K&N filter - $40
MPG savings - 1 mpg
20 gallon tank = 20 miles extra (or a little over 1 gallon of gas)
1 gallon of gas = $3.70 *11 = $40.70
It pays for itself after 11 fill-ups (which is approximately 3500-4000 miles, about 3-4 months worth of driving - based on average of 12k/year), with the conservative 1 mpg improvement estimate. Not to mention, it may also give a bit of a horsepower increase - valuable for other reasons.
Not to mention, removing the HCF is free and many have reported a small mpg increase as well. This is only about 10 minutes of one's time, which is pretty easy to make up in savings on gas expenditures.
I do think, though, that if one is really looking to save money, one should also be more than willing to employ the other techniques you suggested. I merely want to point out that you can't be so quick to make a general claim (and yes, I do know you said "most mods," but presumably you have read the earlier responses and are, in part, responding to those people). 1-2 mpg is actually quite significant depending on how much you value a few extra dollars in your pocket per tank of gas.
Let's not even get started on the savings from converting one's motor to run on old vegetable oil :lol:
BlackWorksInc
New member
I still don't buy the HFC mod, in all the posts in that thread there is still no Dyno comparison, flow test, or anything but the owner's butt dyno. I just don't see that HFC creating that much of an improvement with such little data... Don't get me started on "High Flow" filters, that debate is a long one as well.
As stated earlier, any mpg gain below about 3 mpg us just not going to be cost effective and probably end up either as a debt or harm the engine.
