What MPG are you getting?

No - I get that placebo component but Not my first rodeo:). Hence the reason for using 4 fill ups before and after. I have had prior success in older platforms running older style gearboxes so not sure if this will net a measurable difference. Time will tell.
 
@JustDandee Im siding with "The observer effect" as well, Jeep is simply not the platform that allows to add little bit here and there into something meaningful from efficiency stand point.
If you were referring to some aerodynamic high efficiency 3cyl sedan, sure no argument, you will even be able to observe temperature changes from one oil to another. But with Jeep, wind blows in wrong directions and there goes 3mpg from your efficiency along with all the tracking you did down the shitter.
 
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eastbloc said:
@JustDandee Im siding with "The observer effect" as well, Jeep is simply not the platform that allows to add little bit here and there into something meaningful from efficiency stand point.
If you were referring to some aerodynamic high efficiency 3cyl sedan, sure no argument, you will even be able to observe temperature changes from one oil to another. But with Jeep, wind blows in wrong directions and there goes 3mpg from your efficiency along with all the tracking you did down the shitter.
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Skeptical? No I get it, I took a route that I have driven with several vehicles with a long down hill grade. My 2013 F150 will get up to 70-75 coasting down it- the TJ I had to keep in gear with a touch of throttle to hold 65- similar to my square body only a little worse. But I also did take a CJ7 with a 2.5 four banger, lifted 32" Maxi Bighorns (e load) and winch bumper that could not even do 55 mph when I bought it... a little bit here and a little bit there I could do 74 mph down the freeway (all GPS verified MPH) This $220 oil change is just one of the bits I did(truth be told is a quality oil change was in order anyways)- call me optimistic but I view myself as a realist- I will wait till I get through a few more fill-ups and see if the rolling average improves.
 
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JustDandee said:
Skeptical? No I get it, I took a route that I have driven with several vehicles with a long down hill grade. My 2013 F150 will get up to 70-75 coasting down it- the TJ I had to keep in gear with a touch of throttle to hold 65- similar to my square body only a little worse. But I also did take a CJ7 with a 2.5 four banger, lifted 32" Maxi Bighorns (e load) and winch bumper that could not even do 55 mph when I bought it... a little bit here and a little bit there I could do 74 mph down the freeway (all GPS verified MPH) This $220 oil change is just one of the bits I did(truth be told is a quality oil change was in order anyways)- call me optimistic but I view myself as a realist- I will wait till I get through a few more fill-ups and see if the rolling average improves.
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Switching to 0W20 will realistically give you real realistically expected results in rolling average. More power to you though, wish you consistency in your data gathering and don' forget to report back with your findings.
 
JustDandee said:
Skeptical? No I get it, I took a route that I have driven with several vehicles with a long down hill grade. My 2013 F150 will get up to 70-75 coasting down it- the TJ I had to keep in gear with a touch of throttle to hold 65- similar to my square body only a little worse. But I also did take a CJ7 with a 2.5 four banger, lifted 32" Maxi Bighorns (e load) and winch bumper that could not even do 55 mph when I bought it... a little bit here and a little bit there I could do 74 mph down the freeway (all GPS verified MPH) This $220 oil change is just one of the bits I did(truth be told is a quality oil change was in order anyways)- call me optimistic but I view myself as a realist- I will wait till I get through a few more fill-ups and see if the rolling average improves.
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How long until you get $220 worth of free gas?

I’m gonna side with the observer effect as well. Easy to light foot it if you want to see a good result after making a change. That and unless you used noticeably thinner fluid in every application, just plain synthetic in the same viscosity won’t hardly yield any results. Even if you went from 10w-30 conventional to 0w-20 synthetic, it’s maybe 1mpg at the most that you would gain and 1 mpg is not really accurately measured unless over many tanks.

Even if you did gain 1-2 mpg, you’ve got about a decade or more until that pays off, and by then I expect you’ll have spent another $220 on more fluid multiple times.
 
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JustDandee said:
Just sharing that I am tracking some attempts to improve mpg on my Jeep. Just did a expensive oil change in every rotating assembly to a high quality synthetic. Tracked the first 4 fill-ups before and will track the next 4. First tank looks encouraging but I will post more details after tank 4.
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Hey I'm all for it! Been doing what I can as my commute is 56 miles/day. So far keeping speed down & staying around 2000 rpm (other than highway merging) seems to do the best. 19 mpg is the best I've been able to get. Thats hitting very little traffic, timing red lights, drifting up to a light or stop sign in neutral. Our gas is back up to $5/gal so every little thing helps right now.
 
machoheadgames said:
Even if you did gain 1-2 mpg, you’ve got about a decade or more until that pays off, and by then I expect you’ll have spent another $220 on more fluid multiple times.
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Well I don’t know what y’all spend to change Two diffs, x case, tranny and engine oil- but I hope you all are doing your routine service. The ROi is not restricted on mpg, (2 mpg would be almost $10 a tank savings though) but also longer range when out on the trail, -a smoother shifting transmission. Longevity of the components. ....So you are only talking the delta between cost of Dino oil and a quality synthetic. And if you know anything about oil- everyone thinks engine but seldom changed oils like differentials and transmissions are where synthetics shine. Uniformity of the carbon molecules is what gives you longer change intervals and less friction loss. But I say again... let’s see in a couple of weeks if it just snake oil.
 
HandOverFist said:
You are giving scenario's that are not even in the realm of this thread. Yes, we understand a foot buried in the throttle is a net loss.

A 2002 Jeep Wrangler 4.0 was advertised at 13 City/16 Hwy when they were produced...they didn't just pull that out of a hat. Like I stated earlier, if there is a specific reason one needs lower gears (ie heavy loads, bigger wheels, extreme terrain) that is fine, but it is ridiculous to make a blanket statement that lower gearing is going to equate to more mpg. Not going to happen in the real world as we know it.
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Wrong again. I illustrated that it’s not exactly an rpm issue. Obviously you feel injured by my comment. So, why not 2.21 gears. Super low rpm would give the best mileage ever, right?
A given rpm is a byproduct of engine speed and gear ratios, including tire size. What’s harder to calculate are parasitic losses through all of the rotating assemblies, environmental losses, density altitude, grains of water, etc. chasing a lower rpm in search of better mileage isn’t looking in the right direction
 
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Old Pueblo said:
Wrong again. I illustrated that it’s not exactly an rpm issue. Obviously you feel injured by my comment. So, why not 2.21 gears. Super low rpm would give the best mileage ever, right?
You’re defending your incorrect position vigorously, but your still fucking wrong.
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And you are a fucking nitwit. I suppose my 16.8mpg with 3.73 gears was pulled out of someone's ass? Leave it to you to go off on a extreme tangent. Btw, nothing about you could ever injure me lol.
 
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HandOverFist said:
And you are a fucking nitwit. I suppose my 16.8mpg with 3.73 gears was pulled out of someone's ass? Leave it to you to go off on a extreme tangent. Btw, nothing about you could ever injure me lol.
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You’re still wrong. Too weak of character to admit it. Rpm is a causality, not an effect
 
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