For more than the past 30 days I've been running the same 2 routes:
Yucca Mountain to Ft Calhoun hauling 56,000 pounds of cargo
Ft Calhoun back to Yucca Mountain hauling 56,000 pounds of cargo

Before I had performed an overhaul on my truck I would be able to complete this roundtrip and still have about 50 gallons of fuel left over. Now, after doing the overhaul, I can no longer make the 2700 mile roundtrip without having to refuel at some point during the trip. The "Truck Details" screen shows the same 11.38 MPG as before the overhaul, but my actual gas consumption has increased over 20% during game play.

It's almost as if after doing the overhaul I no longer receive the bonuses from the air filter, Fuel Filter, and Fuel Injector.

has the time ran out on your upgrades i just noticed on mine they say good until a certain date you might wanna check those dates other than that i have no idea interested to know though

The fuel mileage on your "view my driver screen" is when you are hauling 40,000lbs with perfect conditions.

The mpg on your Route Dashboard is your true mpg...maybe you have been getting a lot of tail winds, or maybe some other things that can make it go down...but that is what I'm guessing.

Nope, upgrades are all up-to-date.

I've made this exact same roundtrip over 30 times previously, and NOT ONCE did I ever run out, or come close to running out, of fuel. I've been doing the exact same route since I hit a DR of 50 about 2 months ago.

My current fuel economy for this trip is 9.24mpg based on using 79 gallons to go 730 miles. On a clear and calm leg at 65mph I got 9.1 MPG.

Before the overhaul I was consistently at 10mpg or better for every trip, so what gives?

Also, my MPG on the driver screen has now gone down to 11.21 from the 11.38 it's been at for quite some time. :angry:

What shop did your overhaul? Maybe they didn't do something right. You might want to take it back and see if they can find the problem. Just my 2 cents :)

You're kidding, right? <_<

Have you had your truck since before the latest upgrades? Some of the earlier trucks had much better numbers, then got downgraded. The old trucks were grandfathered in, but maybe that has been changed?

Date Purchased: 4/30/2008
Year: 2009
Make: Peterbilt
Model: 386
Odometer: 186,533 Miles

Weird. I have all the upgrades and I have an "advertised MPG" of 12.41 MPG.

The only thing I can think of is that you are getting a string of headwinds. Right now, I'm hauling more than you are, I have the exact same truck, and I'm getting over 10 "actual MPG"

I'm not getting many headwinds, that's why I cannot understand it.

Even with tailwinds I'm only getting in the upper 9's MPG.

Moderate tailwind @ 65MPH = 9.66 MPG
Clear and calm @ 65MPH = 9.06 MPG
Slight headwind @ 65MPH = 8.68 MPG

Current fuel economy for this trip = 8.99 MPG based on 102 gallons used to go 917 miles.

And all of this has only happened since the overhaul so I know that has to be the reason. I'm almost considering selling my fuel components and rebuying them to see if that fixes the problem.

With the higher weight, you'll consistently stay in the mid 8's to high 9's, unless you get significant tailwind. As your truck deteriorates, your MPG will drop gradually as well. That is why if you have a RMF, your MPG drops dramatically. The absolute best MPG you'll get is when you're dead-heading with significant tailwind just after repairing. I've gotten as high as 17-18 MPG.

Keep in mind that the MPG listed on your dash is not average MPG, it is simply what you earned last turn.

What was the overall max condition of your truck when you overhauled?

But he has been hauling 56,000 lbs for at least 30 Days

The 386 has a load limit of 72,800 lbs. It can easily hit 90% and still haul 56,000 lbs. Probably even 85-80%.

Then again, he would've seen an increase, not a decrease in his fuel economy. Personally, I don't even use the overhaul feature. I never let my truck get below 100%. Once it does, I just sell it and get a new one.

Thank you Jefffan24.

For the past 2 MONTHS I've been running the same vehicle, same condition, same route, same purchased items, and got about the same mileage for the 60+ times I ran the route between Yucca Mountain and Ft. Calhoun. From the time I performed the overhaul my mileage has decresed about 20%. 20% is about how much of a bonus you recieve from the Fuel injectors, fuel filter, and air filter together. This leads me to believe since performing an overhaul, I lost the bonuses from those items.

I never let my truck get below 100% current max condition.
Once I hit 97% max condition I overhauled.
I also repair my truck everytime I complete the 2700 mile rountrip from Yucca to Ft Cal and back so my condition is never poor.

Okay, I see where you're getting confused.

The 11.38 MPG you see on the "truck details" screen is your MPG you would get if you were hauling 40,000 lbs @ 55 MPH (I might be wrong about the 55 MPH, but I know it is dependent on weight.)

Even running 56,000 lbs, you won't get that kind of mileage, especially since you are averaging 71 MPH per turn.

You've always been getting the same mileage, you're just looking at 2 different numbers.

Edit: You're pulling more than the default weight, going faster than the default speed. Of course you're going to see a drop in fuel economy. Up until this point, you've been basing your fuel economy off the wrong numbers

Dude, you're not getting it. I'm not talking about the difference between the truck details page and the route dashboard page in terms of MPG. I'm talking about actual amounts of fuel used for the trip.

Before the Overhaul:
Every roundtrip from Yucca Mountain to Ft. Calhoun I used about 250 gallons.

After the Overhaul:
I now use about 300 gallons to complete the same trip.

Why am I using 50 more gallons of fuel per trip since I did the overhaul?
Everything, including the way I drive, is the same as before the overhaul

When did you buy your items?

LOL...Seriously dude, you're killing me.
EVERYTHING is the same as before the overhaul, except now I get less MPG/use more fuel.

I have been driving the exact same routes and cargo weight for two months. (30+ roundtrips)
I have the same truck.
I have all the same items and have had them the entire time.
I drive exactly the same way. (+5mph over the speed limit, 10% over the weather speed)
I start my roundtrip routes at 100% current condition everytime.
I would use about 250 gallons of fuel to make the 2700 mile round trip.
One week ago I got an overhaul and now I use 300+ gallons of fuel to make the 2700 mile round trip.


The best way to figure out if there is actually a glitch is to actually see how the MPG is calculated in the game and compare what I should be getting to what I am getting. However, I have never seen the formula for this posted anywhere.

The other way to figure out if there is actually a glitch is to compare other drivers MPG under the exact same conditions.

To do that I'll need info from drivers of this exact truck, with the same items, hauling the same weight. I'll need to know their speed, weather conditions, MPG, and truck condition.

Since there hasn't been a post from Admin or another person of power I may just sell and repurchase all of my fuel bonus items tomorrow and post the results.

I'm trying to help, trying to think of things maybe you haven't thought of. Chill out.

I'll buy a new truck, new everything and run a 56,000 load from FC to YM and see what you would get with new everything.

lol sorry, I wasn't trying to be a jerk but I was just getting frustrated from all the questions because when I meant everything was the same, I really meant everything.

I'm going to sell and repurchase the fuel related items today or tomorrow to see if that solves it. If it does, then there's definitely a glitch.

Also, you don't need to run from YM to FC. If you just run 56,000 from anywhere let me know your speed, weather, condition, and MPG and that will tell me what I need to know. Thanks!

Started Run with brand new everything, 100% condition and 300 gallons of fuel and 56,000 lbs of Nuke Waste.

First Leg: 70 MPH (5 over the limit) Clear and Calm. Used 7 gallons fuel (293). Current MPG 10 MPG. Current Truck condition 100%.

Second Leg: 70 MPH, Moderate Headwind. Used 8 gallons of fuel (285). Current MPG 9.33 MPG. Current Truck condition 99.7%

Third Leg: 65 MPH. Significant tailwind. Used 7 gallons of fuel (278). Current MPG 9.318 MPG. Current Truck condition 99.4%

Fourth Leg: 75 MPH. Moderate tailwind. Used 6 gallons of fuel (271). Current MPG 9.65 MPG. Current Truck condition 99.3%

Fifth Leg: 65 MPH. Clear and Calm. Used 7 gallons of fuel (264). Current MPG 9.583. Current Truck condition 99.3%

Sixth Leg: 75 MPH. Clear and Calm. Used 9 gallons of fuel (255). Current MPG 9.33
Current Truck condition 99%

Seventh Leg: 60MPH. Freezing Rain. Used 6 gallons of fuel (249). Current MPG 9.41
Current Truck condition 98.7%

Eighth Leg: 70 MPH. Slight Headwind. Used 8 gallons of fuel (241). Current MPG 9.32
Current Truck condition 98.5%

Ninth Leg: 70 MPH. Moderate Tailwind. Used 7 gallons of fuel (234). Current MPG 9.39 Current Truck condition 98.3%

Tenth Leg: 85 MPH. Significant Headwind. Used 11 gallons of fuel (223). Current MPG 9.155 Current Truck condition 98.2%

Eleventh Leg: 65 MPH. Significant Tailwind. Used 6 gallons of fuel (217). Current MPG 9.277 Current Truck condition 98.1%

Twelfth Leg: 60 MPH. Slight Tailwind. Used 6 gallons of fuel (211). Current MPG 9.32 Current Truck condition 97.8%

Thirteenth Leg: 70 MPH. Moderate Headwind. Used 8 gallons of fuel (203). Current MPG 9.27 Current Truck condition 97.7%

Fourteenth Leg: 75 MPG. Light Rain. Used 9 gallons of fuel (194). Current MPG 9.19
Current Truck condition 97.5%

Fifteenth Leg: 65 MPH. Heavy Rain. Used 7 gallons of fuel (187). Current MPG 9.203
Current Truck condition 97.2%

Sixteenth Leg: 80 MPH. Slight Headwind. Used 9 gallons of fuel (178). Current MPG 9.18 Current Truck condition 97%

Seventeenth Leg: 76 MPH. Light Rain. Used 9 gallons of fuel (169). Current MPG 9.129 Current Truck condition 96.8%

Eighteenth Leg: 85 MPH. Significant Headwind. Used 9 gallons of fuel (160). Current MPG 9.02 Current Truck condition 96.5%

Nineteenth Leg: 68 MPH. Moderate Headwind. Used 10 gallons of fuel (150). Final MPG for the trip: 8.99 Current Truck condition 96.4%


I ended up getting just below 9 MPG on a brand new truck with new everything (other than the driver items). I had 7 legs with headwind, 4 legs with some type of rain, 5 legs with tailwind, and 3 legs of clear and calm. I contribute the lower MPG to the conditions, but it wouldn't have saved me 20 gallons of fuel

Um, why don't you just buy a EXTRA FUEL TANK??

He has all pertinent upgrades

I bought all new fuel items and there was no change in MPG for me.

TT, looking through your trip legs I don't see a true pattern. It's almost like the fuel usage was randomized or somthing.

Check these two for example:
Fourth Leg: 75 MPH. Moderate tailwind. Used 6 gallons of fuel (271). Current MPG 9.65 MPG. Current Truck condition 99.3%
Third Leg: 65 MPH. Significant tailwind. Used 7 gallons of fuel (278). Current MPG 9.318 MPG. Current Truck condition 99.4%

Your truck was in worse condition, less wind assistance, you went faster, and you still used less fuel.

Sixth Leg: 75 MPH. Clear and Calm. Used 9 gallons of fuel (255). Current MPG 9.33
Current Truck condition 99%
Eighteenth Leg: 85 MPH. Significant Headwind. Used 9 gallons of fuel (160). Current MPG 9.02 Current Truck condition 96.5%

I don't see anyway these could use the same amount of fuel.


Nineteenth Leg: 68 MPH. Moderate Headwind. Used 10 gallons of fuel (150). Final MPG for the trip: 8.99 Current Truck condition 96.4%
Second Leg: 70 MPH, Moderate Headwind. Used 8 gallons of fuel (285). Current MPG 9.33 MPG. Current Truck condition 99.7%
Sixteenth Leg: 80 MPH. Slight Headwind. Used 9 gallons of fuel (178). Current MPG 9.18 Current Truck condition 97%

Besides a slight difference in condition, I don't know how the first run of 68mph could use more than the other two runs.


While I appreciate all this info, it still can't explain why after 60+ runs my fuel mileage went down. I guess this is like the Tootsie Roll commercial. The world may never know. I'm really going to miss my 10+ MPG legs though... <_<

What I really want to see is a formula on how the fuel is calculated. I doubt they will ever post that though.

I know, I noticed a lot of inconsistencies as well. I just might do another run like this to see if I can get some form of a pattern. As of right now, I'm as confused as you are.

The only thing I could think of is that your fuel economy/random breakdowns/etc. are determined when you select your route, and that is chosen by a specified range with a given percentage, think along the lines of "different scenarios"

You can't take the gallons used as fact. Remember this game is not so good with rounding numbers. As for the other mpg readouts, I wouldn't trust those on the route dashboard any more than I trust the mpg readout in a car/truck. Actual gallons used in the end is what matters. Have you owned your truck since before the latest trucks were added? It seems the stats on earlier trucks were different, but got grand-fathered in when the new trucks got changed. Perhaps overhauling reset the stats?

Kurt might be on to something - he's right about some trucks being grandfathered in with their old top-end stats - there's guy on here somewhere with a 125mph rig - something you can't buy anymore - maybe when that Pete came out it originally had a higher stock fuel economy rating and when you overhauled it, it downgraded it to what the new Pete's stock fuel economy figure is??

overhauling on a grandfathered truck doesn't matter...it still keeps its old stats.

Jeff is corret. If you overhauled it before all the new changes, then it keeps it as that. If you get a new truck after the changes and overhaul it then, it will be like the new changes. Hopefully. ;)

Not a grandfathered truck. I bought it this past April.

Here's another weird thing...The last four round trips I've used exactly 299 gallons.

I tried running 2 56,000 lb loads and I had 1 leg to go with 6 gallons of fuel and 30 some miles to go and it still wouldn't let me drive it.

I've yet to run 2 loads in a row without having to refuel

It's almost like something in the games dynamics changed and it was just a coincidence that I did my overhaul at the same time.

I just can't think of anything else that can explain how I could go 30+ round trip runs in a row with plenty of fuel, and now for the last 5 roundtrips since the overhaul I've had to refuel every time.

I have exactly the same issue.

I easily managed the FC to Yucca and back on one tank. I overhauled my truck when it reached 98% max and now I fall well short.

Prior to the overhaul I managed with 15% remaining. Now I am in the region of 8-10% short on fuel.

All upgrades have been sold and repurchased.

Truck is a 2009 Peterbilt 386.

This cannot be a random happening, there is clearly an issue here.

I have no idea, lately, I've been finishing runs with 150+ gallons of fuel. This is hauling at 61k lbs too

HAHAHA it IS something with the coding then!!

Almost every trip now from Yucca to Ft Cal I have been using 142 gallons. (53% remaining) Every now and then it's 147 gallons used.

This is really weird.

I am going to have to sell the truck and rebuy unless this is sorted out as I am falling well short and its costing extra in time and fuel costs.

If you're doing the Yucca to Ft Cal and back, why not just do a partial refuel in one of those places. If I make it the one way and need a little gas I'll refuel to 55% and then head back. My heaquarters are in Yucca (25% off repairs and fuel) and I've got a terminal at Ft Cal so it doesn't use any FP at either place.

Also, who are you driving for? I couldn't find you in the drivers listings.

My driver is Rubba Duckie.
That is what I am doing currently, but we should not be doing that as our trucks should manage the round trip.

I have a theory about why this is happening: The game has code that makes us use a certain set amount of fuel given certain conditions.

If your speed = "A", and the weather is "B", your weight limit = "C", and you have "X", "Y", "Z" upgrades, you'll use "J" amount of fuel.

Because A and B are highly variable, they're going to affect the outcome more than C, X, Y, Z (which act as multipliers/constants.)