Post your MPG

In mileage discussions, it would be nice to know the speeds for the quoted MPG amounts.


We can get anywhere from 14 to over 17 with our 07, near max load Roadtrek 190P on a Chevy with a 6.0L engine. Assuming similar wind conditions as we need to do is go 50mph our up to 75+mph.


One tankful is mot really useful information for mileage in many cases as fill volumes and pump shutoffs vary to much, IMO, as do wind conditions and routes. If you go from 10k elevation to 5K on any given tank you will probably get quite good mileage even if it is roller coaster type road.


We keep track of mileage on a full trip bases, by not resetting the Scangauge (which is carefully calibrated to our use over many miles) over the entire trip and then filling at the same pump when we get home. Usually in the 20-K miles, sometime less and sometimes up to 7K. That includes all driving on the trip so all the slow, traffic, campground, city, country etc is included. On that basis we pretty consistently get about 14.5mpg per trip and we drive about 72mph on the freeways, so not trying for high mileage.


Many/most factory speedo/odo information is about 2-3% high from what I have seen, so that will reduce your actual mileage calc if you know how much it actually is and factor it in. Our Chevy was off by about 3% and that turns 15mpg into 14.5mpg. I have a tuner so I was able to recalibrate the odometer to read nearly right on, except for tire wear over time. Speed is also now very close on the speedo.
 
Mid ohio to Finger lakes NY

Just drove my 2022 Play, 4000 miles, from mid Ohio to Finger lakes NY. Ohio to Erie got 21.4 mpg. From Eries to Watkins Glenn NY got 19.2
 
Just drove my 2022 Play, 4000 miles, from mid Ohio to Finger lakes NY. Ohio to Erie got 21.4 mpg. From Eries to Watkins Glenn NY got 19.2


What was the overall trip mileage? Larger data pool can make a big difference when compared to individual short legs.
 
MPG for a 3.6 V6 gasoline Ram Promaster 2500 RV (Sublight V1), 16.5 overall computed over 35,000 miles. Up to 19.6 mpg on long highway trip.
 
MPG for a 3.6 V6 gasoline Ram Promaster 2500 RV (Sublight V1), 16.5 overall computed over 35,000 miles. Up to 19.6 mpg on long highway trip.

That's about par for our 2014 PM DIY. Averaged 18.5 before MaxxAir and solar.
 
Ram 3500XL Thor Class B, 2024, 18.8 MPG.

That's about consistent with my best trips in mine as well.

2021 RoadTrek Chase(Zion), Promaster 3500 Ext. 3.6L Gas, 6AT

I do Palm Springs to Sacramento and back every few weeks. I generally average 17.6 to 18.5 over the whole ~1100 mile trip depending on time of day and wind conditions.

I try to stay between 65-75 mph on the freeway portions. Sometimes lower or higher on a certain stretch will yield better results.
 
For the last 30 fill-ups 20.02mpg average, this includes diesel consumed for heating the van and water.
2013, Sprinter Camper Van, V6 diesel.
 
Ford Transit HR AWD 8,500 # loaded we average 17.6 - 18.4 mpg consistently dividing gallons into mileage not using the trucks consumption readings. Speeds usually less than 65 mph; over 70 mph consumption increases to around 15 mpg - direct correlation to the right foot weight!
 
About 10.5 MPG

IMG_8930.jpg
 
07 190P 6.0 chevy We were getting 12mpg, replaced the wheel bearings and are now getting 13mpg. 100,000 miles of data. normally racing that thing trying to get where we are going, drive like smokey and the bandit. *get same fuel economy pulling racecar trailer, guess it's because slower speeds.
 
07C190P with 123K miles. GM Factory rebuilt engine last summer. 🤬
I noticed during a trip from Chicagoland to FL and back a couple months ago that mileage was dropping from its normal (since I bought it last Mar…) 12-13 mpg by about a mile or so per gallon each tank. Also started noticing a growing “clunk” with each gear shift. Hmmm. The last tank was 9.5 mpg at about 78 mph on the way home. 😳 ( Heck, my Class A gets 8-10 mpg!)
Took it to my mechanic who referred me to a local tranny shop and wouldn’t you know, it needed to be rebuilt. 🤬
I picked it up and left the next AM on another trip to FL a couple weeks ago. I got 12.3 mpg the first tank and it increased every tank until getting back. It was 16.1 mpg the next to last tank and 17.3 on the last tank! (At this rate, the tranny rebuild will pay for itself! 😊)
I don’t realistically expect this trend to continue and would be tickled to death if it stays above 15 mpg long term! I’m looking forward to my next trip to check it out!
 
07C190P with 123K miles. GM Factory rebuilt engine last summer. 🤬
I noticed during a trip from Chicagoland to FL and back a couple months ago that mileage was dropping from its normal (since I bought it last Mar…) 12-13 mpg by about a mile or so per gallon each tank. Also started noticing a growing “clunk” with each gear shift. Hmmm. The last tank was 9.5 mpg at about 78 mph on the way home. 😳 ( Heck, my Class A gets 8-10 mpg!)
Took it to my mechanic who referred me to a local tranny shop and wouldn’t you know, it needed to be rebuilt. 🤬
I picked it up and left the next AM on another trip to FL a couple weeks ago. I got 12.3 mpg the first tank and it increased every tank until getting back. It was 16.1 mpg the next to last tank and 17.3 on the last tank! (At this rate, the tranny rebuild will pay for itself! 😊)
I don’t realistically expect this trend to continue and would be tickled to death if it stays above 15 mpg long term! I’m looking forward to my next trip to check it out!
Same thing happened to me while in Florida. Torque converter clutch was slipping. Hard shifts (due to computer applying max pressure to TCC) and reduced gas mileage. Had transmission rebuilt. Shifts great, and good mileage. These vans are heavy and stress the transmission at each shift. I had been changing transmission fluid at 50,000 miles but will change to every 25,000 miles.
 
07C190P with 123K miles. GM Factory rebuilt engine last summer. 🤬

What happened to the engine to fail that early at just over 100K. The 6.0 engines seem to last very much longer than that most of the time.
 
What happened to the engine to fail that early at just over 100K. The 6.0 engines seem to last very much longer than that most of the time.

It had a "tic-tic-tic" sound when I bought it from a friend in GA. I'd flown down to pick it up and I was assured it had always done that and had been specificacally checked out by a great mechanic who always insisted that was normal. Online research indicated it wasn't unusual and when I arrived home with it, my mechanic said it "was probably ok, but warranted monitoring".
During a trip to OH, I was on the interstate next to O'Hare in Chicago and the "tic-tic-tic" suddenly went to "BANG-BANG-BANG" I pulled over and called my mechanic and let him listen. He pronounced it DOA over the phone. Oil pressure (45-50 psi) and temp (180-190) remained steady before and after with no indication anything was about to happen, or had happened, other than the obvious sound change.
Since it would tie his small shop up for weeks to do a job that size, he referred me to another nearby shop who charged me $16K for the repair. (I told them I didn't want a junk-yard motor, but dadgum!) I was robbed for what felt like the second time since buying it for $53K, but that's the risk you take when buying used and ignoring a concern with that potential for $*$&@*@(... BTW, my mechanic freaked when he heard of the cost and called the shop that did the work and cancelled all his jobs with them and no longer refers anyone there. I've since learned they have a reputation for greatly overcharging. I considered pursuing the issue further but decided life is too short and to just move on to happier things...
 
It had a "tic-tic-tic" sound when I bought it from a friend in GA. I'd flown down to pick it up and I was assured it had always done that and had been specificacally checked out by a great mechanic who always insisted that was normal. Online research indicated it wasn't unusual and when I arrived home with it, my mechanic said it "was probably ok, but warranted monitoring".
During a trip to OH, I was on the interstate next to O'Hare in Chicago and the "tic-tic-tic" suddenly went to "BANG-BANG-BANG" I pulled over and called my mechanic and let him listen. He pronounced it DOA over the phone. Oil pressure (45-50 psi) and temp (180-190) remained steady before and after with no indication anything was about to happen, or had happened, other than the obvious sound change.
Since it would tie his small shop up for weeks to do a job that size, he referred me to another nearby shop who charged me $16K for the repair. (I told them I didn't want a junk-yard motor, but dadgum!) I was robbed for what felt like the second time since buying it for $53K, but that's the risk you take when buying used and ignoring a concern with that potential for $*$&@*@(... BTW, my mechanic freaked when he heard of the cost and called the shop that did the work and cancelled all his jobs with them and no longer refers anyone there. I've since learned they have a reputation for greatly overcharging. I considered pursuing the issue further but decided life is too short and to just move on to happier things...
You never stated what the issue was with the engine. I thought they all ticked a little bit.
 
What is interesting is that the oil pressure held and it apparently kept running. Not many ways that can happen, I think.

My guess would be failed/jammed lifter or broken rocker arm.

The lifter would have to stay in the bore to hold pressure so damage might not have been totally fatal. It would have been interesting if they had pulled the valve covers and looked and maybe a camera look in the cylinders.

The GM stuff has always seem to have ticks, mostly from leaking exhaust manifolds, I think. Unfortunately the exhaust and lifter ticks often sound the same so hard to tell sometimes.
 
You never stated what the issue was with the engine. I thought they all ticked a little bit.
Was told it was a broken rod, but I never got to see any of it, which was part of my reason for considering taking action. Again, I decided to get on with the good stuff in life and leave this mess behind. I thought the ticking wasn't completely unusual based on what I'd read, but I'm not a mechanic and don't know other than what I was told.
 
Was told it was a broken rod, but I never got to see any of it, which was part of my reason for considering taking action. Again, I decided to get on with the good stuff in life and leave this mess behind. I thought the ticking wasn't completely unusual based on what I'd read, but I'm not a mechanic and don't know other than what I was told.
It must have shaking like crazy if it kept running with a broken rod as it would be really far out of balance.

Was it leaking oil or water?
 
It must have shaking like crazy if it kept running with a broken rod as it would be really far out of balance.

Was it leaking oil or water?
No shaking, no leaks, just a loud bang-bang-bang that altered in tempo with rpms...

The point of my post however was the mileage increasing so much after the transmission rebuild. I was told to expect 16-18 mpg when I first bought my RT, but never got even close until after the rebuild. Truth is, I thought that number was exaggerated just a bit when I first heard it and while disappointed, I wasn't surprised to only get 12-13 to start. I'm looking forward to seeing how it plays out and if it will stay anywhere near where it is now.
 
We probably have the near exact same van. 16-18mpg is a stretch and 12-13mpg is probably low, but the mileage is very speed dependent for us.

We can reliably get between 16 and 17mpg at a steady 50mph with no wind influence for the better or worse.

It goes on sliding scale after that as you speed up and at 75mph it normally sits in the low/mid 13s.

Our normal mixes of freeway, city slow downs, two lanes, around parks type trips pretty consistently come in at 14.5mpg these days. These are with the 10% ethanol fuels we see nearly all the time.

We are now on a set of the new model Michelin LTX MS2 tires in different size than we had before and the initial 300 mile test might indicate they will make it a bit better, but won't know until later this year when I get over shoulder surgery and finish a mod I had started on the van. Past tire size was 265-75/16 and current size is 265/70/17 and both are larger than the stock 245/75/16 tires.

The torque converter failures in the years around us are making me a bit uncomfortable as there don't appear to be known why they happen.
 

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