I dunno.... Guess this calls for a and a "ROFL".

Several years ago on this forum, somebody posted a similar tongue-in-cheek thread after we had a number of people claim that they got over 25 miles per gallon with a CTD - that was when diesel prices climbed above gas prices for the first time. Everyone "got" that thread and a bazillion people responded with their own suggestions. What's happened here?

Point is - you can't get 25 miles per gallon with a CTD unless you're driving on roads like the ones I listed. Every one of them has a significant slope downward for many miles - 24 miles being the shortest, roughly 165 miles being the longest. Sure you can get 25-30 mpg on all of them, because you can coast half the time. The other half only requires a light touch on the accelerator pedal.

 

I got better than 25mpg on Hwy 89 between Afton, WY and Logan, UT (~120 miles, 6000'-7500'-4400') once in a snow storm. Was doing between 35-55 mph the whole way in 4-high.

 

22.82mpg was my record. Long trips and keeping it around 70-72mph or less gives the best #'s. 23mpg is the # to break for me. 25mpg would be sweet but for an old 4x4 I'll take what I'm getting and be happy.

 

So why post a worthless situation?

 

I took at trip to Detriot to watch the Tigers last weekend when they played the Cardinals. I am a hundred miles or so to the North and I got 24.3 as a hand calculated average round trip. That is a mix of 60 mph and about 73 on the highway. I am using Lucas as a fuel additive.

 

ive never really calculated to be honest...but i have noticed that rpms need to be well below 2000 for best economy and overrall speed around 60mph sipped fuel far less than 70mph..the problem is that nowadays it is almost impractical to be on the highway going 60mph...gotta keep up with traffic to a degree during the daytime..but nighttime i slow down and enjoy the fuel economy more

 

I tried driving my daily drive at 55 mph (1600 rpm), and at 70+ (1900 rpm). I get 18.1 if I am lucky and 17.5 if I am not. I am not going to sweat it one way or another. Makes absolutely zero practical difference. It makes a lot more difference for my wallet if I pack a sandwich and a bottle of water on a trip rather than eating out and buying coke out of vending machines.
-P

 

Depends on your definition of "worth", I guess. And whether or not you get it. I suspect you do - and that this is your attempt at creating drama.

A lot of the people who posted here years ago had good humor and an interesting sense of irony. I notice they're mostly gone.

 

I didn't get it at first, but when you posted later that it was I was like . I don't usually see many of your posts so I didn't know your personality. I do now!

 

No drama, I think your first post created the drama. I know of an 03 auto that got 29+ going from Amarillo to Denton w/ a tail wind. It's mostly downhill. He was going 55.

 

yeah, we have a down slope road comming back from NM/CO through Raton,NM to eastern OK which is around 500 + miles. Raton is around 7000' and eastern OK is 700'. My Cummins will run 22.5 to 24 [wind makes a big difference] comming down. The trip going up will run a couple less and the wind is a player as usual out here. Towing my 11200 GVWR 5er comming down will average 13.5 but going up will average a couple less. US 412/US 64 has no mountains or BIG hills on the part we travel. The doubters on here remind me of the PSD crowd and gasser boys over on RV.net when the Cummins crowd post our mpgs. I have a 600 mile a week commute and my Cummins will average 22+ mpgs. We commute long miles out here and the best that I have heard from my neighbors is a old late '80s Ford 6.9 IDI stock with a five speed manual. He is a international mechanic and has restored and drives every day with his wife. They commute around 800 mile a week. He drives about 10 under the hiway speed limit and averages 23 to 25 mpgs tank after tank.
We have a few neighbors that use their 3500 DRW 4x4 4.10 gears auto crew cabs big tires and other heavy options and no they don't get the higher mpgs our lighter 2500 2wd stock tires 6 speed manuals 3.54 or 3.73 trucks will. We don't have a city out here so can't give any city mpg numbers.
JIM

 

the best I ever got on a tank with my 2wd 305 555 auto QC LB was just shy of 27 MPG (imperial), probably 23 MPG US.
I really had to try hard to get that, and I got this by driving really conservatively on highways without much traffic.
Not a practical way to drive on a day to day basis.
But if you avoid jack rabit starts, controll your breaking and keep her below 1800 RPM, you can get pretty good mileage.
The only time I got better milage than that was when I had it towed for a lift pump replacement.

 

anywhere from 5 to 7.5 mpg and at 22,000lbs I get 14-15 so am thinking they are way more efficient

 

I-80 going west from the Park City summit to downtown Salt Lake City - the Parley's Summit slalom race, a bit short, but fun - mileages varies above 25 mpg depending on traffic and how reckless I get.

(Its about a 5% Grade downhill)

I-15 going south from Cedar City, Utah, to Mesquite, Nevada - beautiful country, 30 mpg is possible, but look at the road every once in a while.

(Its about a 3% Grade downhill)

 

My best is 25.9MPG. I did this a few weeks ago after a little over 300 miles of slow driving on an old 2-lane highway. If I would have been on the interstate driving 65 plus, I would have been in the high teens or maybe low 20's.