Diesel fuel mileage
#2960477
09/02/21 10:13 PM
09/02/21 10:13 PM
|
Joined: Jan 2004
Posts: 8,637 fredericksburg,va
cudaman1969
OP
master
|
OP
master
Joined: Jan 2004
Posts: 8,637
fredericksburg,va
|
Has anyone else seen a drop in fuel mileage in their diesel trucks in the last 5-6 months? Reason being my 06 Dodge I checked around thanksgiving got 19.7 on a thousand mile trip, usually around town 17-18. Last 3 times I’ve checked it’s now 14.6 and consecutive checks this summer. 134,000 miles on truck and still runs great. Not using that lie gauge either, actual gallons into odometer miles. In 15 years it’s never got that bad of millage. Do you think the cetane rating has dropped
Last edited by cudaman1969; 09/03/21 12:10 PM.
|
|
|
Re: Diesel fuel mileage
[Re: cudaman1969]
#2960615
09/03/21 12:07 PM
09/03/21 12:07 PM
|
Joined: Jan 2003
Posts: 10,931 North Dakota
6PakBee
I Live Here
|
I Live Here
Joined: Jan 2003
Posts: 10,931
North Dakota
|
Around here that happens every winter when the stations go from #2 to a 'blend' and then to #1 if it gets cold enough to take the brass monkeys indoors. The cetane rating drops accordingly.
"We live in a time when intelligent people are being silenced so that stupid people won't be offended".
|
|
|
Re: Diesel fuel mileage
[Re: 6PakBee]
#2960920
09/04/21 10:59 AM
09/04/21 10:59 AM
|
Joined: Feb 2003
Posts: 16,186 Mesa, Arizona
dart4forte
I Live Here
|
I Live Here
Joined: Feb 2003
Posts: 16,186
Mesa, Arizona
|
I’m averaging 20.5 mpg in my 07. Had a complete fuel system flush back in May. Anyway, in June I hauled a 69 RR UP TO Washington averaging around 14.5 mpg and coming home hauling my 52 PU with an average of 15 mpg. All this was had calculated verifying the Lie O Meter. Did a trip up into the mountains in July and got 22 mpg. I just turned over 317k miles and since buying the truck haver gotten that type of fuel mileage. By the way, the fuel system flush was a BG product.
“So if it’s on the internet it must be true”
Abe Lincoln
|
|
|
Re: Diesel fuel mileage
[Re: 1969ronnie]
#2960981
09/04/21 03:10 PM
09/04/21 03:10 PM
|
Joined: Jan 2005
Posts: 12,478 Kalispell Mt.
HotRodDave
I Live Here
|
I Live Here
Joined: Jan 2005
Posts: 12,478
Kalispell Mt.
|
Yup , and depends on how much Bio-Fuel they are pumping into your diesels fuel in your area . NOT supposed to go over 20% . but they always do . R So 20% bio fuel makes MPG go down 25% ??? Something don't add up there especially since some guys run 100% bio fuel and don't get significantly different MPG...
I am not causing global warming, I am just trying to hold off a impending Ice Age!
|
|
|
Re: Diesel fuel mileage
[Re: HotRodDave]
#2961057
09/04/21 08:53 PM
09/04/21 08:53 PM
|
Joined: Jan 2003
Posts: 15,829 Omaha Ne
TJP
I Live Here
|
I Live Here
Joined: Jan 2003
Posts: 15,829
Omaha Ne
|
Sounds like the ethanol ploy is moving over to Diesel fuel. Hey it worked on gas, lets do diesel now. We'll sell it at a cheaper price initially to entice the idiots to buy the cheaper fuel. They won't realize that although it appears cheaper, they're using more as the MPG drops. So we'll sell them more ethanol fuel at a higher profit. Then we'll jack the price of the non ethanol fuel up to make it's cost equal to the ethanol garbage. The consumer will start using the ethanol and we make more $$
|
|
|
Re: Diesel fuel mileage
[Re: HotRodDave]
#2961109
09/04/21 11:58 PM
09/04/21 11:58 PM
|
Joined: Jan 2003
Posts: 8,222 Plymouth, MI
Blusmbl
master
|
master
Joined: Jan 2003
Posts: 8,222
Plymouth, MI
|
Yup , and depends on how much Bio-Fuel they are pumping into your diesels fuel in your area . NOT supposed to go over 20% . but they always do . R So 20% bio fuel makes MPG go down 25% ??? Something don't add up there especially since some guys run 100% bio fuel and don't get significantly different MPG... It doesn’t, biodiesel doesn’t provide a significant fuel economy shift (it isn’t like ethanol in a gas engine). Something is wrong with the original poster’s truck, I’m guessing it has an injector on its way out.
'18 Ford Raptor, random motorcycles, 1968 Plymouth Fury III - 11.37 @ 118
|
|
|
Re: Diesel fuel mileage
[Re: 6PakBee]
#2961127
09/05/21 03:13 AM
09/05/21 03:13 AM
|
Joined: Aug 2003
Posts: 43,719 Bend,OR USA
Cab_Burge
I Win
|
I Win
Joined: Aug 2003
Posts: 43,719
Bend,OR USA
|
Around here that happens every winter when the stations go from #2 to a 'blend' and then to #1 if it gets cold enough to take the brass monkeys indoors. The cetane rating drops accordingly. Isn't #1 diesel fuel the same as jet A fuel and or kerosene ? Or is that #2 diesel fuel? I saw a distinct drop in fuel mileage when they changed from the old diesel mix to the current low sulfur mix around 2 MPH on the road and in town
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
|
|
|
Re: Diesel fuel mileage
[Re: Cab_Burge]
#2961139
09/05/21 06:39 AM
09/05/21 06:39 AM
|
Joined: Jan 2003
Posts: 10,931 North Dakota
6PakBee
I Live Here
|
I Live Here
Joined: Jan 2003
Posts: 10,931
North Dakota
|
Around here that happens every winter when the stations go from #2 to a 'blend' and then to #1 if it gets cold enough to take the brass monkeys indoors. The cetane rating drops accordingly. Isn't #1 diesel fuel the same as jet A fuel and or kerosene ? Or is that #2 diesel fuel? I saw a distinct drop in fuel mileage when they changed from the old diesel mix to the current low sulfur mix around 2 MPH on the road and in town Don't know. I am relatively sure that #2 is similar to home heating oil. When I worked in a gas station years ago we didn't have diesel but we had what Enco called "#2 burner" which we delivered for home oil furnaces.
"We live in a time when intelligent people are being silenced so that stupid people won't be offended".
|
|
|
Re: Diesel fuel mileage
[Re: 6PakBee]
#2961205
09/05/21 11:24 AM
09/05/21 11:24 AM
|
Joined: Jan 2003
Posts: 28,714 Shopping @ HoBo Fright
340SIX
Doc Flappergas's Evil Twin
|
Doc Flappergas's Evil Twin
Joined: Jan 2003
Posts: 28,714
Shopping @ HoBo Fright
|
Around here that happens every winter when the stations go from #2 to a 'blend' and then to #1 if it gets cold enough to take the brass monkeys indoors. The cetane rating drops accordingly. Isn't #1 diesel fuel the same as jet A fuel and or kerosene ? Or is that #2 diesel fuel? I saw a distinct drop in fuel mileage when they changed from the old diesel mix to the current low sulfur mix around 2 MPH on the road and in town Don't know. I am relatively sure that #2 is similar to home heating oil. When I worked in a gas station years ago we didn't have diesel but we had what Enco called "#2 burner" which we delivered for home oil furnaces. I can not remember if Jet A was 1 or 2 but we ran Jet A but added one quart motor oil to it per 10- 15 gallons Jet A. Did not run it drier tgan 1 quart per 15 gallons. We did pick up mialge but ran just as good as summer fuel we get here in the south I never ever ran winter. But was offered at the truck stops cost was more $. When I got my 1st oil burner fuel was $0.49 gallon
|
|
|
Re: Diesel fuel mileage
[Re: Twostick]
#2961267
09/05/21 03:19 PM
09/05/21 03:19 PM
|
Joined: Jan 2004
Posts: 8,637 fredericksburg,va
cudaman1969
OP
master
|
OP
master
Joined: Jan 2004
Posts: 8,637
fredericksburg,va
|
When was the last time you adjusted the valves on it?
If they've never been done, that might be where at least some of it went.
Any 3406 CAT engines I had were real fussy with valve settings. They called for .015 and .030 and they didn't mean .014 and .029. Fuel mileage would suffer by a few tenths.
Kevin 134,000 and covers have never been off
|
|
|
Re: Diesel fuel mileage
[Re: Twostick]
#2961353
09/05/21 08:22 PM
09/05/21 08:22 PM
|
Joined: Jan 2003
Posts: 28,714 Shopping @ HoBo Fright
340SIX
Doc Flappergas's Evil Twin
|
Doc Flappergas's Evil Twin
Joined: Jan 2003
Posts: 28,714
Shopping @ HoBo Fright
|
Jet fuel was also #1 but more refined. It was also known as Water White Kerosene. I used to haul it out of Fulton NY but never as Jet Fuel.
Kevin
The owners manual with my 1994 Ram 2500 said cold weather you could run lerosene but had to add motor oil 1 quart per 10 gallons kerosene. The military said same with Jet A in the Generators and trucks as it was to refined to add oil. But tgat never came about at the base since thet had the right fuel to not have to substitute Jet A
Last edited by 340SIX; 09/05/21 08:25 PM.
|
|
|
|
|