A
amerikan
Guest
NBC SHOOTER!!! ur crazy man. 11 MPG.. someones has a heavy foot 
but thats good
but thats good
MPG Still Sucks at 4500 Miles
- Thread starter engine23ccvfd
- Start date
M
Marauderer
Guest
Dyno Pull
Guys,
The dyno pull is a good idea, but a typical dyno pull is done in third gear at WOT. Your A/F is going to be different under these circumstances than under cruise. Make sure they do a run that simulates cruising at different speeds. My car (as should be normal for any of our cars) tries to maintain a mid 14 at idle and in cruising situations, but is all over the place at WOT (tries to hit 12.2 but leans out to the 10's in the upper RPM's).
A cheaper way to tell if your car is running really rich is how often you have to clean the soot off the exhaust tips.
Bad gas mileage could also be caused by a bad alignment, low tire pressure, sticking brake caliper, cheap gas, etc.
BTW - I seem to get about 16 - 18 MPG in mixed driving, haven't taken a long enough trip yet to test purely highway driving, will report back after Thanksgiving.
Guys,
The dyno pull is a good idea, but a typical dyno pull is done in third gear at WOT. Your A/F is going to be different under these circumstances than under cruise. Make sure they do a run that simulates cruising at different speeds. My car (as should be normal for any of our cars) tries to maintain a mid 14 at idle and in cruising situations, but is all over the place at WOT (tries to hit 12.2 but leans out to the 10's in the upper RPM's).
A cheaper way to tell if your car is running really rich is how often you have to clean the soot off the exhaust tips.
Bad gas mileage could also be caused by a bad alignment, low tire pressure, sticking brake caliper, cheap gas, etc.
BTW - I seem to get about 16 - 18 MPG in mixed driving, haven't taken a long enough trip yet to test purely highway driving, will report back after Thanksgiving.
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BillyGman
New member
okay,
I know this is an old thread, but there are two things I've noticed here. The first is for engine23. I don't believe you've listed what octane you use. If you don't use 93 octane, perhaps the lower octane will cause worse gas mileage.
The second thing is how NBCshooter listed his gas mileage readings being so different w/two different brands of gas. But allow me to state the obvious here by saying that it wasn't the brand of gasoline that gave you such different gas mileage, but it had everything to do w/the fact that you left the O/D off for one tankfull while having the O/D on for the other. (did I read that right?). Ofcourse you'll get much poorer mileage w/the O/D off. Getting better gas mileage is one of the reasons for having O/D in the first place.
I know this is an old thread, but there are two things I've noticed here. The first is for engine23. I don't believe you've listed what octane you use. If you don't use 93 octane, perhaps the lower octane will cause worse gas mileage.
The second thing is how NBCshooter listed his gas mileage readings being so different w/two different brands of gas. But allow me to state the obvious here by saying that it wasn't the brand of gasoline that gave you such different gas mileage, but it had everything to do w/the fact that you left the O/D off for one tankfull while having the O/D on for the other. (did I read that right?). Ofcourse you'll get much poorer mileage w/the O/D off. Getting better gas mileage is one of the reasons for having O/D in the first place.
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jgc61sr2002
Contributing Member
Lowell - Your gas mileage is average. You can't ask for more than 24 MPG on the highway.Lowell said:
T
TripleTransAm
Guest
Gman, you confused NBC Shooter's post with mine... I didn't list results with two different octanes, he did.
I'm fairly confident that fuel mileage has a lot to do with the additives that are part of the blend of fuel, many of those additives being present in order to enhance the octane (there are several approaches).
My mileage-master fuel (92 octane Esso) recently went the way of the do-do, being replaced by a new 91 octane product as a result of cleaner refining processes (less sulfur content). They had different alternatives available to enhancing the octane back to 92, but decided against them all as a result of budgetary constraints. (heard all this from an employee with 'connections').
While I shouldn't be seeing a mileage drop with an octane drop (if anything, one would imagine the higher octane fuel being more resistant to burning), I sometimes got the impression the new 91 Esso stuff didn't give me the mileage their old 92 used to. Most likely a result of the different blend? In any case, I did notice a little audible pinging now and then with the 91, so I've since switched to Petro-Canada's 94 octane.
After my cylinder head was replaced, I began to notice lower-than-usual fuel mileage numbers, and thought maybe I was taking a hit with the new head. Turned out it was just my driving style that had gone down the sh*tter, and once I went back to taking it easy, looks like the numbers are back to normal (19-21 in mixed driving).
One thing I have noticed... this car does not like idling. This will definitely hurt the mileage for that tankful (more so than my other V8s). Also, as I mentioned many many months ago, seems like ~60 mph is the best range for highway mileage. Makes a heck of a difference from cruising at 70-75.
Also, while it may not be as much fun, in urban stop and go traffic it pays to keep the RPM below 2000 on launches, and let the upshifts and torque converter clutch application "pull" you up to speed. I've also tried to get it up into 4th gear ASAP and keep the engine RPM at around 1200-1300, in dense urban driving.
Not fun, I know... but it's a necessary compromise when one is trying to save up as much as possible in a short period of time to fund the purchase of an upgrade in living quarters...
I'm fairly confident that fuel mileage has a lot to do with the additives that are part of the blend of fuel, many of those additives being present in order to enhance the octane (there are several approaches).
My mileage-master fuel (92 octane Esso) recently went the way of the do-do, being replaced by a new 91 octane product as a result of cleaner refining processes (less sulfur content). They had different alternatives available to enhancing the octane back to 92, but decided against them all as a result of budgetary constraints. (heard all this from an employee with 'connections').
While I shouldn't be seeing a mileage drop with an octane drop (if anything, one would imagine the higher octane fuel being more resistant to burning), I sometimes got the impression the new 91 Esso stuff didn't give me the mileage their old 92 used to. Most likely a result of the different blend? In any case, I did notice a little audible pinging now and then with the 91, so I've since switched to Petro-Canada's 94 octane.
After my cylinder head was replaced, I began to notice lower-than-usual fuel mileage numbers, and thought maybe I was taking a hit with the new head. Turned out it was just my driving style that had gone down the sh*tter, and once I went back to taking it easy, looks like the numbers are back to normal (19-21 in mixed driving).
One thing I have noticed... this car does not like idling. This will definitely hurt the mileage for that tankful (more so than my other V8s). Also, as I mentioned many many months ago, seems like ~60 mph is the best range for highway mileage. Makes a heck of a difference from cruising at 70-75.
Also, while it may not be as much fun, in urban stop and go traffic it pays to keep the RPM below 2000 on launches, and let the upshifts and torque converter clutch application "pull" you up to speed. I've also tried to get it up into 4th gear ASAP and keep the engine RPM at around 1200-1300, in dense urban driving.
Not fun, I know... but it's a necessary compromise when one is trying to save up as much as possible in a short period of time to fund the purchase of an upgrade in living quarters...
J
Jeff
Guest
I just glad to have gas mileage.
LOL I'm a late contributor for this thread.
Coming back from St. Thomas Ontario from our annual CV.net pilgrimage to the Ford plant and the Most Excellent St. Thomas International dragway, I found with cruise on and set at 75 MPH the Marauder returned 26 MPG on the NY Thruway, gassing at whatever Mobil? was at the Thruway service areas.
I was impressed by this, as my former 2001 Crown Vic Sport's best #'s were aprox 17MPG.
Best,
Paul
Coming back from St. Thomas Ontario from our annual CV.net pilgrimage to the Ford plant and the Most Excellent St. Thomas International dragway, I found with cruise on and set at 75 MPH the Marauder returned 26 MPG on the NY Thruway, gassing at whatever Mobil? was at the Thruway service areas.
I was impressed by this, as my former 2001 Crown Vic Sport's best #'s were aprox 17MPG.
Best,
Paul
T
TripleTransAm
Guest
So whadda ya say, folks? Is the annual St.Thomas visit a good reason to have a Canadian Marauder roundup? C'mon guys, I'm getting lonely up here...
marauder307
Jack Ryan Incarnate
Routinely get 17-17.5 mixed driving in town. St. Louis, and MO state I think, have a mandate for 10% ethanol in their fuels. I mention this because my mileage has dropped off slightly since moving up here, and FL and AL don't carry the ethanol. There is Phillips 66 place 'bout a mile from home that sells racing fuel for about I usually get the Costco 93 octane, but ever so often I'll run out a tank and refill with FuelMan (now Shell) 93 octane.
Canada
St. Thomas< < < < < < wherever....2004 Marauder Round-up:
Caribbean
If its (St. Thomas) in Canada, that will require about a 3 day drive.
If its (St. Thomas) in the Caribbean, that will require some serious marine type mods and a quick course on celestial navigation.
Please advise, ASAP!!
St. Thomas< < < < < < wherever....2004 Marauder Round-up:
Caribbean
If its (St. Thomas) in Canada, that will require about a 3 day drive.
If its (St. Thomas) in the Caribbean, that will require some serious marine type mods and a quick course on celestial navigation.
Please advise, ASAP!!