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  #21  
Old September 28th, 2011, 09:15 AM
JKC
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John
1997 D-90
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10-12 mpg. Doesn't vary much between in-town and highway. Unless you are excessively speeding in which case you can watch the fuel needle drop as you go!
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  #22  
Old September 28th, 2011, 09:25 AM
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Brian Jones
1995 D-90 ST #2892
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I prefer not to think of the mileage. I just look at it that I always have fresh gas in the tank.
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  #23  
Old September 28th, 2011, 09:27 AM
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Charles Galpin
'94 D90 ST, '63 SeriesIIA
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That's a great outlook. I like to think I'm stimulating the economy and helping the oil companies make even more profit (better this way than through their credit card assets).
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  #24  
Old September 29th, 2011, 11:45 PM
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Bradlee Duncan
'94 White and '95 Red D's
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I get 13-14mpg on the freeway and a little less around town. If you have a slushbox (auto) then you'll get a bit less.
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  #25  
Old September 30th, 2011, 10:22 PM
soturi
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Matthew
1984 300tdi
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Location: Clarksville, TN
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good god. i got 20 on my last tank, mixed driving - and i have a chipped compressor wheel and i'm pretty sure my IP needs a good stern looking-at. 300tdi ftw.

however, i've been meaning to ask this:

it's a RHD import, but the speedometer is marked in MPH, w/ the KPH "after-though" markings, a la US vehicles... is this standard in UK vehicles? it's quite the opposite of what i would think it should be. also, since MPH is the dominant marking on my spedo, is it safe to assume my odometer is measuring US miles? or am i calculating my "sweet" 20 mpg on imperial gallons?
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  #26  
Old October 1st, 2011, 12:16 AM
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Bradlee Duncan
'94 White and '95 Red D's
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Since the miles in the UK and the US are the same and you're pumping the fuel in US gallons (if you're using an American pump) then your mpg calculation would be US MPG, not Imperial MPG. Of course, this is assuming that your speedo/odometer is correct... I'd say 20mpg is probably pretty close for a 300tdi. It's a great engine!
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  #27  
Old October 1st, 2011, 11:34 AM
soturi
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Matthew
1984 300tdi
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Quote:
Originally Posted by cbass View Post
Since the miles in the UK and the US are the same and you're pumping the fuel in US gallons...
wow i'm an idiot. talk about not stopping and thinking about what you're typing... every time i would think/read "imperial gallon", my brain would automatically understand "imperial miles". why? i have no idea. it doesn't even make sense.

oops.
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  #28  
Old October 1st, 2011, 11:54 AM
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Bradlee Duncan
'94 White and '95 Red D's
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That's understandable, when written out long hand, that's what it looks like "Imperial miles per gallon" :-)
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  #29  
Old October 1st, 2011, 05:35 PM
soturi
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Matthew
1984 300tdi
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yea... yeah, that's it! totally expectable... =D
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  #30  
Old October 1st, 2011, 08:15 PM
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Ethan
'73 SIII/ D90 Hybrid
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Out of curiosity, does anyone here run a standalone fuel injection system on their truck? I'm a British car fan and all, but I acknowledge the fact that lucas isn't anything to write home about. I mean, it's pretty amazing that they can still make a fuel injection system that can easily flood itself out. I'm curious what anyone running standalone fuel injection gets for MPG. Sequential fuel injection just makes sense. Just say-in'.
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  #31  
Old October 1st, 2011, 11:20 PM
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Bill Adams
66 109 sw 94 lwb
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SFI isn't any better or worse than bank fire. Megasaquirt is the only type I have any familiarity with, other than the 14cux.
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  #32  
Old October 1st, 2011, 11:42 PM
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Ethan
'73 SIII/ D90 Hybrid
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Interesting. For some reason I'm surprised there wouldn't be any economy advantages (even just a couple mpg) over bank fire. I guess the biggest advantage would be flexibility with those swapping in crazy engines, like that guy with the corvette swap... I run an Autronic ecu in one of my cars (they are from Australia) in one of my cars I did an engine swap on. It's totally awesome to have the flexibility to control your own fuel and ignition maps (not to mention never having to buy a "chip") and is quite reliable. Maybe there just aren't a lot of gains to be had over the stock maps of these things? Do people even chip these trucks?
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  #33  
Old October 2nd, 2011, 06:09 AM
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Santiago
´96 Defender 110 VGTdi SW County
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I can go as good as 27 highway (without roof rack) and as bad as 15 offroading, usually around 20 every day mixed driving. 110 300Tdi.
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  #34  
Old October 6th, 2011, 11:30 PM
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peter
D90
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I get 14 most of the time, lowest seen 11 off road, but still usually close to 14. I'm running the auto.
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  #35  
Old October 8th, 2011, 08:12 PM
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Dennis Yard
1993 NAS D-110 #55
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in my case:
NAS 110 with 4.6 block and ZF auto trans.

10 mpg around town and 14 on the freeway on Chevron 89 octane.
31 inch tires. Speedometer runs about 7% higher than GPS speed.
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  #36  
Old October 11th, 2011, 03:28 PM
muhley
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matt
110 300 tdi
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Join Date: Feb 2011
Location: enc
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My drive train is 1995 300tdi front to rear. With 7.5 16's I was getting 26mpg freeway. Just put on a set of bfg km2's in 255 85 r16 load range E and the mpg dropped to 21 freeway. The tires are rated to 80 psi, I've never run them that high, but at 60psi it felt like i was driving on ice. They are at 40psi now and feel better but don't know where I should have them. Does any one get better mpg with these tires?
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  #37  
Old October 14th, 2011, 01:53 AM
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George
1997 D90 SW
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With 40% city and 60% hwy I got 15 mpg last time around. Let see what happens when do some changes to the engine in the coming months? Im tying for 17mpg from a 1997 Auto 4.0l.
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  #38  
Old October 19th, 2011, 11:40 PM
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Robert Lynch
1995 NAS
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just did over a 1000 miles in the 90 - trip to High spring FL and back to raleigh - avg was 15mpg all highway
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  #39  
Old October 20th, 2011, 02:07 PM
CDeWan
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Clay DeWan
5.3L beastie
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12/14 with stock drive train and and 1.4T case original

Now 11/13 with Detroit in the rear/Truetrac up front and 1.2T case from 2003 DII.

but I am in SoCal so average speed on the interstate is 74MPH - not going to swear to this . We drive really nutty around here.
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  #40  
Old October 20th, 2011, 02:07 PM
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George
1997 D90 SW
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Quote:
Originally Posted by rlynch356 View Post
just did over a 1000 miles in the 90 - trip to High spring FL and back to raleigh - avg was 15mpg all highway
What was your average speed on the HWY please? Stock drive train?
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