VWDiesel.net The IDI, TDI, and mTDI source.
Engine Specific Info and Questions => IDI Engine => Topic started by: 1life2live on December 22, 2008, 12:01:39 pm
-
Just curious what everyone is getting for fuel mileage with or without mods. All i have done is turned the fuel screw in 1/2 turn and spun the pin in the lda and set the boost to 18psi and on this last tank i only got 37mpg. :( Just wondering if thats close to everyone else or if maybe i have something off like the pump timing and im wasting to much fuel. Lets see what everyones getting and what kind of mods you have.
-
Winter's very hard on a diesel's fuel economy... winterized fuel has fewer BTUs, tires are stiff, oil is thick, snow is hard to push thru, and engine takes much longer to get to efficient operating temperatures.
The literature reports declines between 10-25% for diesel-powered cars during the winter.
Other factors: engine size ? chassis ? ratio of highway/city ? Driving style ? Hills ?
BTW, there's people on this forum from all over the globe so we'll need to know your location. I'm betting my gallons are not the same as your gallons ??!! :wink:
To (finally) answer your question: my 1.9l AAZ, with about 10K miles since rebuild, using dino 10W30 breakin oil, a hot pump, 20+ psi of boost, Goodyear Blizzaks, is getting about 35 miles to the US gallon.... all of it in the city, at temperatures around -15F.
-
When my Jetta was still stock, it did 46.76 MPG for the last tankful.
That was including some quick back-road driving and performance measurements as well.
All stock, except boost turned to 1.2 bar (about 17 psi) and fuelling turned a bit up. That MPG was measured over a drive of ~1000 km.
-
1.6 stock aside from a bad ass pump from Giles, K&N panel filter, WG blocked off boosted up to about 23 lbs, 2.5 straight pipe.
I can't say I've noticed a 25% economy drop maybe.....8% :)
I always fill up at Shell using their Ultra Diesel and I use 100ml of Crappy Tire's Diesel Additive on every fill up. I use Shell Rotella 10W40.
I would say 30-40% of my driving is on snow covered roads, and I'll rarely take it up to redline, most of my driving is highway driving keeping it between 85 and 110 kmph. When I fill up, I always fill the tank right up to the top pushing the air vent button inside, which usually adds a good 2-3 minutes to my fill up and a few bucks more on the bill.... I plug my cars block heater into a timer at night, it will heat the car about 4 hours before I wake up to go to work.
All this being said, I always see 800 a tank I'm sure I could get up to 900 - 950, but I don't know how far into the red I can take the fuel gauge before I have to get out and push.
Cheers from Ontario.
-
great answers and thanks for the quick replies. i forgot to mention that i live in md and it is bitter cold right now but the last tank of fuel the temps were between 30-45 degrees. I also have a 2.5 inch turbo back straight exhaust and k and n drop in filter along with the increased boost and turned up fuel. I also plug the car in at night and let it warm up for about 10 minutes before i go to work. I know the idle time hurts mpg average so i am considering that.
Kepp the info coming
-
Audi 80 1,6 TD 170hp. Usually 5,7-6,2 litres/100km @ full tank(~38-41MPG) Used all the hp:s :lol: Best one tank was 5,1 litres/100km, ~46MPG
-
1.9AAZ, No mods, On my last full tank...around 500km on 50Liters...Not to fuel efficient
-
I live in AK so temps nowdays are -15F, 10F, sometimes it stays -40F for a few days straight dropping to -55F once in a while.
MPG got down to 33 'till I retarded the timing a bit now it's 38-41mpg.
Also a couple weeks ago I started running delo 400 10w-30 onstead of 15w-40.
-
Florida weather:
(A bitter cold 55 right now!!)
Stock motor, Large K&N intake, and 19 PSI (MBC) otherwise stock. 1985 Jetta T3 TD.
as high as 41.6 (Trying to use the upshift indicator... some of the time!)
and as low as 34-35 MPG (Trying to bury every honda product in diesel smoke)
I also cannot cruise the highway (most of my driving) at any less than 70mph. Its florida, and you will get run over in the slow lane doing 60 in a 50 zone....
But I bet if I could drive one whole tankful like my dad drives, I could easily (?) see the 45-49 MPG many report (Many over 50 years old, that is!)
nothing personal, but I gotta GO!!
-Brad
-
great answers and thanks for the quick replies. i forgot to mention that i live in md and it is bitter cold right now but the last tank of fuel the temps were between 30-45 degrees. I also have a 2.5 inch turbo back straight exhaust and k and n drop in filter along with the increased boost and turned up fuel. I also plug the car in at night and let it warm up for about 10 minutes before i go to work. I know the idle time hurts mpg average so i am considering that.
Kepp the info coming
I'm in Maryland too where might you be? We are so so rare around here..
Im in Carroll County with all the hillbillies in diesel pickups who think stacks give you 500hp.
Looks like ,y mileage may not be to far off then i was thinking of letting a shop double check my pump timing but with the answers im getting it looks like im close.
-
To (finally) answer your question: my 1.9l AAZ, with about 10K miles since rebuild, using dino 10W30 breakin oil, a hot pump, 20+ psi of boost, Goodyear Blizzaks, is getting about 35 miles to the US gallon.... all of it in the city, at temperatures around -15F.
And the news here in NY reports on a cold freeze at 13 degrees F.... :)
-
And the news here in NY reports on a cold freeze at 13 degrees F.... :)
Well, we don't call it the Great White North for nothing !! :wink:
Tonight's low will dip below -35C... that's -31F. Good battery, good oil, good compression, good glowplugs... no worries !
-
Good battery, good oil, good compression, good glowplugs... no worries !
You forgot the heated garage to park the car in. :lol:
-
My 1.6L NA Rabbit MK1 consistently got 49 - 51 mpg. Most of my driving was highway at 65 mph with a 5 speed. No a/c, no power anything. I'll let you know when I'm driving the Dodge caravan with the 1.6T what kind of numbers I see. Should be in the next couple of weeks. In SE Michigan they tend to keep the roads free of snow most of the time. I did not notice an increase in the winter. Remember, at least for an NA, the cold winter air packs more O2 in the cylinders for better efficiency after warm-up. Maybe my long highway drives with more O2 made up for the extra burn to get to temp. I never let mine idle to warm the engine as I had a block heater.
-
And the news here in NY reports on a cold freeze at 13 degrees F.... :)
Well, we don't call it the Great White North for nothing !! :wink:
Tonight's low will dip below -35C... that's -31F. Good battery, good oil, good compression, good glowplugs... no worries !
Great White North is an understatement with some of the blizzard photos I've seen over the years.
31 below? No doubt 31 above is bikini weather.. :)
Merry Christmas. Stay safe, stay well, stay warm.....
-
I'm commuting in a dead-stock, pretty tired 1.6 TD (almost 500,000km) running synthetics, at 100-110 km/h and get an average of 918km per tank. That drops to 804km (avg) in the winter :?
Cheers,
Andy
-
The Eco gets mid 30s in town and high 30s on the highway.
The Passat gets low 40s in town and high 40s on the highway.
-
I'm commuting in a dead-stock, pretty tired 1.6 TD (almost 500,000km) running synthetics, at 100-110 km/h and get an average of 918km per tank. That drops to 804km (avg) in the winter :?
Cheers,
Andy
Sounds basically good, but not very precise!
I assume you don't use all your fuel in the tank, so are you extrapolating?
[IMO a tired engine is not neccessarily less economic]
My last fillup on my Quantum gave me 49.23mpg UK Big gals, or 41mpg[US baby gals], or 1040 km/tank equiv.This was from a trip where 3/4 of travelling was around 70mph /3000rpm, with the rest travelling at about 45mph or a few periods of 80mph.
Recently on even split mixed driving I've been getting about 43mpg.
This compares with the official 42.1mpg urban, 38.1mpg @75mph, and 57.6mpg @ 56mph all for a waggon. The fastback and the sedan both have the better 62.7mpg @ 56mph, but the fastback is best @75mph with 44.1 mpg official.
On Saturday I shall repeat the trip, and try to run the car at 56mph to see if I can match my other QuantumTD waggon's best of 62mpg
-
I'm commuting in a dead-stock, pretty tired 1.6 TD (almost 500,000km) running synthetics, at 100-110 km/h and get an average of 918km per tank. That drops to 804km (avg) in the winter :?
Cheers,
Andy
Sounds basically good, but not very precise!
I assume you don't use all your fuel in the tank, so are you extrapolating?
[IMO a tired engine is not neccessarily less economic]
My last fillup on my Quantum gave me 49.23mpg UK Big gals, or 41mpg[US baby gals], or 1040 km/tank equiv.This was from a trip where 3/4 of travelling was around 70mph /3000rpm, with the rest travelling at about 45mph or a few periods of 80mph.
Recently on even split mixed driving I've been getting about 43mpg.
This compares with the official 42.1mpg urban, 38.1mpg @75mph, and 57.6mpg @ 56mph all for a waggon. The fastback and the sedan both have the better 62.7mpg @ 56mph, but the fastback is best @75mph with 44.1 mpg official.
On Saturday I shall repeat the trip, and try to run the car at 56mph to see if I can match my other QuantumTD waggon's best of 62mpg
Well, I took the identical trip yesterday and tried to keep around 55 to 60mph. Filled up the tank and got 46.8mpg. [Imp.] I expected something nearer mid 50's . I'm very disappointed. :shock: Even allowing for slight variations on filling up, I'd expect at least 50mpg. I wonder if its the injectors. Maybe the pump doesn't advance as much as it should at 2500 compared with 3000rpm
-
last tank i got 35 mpg but i was driving highway at 75-85 the whole time and had four wheels mounted with tires on the ride home. The beginning of that tank was around town driving
-
had four wheels mounted with tires on the ride home.
Haha, I always have four wheels on mine, hehe, I know what you ment though.
I had a one gallon fuel tank on the floor with quarts marked on it. Driving 55mph I got 10 miles per quart, so 40mpg. I slowed down to 45mph and did 12.8mpQ, or 51.2mpg. That's assuming my odometer is accurate, but it still shows the difference of driving fast or slow. This winter I get 38-40mpg.
-
i am from portugal.
golf MKII with a rebuilt stock n/a mechanical converted to turbo,1.5 bar on k24,removed intermediate silencer,upped fuel and cut lda pin.
usually goes 900/1000 a tank
-
Just thought I'd bring this one back up to post on my experience with winter fuel. I never kept a log of my fuel economy until I got my '94 this spring.
In summer and early fall it averaged about 43 mpg US. Now with winter fuel I'm down to an average of about 37 mpg US, a 14% drop. Would be curious what kind of mileage drop others experience in winter.
-
great answers and thanks for the quick replies. i forgot to mention that i live in md and it is bitter cold right now but the last tank of fuel the temps were between 30-45 degrees. I also have a 2.5 inch turbo back straight exhaust and k and n drop in filter along with the increased boost and turned up fuel. I also plug the car in at night and let it warm up for about 10 minutes before i go to work. I know the idle time hurts mpg average so i am considering that.
Kepp the info coming
I'm in Maryland too where might you be? We are so so rare around here..
Im in Carroll County with all the hillbillies in diesel pickups who think stacks give you 500hp.
Looks like ,y mileage may not be to far off then i was thinking of letting a shop double check my pump timing but with the answers im getting it looks like im close.
My Blue Bunny is happily hopping around up here in Hagerstown Md. comuting between Fredrick in the Summer on I-70 running 50-52 mpg every tank running between 65-75 mph climbing South mountain and Braddock mountain everyday. It's just a rebuilt 1.6 N/A with a 5 speed .71 high gear,no modifiations at all other than .020 rebore. With the .76 highgear it did between 45-47 mpg. Honestly it doesn't seem to matter how fast or slow you go with it the mileage doesn't vary more than 1-2 mpg at the very most. I can't wait to see what the new T/D will be like this Summer pulling the mountains and yes i do have a EGT gauge with the Spruce thermocouple to keep an eye on it. Probably ougtht to have my 60 year old ass kicked for even thinking about taking the perfect little N/A out, but I want to play too. When I grow up though I'm gonna get a Jetta :lol:
-
My 1.6L NA Rabbit MK1 consistently got 49 - 51 mpg. Most of my driving was highway at 65 mph with a 5 speed. No a/c, no power anything. I'll let you know when I'm driving the Dodge caravan with the 1.6T what kind of numbers I see. Should be in the next couple of weeks. In SE Michigan they tend to keep the roads free of snow most of the time. I did not notice an increase in the winter. Remember, at least for an NA, the cold winter air packs more O2 in the cylinders for better efficiency after warm-up. Maybe my long highway drives with more O2 made up for the extra burn to get to temp. I never let mine idle to warm the engine as I had a block heater.
You're right about the o2 making a difference, I've noticed lately my Rabbit which sounds just about like your's, {1.6 N/A 5 speed and no extras} has seemed noticibly peppier lately since it's been a lot colder and less smoke too, other than starting. Of course this is after it warms up though but I can't say mine has been any easier on fuel though but no harder on it either. But it does deffinately seem to be quicker than in the Summer now that it is in the 20F range at times. It makes me wonder how my turbo motor would act now if it was in :wink: Another funny thing is the transmission seems to work better now than in the summer which has had Amsoil gear oil in it since last Spring when I put new bearings in it. It doesn't make sense, I've read that it might be a little too slippery for the synchros which I didn't change by the way and didn't see a reason to. I think I'm gonna use the Jetta 5 speed that came with the engine with regular 80-90 when I put the motor in, it seems to shift fine test runing the engine.
-
if you want more millege try SEA FOAM....in canada you can get it at any napa part stores or crappy tire i was getting 35mpg then i did a sea foam treatment and it got me 47mpg after a good cruise down the highway blowing all the crap out...now to clairify....sea foam is a super cleaner...i took my cold air intake off and trickled it into the turbo.....in the oil and put sum in the fuel....it cleans everything out fast need more info on it just pm me..