www.tdiclub.com

Economy - Longevity - Performance
The #1 Source of TDI Information on the Web!
Forums Articles Links Meets
Orders TDI Club Cards TDIFest 2016 Gone, but not forgotten VAG-Com List Unit Conversions TDIClub Chat Thank You




Go Back   TDIClub Forums > VW TDI Discussion Areas > TDI Fuel Economy

TDI Fuel Economy Discussions about increasing the fuel economy of your TDI engine. Non TDI related postings will be moved or removed.

Reply
 
Thread Tools
Old December 16th, 2009, 20:03   #1
Rod Bearing
Veteran Member
 
Join Date: Sep 2007
Location: Fort Worth
TDI(s): Several
Default 3 year comparison, 2006 TDI Jetta -vs- 2006 Prius

My very best friend in the world has a 2006 Prius, bought 4 months before my 2006 TDI Jetta.

He has kept meticulous record of his Hybrid Prius fuel economy as have I in my Jetta TDI.

His car has 107,902 miles as of today, and has a lifetime average fuel economy combined of 38.56 MPG.

My Jetta has 91,412 miles and a lifetime average of 40.07 MPG.
Rod Bearing is offline   Reply With Quote
Old December 16th, 2009, 20:16   #2
roadhard1960
Veteran Member
 
Join Date: Feb 2004
Location: Covington, Ga.
Fuel Economy: 48 mpg
Default

My friend replaced the battery pack in his first generation a few months ago, actually first model year Prius. I think he spent close to $5,000. He has about the same amount of miles as my car. So far I have done timing belts, maf and egr as engine related service. Fuel milage is similar.
__________________
2003 Jetta wagon GLS, 5 Speed, Alligator tune, 34 psi tire pressure, 49.1 US mpg first 35k, 50 next 31.5k, 50.4 next 36k miles, cleaned intake twice and polished end runners last time, Mobil Truck & SUV or Delvac. Koni FSDs, VWs since 1977. Sprint 520 Nozzles for Christmas 2007. Ecodes with fogs and Eswitch. 547,000 miles and counting, original turbo. 2004 Dodge 2500 Cummins HO.
roadhard1960 is offline   Reply With Quote
Old December 16th, 2009, 20:53   #3
soldierguy
Veteran Member
 
Join Date: Apr 2004
Location: California
Default

Quote:
Originally Posted by Rod Bearing
My very best friend in the world has a 2006 Prius, bought 4 months before my 2006 TDI Jetta.
He has kept meticulous record of his Hybrid Prius fuel economy as have I in my Jetta TDI.
His car has 107,902 miles as of today, and has a lifetime average fuel economy combined of 38.56 MPG.
My Jetta has 91,412 miles and a lifetime average of 40.07 MPG.
Your friend seems to be an ideal candidate for a diesel, having averaged nearly 36,000 miles per year. I'm assuming that he does mostly highway driving because of the high average miles per year. Hybrids get stellar mileage in the city (assuming the driver is not hot-rodding around), but with extended highway miles, their mileage tends to be quite a bit off their EPA ratings. Even so, 38+ mpg average over 100,000+ miles is pretty darn economical regardless of what you're driving.

Speaking of the EPA ratings...an 06 Prius's window sticker would have shown 60 mpg city, 51 highway, 55, combined. The new lower estimates ('08 and later) would put the 06 Prius at 48 city, 45 highway, 46 combined. An 06 Jetta TDI: 36/41/48 (old sticker), 30/37/33 (new formula). So who is getting closer to their advertised fuel economy? Hmmm...

EPA ratings were taken from the fueleconomy.gov website that allows you to compare the old vs new ratings for a given car produced before the new ratings went into effect.
__________________
Soldierguy the SuperCommuter
'15 Jetta TDI S DSG
soldierguy is offline   Reply With Quote
Old December 21st, 2009, 05:39   #4
DZL4LYFE
Member
 
Join Date: Mar 2009
Location: Marrero, LA
Default

To be perfectly honest, even the new ratings for the 06 TDI are out of whack. 30 city? are you serious? I won't say I drive all stop and go traffic, but i've never averaged lower then 37.5 over an entire tank doing heavy city driving. On the other hand....37 highway is just ridiculous. I took a 3500 mile round trip to northern minnesota over the summer and had the cruise set to 65 all the way there. I never averaged under 50 mpg per tank with the best being 55.3 mpg. I could have roared down the highway at 80+ and still got better then 37 lol.
__________________
2006 Jetta TDI DSG- bone stock
grey leather, sunroof, dual climate control, heated seats, alloy rims.

DZL4LYFE is offline   Reply With Quote
Old December 22nd, 2009, 15:03   #5
coalminer16
Veteran Member
 
coalminer16's Avatar
 
Join Date: Dec 2008
Location: Central Wisconsin
TDI(s): Golf 2004
Fuel Economy: as good as 58 (over 700 miles) and as low as 30 over the same route
Default

To be fair it is possible being fully loaded with a trailer doing 80 in the summer heat with the AC fully on to get 23 mpg. It is the same car that has gotten me 58 mpg. That was hauling my father home after a very bad bike wreck and him telling me he was too hot and to drive faster (1500 miles to get him home). But other then that we have always been mid 30's or higher.
__________________
Shade Tree Mechanic "I'm too shady to know anything"
1981 Rabbit car 1.9aaz, 5 spd, 1981 Caddy VW truck diesel, 2004 Golf-2 inch lift, -fixing, 2005 Golf-2 inch lift - totaled twice and fixed twice, 2005 Jetta Wagon - 2 inch lift
Quote:
Originally Posted by rmchambers
I really had no idea that VW dealerships were so awful to go to, they sound like undertakers cos everything that goes in there winds up dead.
coalminer16 is offline   Reply With Quote
Old December 23rd, 2009, 08:01   #6
RalphVa
Veteran Member
 
Join Date: Oct 2009
Location: Virginia
TDI(s): Jetta
Default

Automobile magazine pitted a Jetta TDI against a Prius in about 2006. The TDI won on mpg.

Think it also won on overall rating of the driving experience.
__________________
Ralph
The natural gardener
God's original intent
RalphVa is offline   Reply With Quote
Old December 23rd, 2009, 08:34   #7
Dunno513
Veteran Member
 
Dunno513's Avatar
 
Join Date: Feb 2006
Location: Mirror Lake, NH
Fuel Economy: 44.5 lifetime
Default

I think the major point isn't that the Prius isn't a good car, it's just that the Prius got all the headlines while the TDI went unnnoticed. Yet when all the chips fell, the two were a very close match with the TDI edging out the PRIUS.

I'm guessing that with the MPG charted, the VW saw a slow increase while the Prius saw a slow decline due to battery performance.

I would like to see the maintenance chart and cost comparison to see who really won, or if that was a draw as well.
Dunno513 is offline   Reply With Quote
Old December 23rd, 2009, 11:07   #8
ratsalad
Newbie
 
Join Date: Dec 2009
Location: Grasston
TDI(s): 2000 Golf
Default

I am new to this group, but I had to chime in on this. I have always been interested in driving vehicles that get better fuel economy so at one time, I had a Prius. It was a nice car, but it was $25,000 new. It got good fuel mileage, but it wasn't spectacular. I had the car for about three years before getting a minor accident and having it totaled.

So I received the insurance settlement and was looking for a new car which after some research and looking around turned out to be a 2000 Golf TDI which ended up costing $4200. The only problem that popped up after driving the car for a while is the check engine light and seemed to be related to the turbo, but actually turned out to be a loose vacuum hose. Once I figured the car would be reliable enough, it was converted to run on straight vegetable oil.

I guess you could say that I am happy for the mishap, because if it hadn't of happened, I wouldn't be driving a car that essentially gets as good or better fuel mileage on vegetable oil than a Prius does on gas and I can even haul a trailer. While I haven't checked my fuel economy on VO, my conbined average for diesel was in the 40's while the Prius was in the high 30's.
ratsalad is offline   Reply With Quote
Old December 23rd, 2009, 11:19   #9
Fix_Until_Broke
Veteran Member
 
Fix_Until_Broke's Avatar
 
Join Date: Aug 2004
Location: Menomonee Falls, Wisconsin, USA
Fuel Economy: 75.0/53.0/38.4
Default

Quote:
Originally Posted by Rod Bearing
My very best friend in the world has a 2006 Prius, bought 4 months before my 2006 TDI Jetta.

He has kept meticulous record of his Hybrid Prius fuel economy as have I in my Jetta TDI.

His car has 107,902 miles as of today, and has a lifetime average fuel economy combined of 38.56 MPG.

My Jetta has 91,412 miles and a lifetime average of 40.07 MPG.
From an energy efficiency standpoint, the Prius came out better.

Gasoline = ~125,000 btu/gallon
Diesel = ~140,000 btu/gallon

So the diesel vehicle would need to get ~12% better mileage (~43 MPG in this case) than the gasoline vehicle to realize the same overall energy efficiency/consumption.

However - the vehicles are not the same (Jetta is heavier and larger than the prius therefore consuming more energy to start with) so I'd bet that if you put a TDI in the Prius or vice versa that the differences would be larger between the two MPG figures, and if I had to guess, the TDI would come out on top.

Any idea on what the total cost of ownership is on the two vehicles along with their present resale value? That would be another interesting comparision.

Either way - good data point and thanks for sharing!
__________________
03 Jetta, Cat 2u, DG Steel SP w/MOGolf Mod, 3"DP, 4"EXH, EaBP100 Bypass, Euroswitch, ECodes, Driving Light, PD Lift Pump, R520's, RC5,RC6, TDTuning, Malone, ScanGaugeII, 3" TIP, 2" TOP, HE221W Compounded with GTC1444VZ, 6 Bar MAP, VR6 MAF, Vented Fender Liner, Battery Cover Mod, 11mm, Monster Mats, 215/55/17 (27.9/53.0/75) Monthly MPG Links, Euro Trunk Latch, IDParts RSB, SDI or ALH Intake, ARL Ceramic Pistons, Rosten Rods, DRW, Wavetrac, SBC, FSD's, Beef Springs, Rebuilt Head, Recaro's, Colt II, DG Sigma 6, RMT200
Fix_Until_Broke is online now   Reply With Quote
Old December 23rd, 2009, 11:28   #10
thebigarniedog
Master of the Obvious
 
thebigarniedog's Avatar
 
Join Date: Oct 2007
Location: Fail Command (Central Ohio)
Default

Quote:
Originally Posted by Rod Bearing
My very best friend in the world has a 2006 Prius, bought 4 months before my 2006 TDI Jetta.

He has kept meticulous record of his Hybrid Prius fuel economy as have I in my Jetta TDI.

His car has 107,902 miles as of today, and has a lifetime average fuel economy combined of 38.56 MPG.

My Jetta has 91,412 miles and a lifetime average of 40.07 MPG.
The 2005.5/2006 tdi mk5 is much maligned for legitimate reasons. The current resale values suck due to the price point of the 2009/10s. The cam/oil issue is at best annoying. The fact that the car was equipped with the okay 5 speed manual tranny (state of the art for 1991), instead of the 6 speed manual is also a big negative IMHO. Couple these problems with the fact that the mk5 Jetta is unabashedly an ugly design (think of the poor kids that are stuck riding in this design ) and you have a car that very few people want.

If I had to make a prediction though , I betcha that the 2005.5/2006 will hold it's own in the long run. Think of it this way, when the price point for this car hits around $8(k) or less in the next couple of years (I give it 2 years for this to occur), the cost of adding the Frank06 prototype head fix and the Scott Dewitt prototype drop in 6speed will make this car an all around winner. A PD engine with a 6 speed manual for around $12(k) --- yep this could turn out to be one of the best tdis available . Now if only there was a fix for that VW ugly stick it was hit with .
__________________
When interviewed about why no diesel for the new F150, Ford responded to effect that diesel makes no sense in the 1/2 ton market. That brilliance should be repeated in every Ram 1500 eco-diesel commercial.

OCD TDICLUB MEMBER # 1
thebigarniedog is offline   Reply With Quote
Old December 24th, 2009, 01:55   #11
chessmyantidrug
Member
 
Join Date: Dec 2009
Location: Wichita Falls, TX
TDI(s): 2006 Jetta
Default

Quote:
Originally Posted by Rod Bearing
My very best friend in the world has a 2006 Prius, bought 4 months before my 2006 TDI Jetta.

He has kept meticulous record of his Hybrid Prius fuel economy as have I in my Jetta TDI.

His car has 107,902 miles as of today, and has a lifetime average fuel economy combined of 38.56 MPG.

My Jetta has 91,412 miles and a lifetime average of 40.07 MPG.
I would assume the average price of each fuel would be pertinent information. I believe diesel is around 20 cents higher on the gallon nationwide right now. So ...

100000 miles / 38.56 miles per gallon = 2593.36 gallons * $2.584 = $6701.24

100000 miles / 40.07 miles per gallon = 2495.63 gallons * $2.783 = $6945.35

I pulled those prices off AAA's Daily Fuel Gauge Report, which has the current national averages. I'm pretty sure over the past three years the average price of diesel is much higher than 20 cents. In other words, spent less per miles than you did.
chessmyantidrug is offline   Reply With Quote
Old December 24th, 2009, 18:31   #12
pakm
Newbie
 
Join Date: Sep 2009
Location: Texas
TDI(s): 09 Jetta TDI
Default 09 fuel mileage

My wife left for the west coast the 1th of Nov. From south east houston Tx. She topped off the fuel tank in San Antonio. And call me from Fort Stockton to complane about there being no place to eat, nothing to see etc. But she did say she got 26 MPG. in our 09 Diesel Jetta.-----At a speed of around 100MPH. I figured she was taching about 3,000 or so.
I case anyone doesn't know, that is the most nothing bunch of country in the US. YOu can see 15 miles in any direction.
pakm is offline   Reply With Quote
Old December 25th, 2009, 18:15   #13
velociT
Veteran Member
 
velociT's Avatar
 
Join Date: May 2006
Location: Not Austin, TX
Default

Yeah for those reading who haven't driven I-10 between basically 50 miles west of San Antonio and El Paso, Tx.... You can drive 100mph and still be passed frequently.

The highway is in very good condition, speed limit is something like 85, and it seems the troopers out there don't bother you unless you are in a junker going 100+mph.

In 2004 I personally passed two DPS troopers on that stretch about 10 miles apart during the day on cruise at 120mph in a sports car.

Neither pulled out on me.
__________________
TDT for PD Mafia Member #002
Then: 06 Jetta TDI 5M *sold*
Now: 17 Ram 3500 CTD, 87 M35A2C
velociT is offline   Reply With Quote
Old December 25th, 2009, 20:30   #14
Dodoma
Veteran Member
 
Join Date: Mar 2004
Default

Volt will deliever 100mpg. VW diesel hybrid will deliever 70mpg. At present Prius and Jetta TDI deliever almost identical mpg. However it is the cost of ownership over a longer period, such as ten years, that will show which one is economical. Unfortunately not many of us keep these cars for such long period. Regarding build quality, VW beats Prius soundly.
Dodoma is offline   Reply With Quote
Old December 26th, 2009, 06:47   #15
roadhard1960
Veteran Member
 
Join Date: Feb 2004
Location: Covington, Ga.
Fuel Economy: 48 mpg
Default

Volt will deliver high mileage if you don't go far. What will it deliver when you drive it to Grandma's house which is 200 miles away? I could not easily find the EPA mileage rating. I see people drive those go carts on the interstate. The "Smart Car" at 33-41 mpg is not that great but it does not look like it belongs on the highway. I suppose for many people who drive short distances to work and who have charging bays at work the Volt will be great. I have only seen one charging bay at all the garages I have parked in.
__________________
2003 Jetta wagon GLS, 5 Speed, Alligator tune, 34 psi tire pressure, 49.1 US mpg first 35k, 50 next 31.5k, 50.4 next 36k miles, cleaned intake twice and polished end runners last time, Mobil Truck & SUV or Delvac. Koni FSDs, VWs since 1977. Sprint 520 Nozzles for Christmas 2007. Ecodes with fogs and Eswitch. 547,000 miles and counting, original turbo. 2004 Dodge 2500 Cummins HO.
roadhard1960 is offline   Reply With Quote
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -7. The time now is 22:26.


Powered by vBulletin® Version 3.8.5
Copyright ©2000 - 2019, Jelsoft Enterprises Ltd.
Copyright - TDIClub Online LTD - 2017
Contact Us | Privacy Statement | Forum Rules | Disclaimer
TDIClub Online Ltd (TDIClub.com) is not affiliated with the VWoA or VWAG and is supported by contributions from viewers like you.
1996 - 2017, All Rights Reserved
Page generated in 0.21710 seconds with 10 queries
[Output: 130.09 Kb. compressed to 109.13 Kb. by saving 20.96 Kb. (16.12%)]