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Go Back   TDIClub Forums > TDI Model Specific Discussions Areas > VW MKIV-A4 TDIs (VE and PD)

VW MKIV-A4 TDIs (VE and PD) This is a general discussion about A4/MkIV Jetta (99.5-~2005), Golf(99.5-2006), and New Beetle(98-2006). Both VE and PD engines are covered here.

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Old June 6th, 1999, 16:28   #1
dzcad90
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Location: Joliet, IL USA
Default Average shift point & MPG

Just curious, where does everyone shift? Usually I shift at 3000, and get about 42MPG (I do a lot of town driving).

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Old June 6th, 1999, 16:34   #2
dzcad90
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Default Re: Average shift point & MPG

I forgot to include in the above post that I have a '97 Jetta TDI.
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Old June 6th, 1999, 16:42   #3
BRUSSELS BELGIAN
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Join Date: May 1999
Location: Aston,Pa. USA
Fuel Economy: 70.6/ 51/ 38
Default Re: Average shift point & MPG

You may call me an old granny, but I shift around 2200 rpm. Don't forget this engines' peak torque occurs at 1900 rpm. As for mileage: 40-42 around town; 46 in mixed driving; 55-61! on the highway.
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Old June 6th, 1999, 18:24   #4
mickey
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I drive mostly on the highway, with about 25% in-town. Before the Wett chip, I'd average 47 mpg shifting at 2200 rpm. Sometimes, if I were in a really jaunty mood, I'd race around shifting a 3000 rpm, and still get 47 mpg. Now, with the Wett chip, I shift at 4000 rpm as often as not, and average 45 mpg. It doesn't seem to make that much difference.

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Old June 7th, 1999, 07:41   #5
riddei
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Join Date: Feb 1999
Location: Northern New England (barely)
Fuel Economy: 52/47/40
Default Re: Average shift point & MPG

Hi all: I have written this before but felt the urge to write again. I have spent a lot of time trying to determine the best point to shift for fuel mileage. My results?... I actually get slightly better mileage if I shift at a higher RPM than a lower. I tried to shift at (or below) 2,000 RPM's and it did absolutly nothing for mileage. I now don't pay any attention to where I shift. If I am entering the freeway I'll bring it up to 4,000 RPM's (to the point of leaving a puff of smoke out my exhaust). Normal driving 2,500 - 3,000. And agressive driving 3,000 - 4,000. I find that the biggest thing that kills my mileage is how fast I drive on the expressway. I used to only drive at 60MPH in a 55. I could expect over 47 - 48 MPG. I know drive the speed of traffic (usually keep it below 80 in a 65). I have seen my mileage drop to 45 MPG or so. I have a 97 Passat TDI. Thanks - Ian.
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Old June 7th, 1999, 10:22   #6
CJ Pugliese
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Location: Rancho Santa Margarita, CA 92688
Default Re: Average shift point & MPG

Most of my miles are from freeway commuting at a speed of 65 MPH with the cruise control on. Sometimes at night on the way home I'll do 80 or higher. I usually shift at 2000-2200 RPM's and in the 6000 miles that I have put on my Jetta TDI I have only averaged 43.6 MPG. I was expecting better because of the constant speed that is associated with freeway driving. I don't know how anyone out there in TDI land is getting close to 50 MPG.
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Old June 7th, 1999, 10:30   #7
mickey
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Default Re: Average shift point & MPG

CJ, I assume you have a 5-speed, not an automatic. If that is the case, then I'd say your mileage is unusually poor. The worst I ever got was 44 mpg, and I had to really work to get it that low.

-mickey
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Old June 7th, 1999, 10:54   #8
coondog
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Join Date: Apr 1999
Location: ny
Default Re: Average shift point & MPG

I commute 48 mi. one way to work, most of it 55-65 mph on back roads and about 15 mi. on the 4-lane at 72 mph(why 72mph?..who knows!)
and on the way home at midnight I keep it 55-60 mph all the way because the deer out number the cars after dark! I (almost!)always shift between 2200-3200 rpm and the worst mileage I got was 48.5 on my first tank. Now with 4800 miles on the clock the best is 52 mpg and other than the first tank all have been over 50 mpg. Just started using the a/c regularly on this tank but it does not look like it is affecting the mileage much judging by the gauge. Oil consumption has been nil. I've used Amsoil cetane boost and diesel fuel modifier starting with the second tank of fuel. Oh-yeah, 1999 A4 Jetta GL TDI.
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Old June 7th, 1999, 13:24   #9
mickey
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I doubt there's much difference between the different TDI motors unless one of them has a problem. Peter, I think you're just about a worst-case scenario. These cars really start to drink fuel above 75 mph or so (relatively speaking) and stop-and-go driving is never good for fuel economy. Those folks with Passat TDIs can probably expect a bit lower fuel mileage simply because they're bigger, heavier cars. NB drivers, like me, can expect worse mileage on the freeway than Jetta/Golf drivers because of the relatively poor aerodynamics of the Beetles. We have to make sure we're comparing apples to apples, and there are a lot more factors involved than you'd think at first glance. I'll say one thing for sure: All properly functioning TDIs get excellent fuel mileage, but there seems to be a lot more variation than among gas engined cars. I think the biggest single factor is climate! Gas cars will get slightly worse mileage in the winter, but very cold weather seems to make a much bigger difference to diesel engines. (As you would expect. Diesels love heat!)

-mickey
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Old June 7th, 1999, 13:53   #10
Tazzman
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Join Date: Apr 1999
Location: Great White North ( south of N. Bay )
Fuel Economy: 78/65/55
Default Re: Average shift point & MPG

Well here we go again
Im a easy shifter. 2,000 to 2,300 rpm's

At 2100 rpms Im doing 100 k's
got 65 mpg on the weekend.
Im aver. 60 plus mpg
I keep my speeds under 100k's
The speed traps around here will kill yea
other wise, one way or the other.

PS
this is canadian figures

[This message has been edited by Tazzman (edited June 21, 1999).]
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Old June 7th, 1999, 14:40   #11
annie
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Location: centereach, ny, us
Default Re: Average shift point & MPG

Hi new jetta tdi..just hit 1000 miles today
Drive a combo of highway and lots of stop and go, traffic too. Even highway is maybe 22 miles then I am stopping. It seemed at first I was about 45 miles per gallon. Today I got gas I am filling up before I hit half tank and it worked out to 42.72mpg. I shift around 2000-rpms depending. I'm on Long Island, NY.
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Old June 7th, 1999, 15:42   #12
Boswell Bear
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Default Re: Average shift point & MPG

Have a new (7600 miles) GOLF. Getting 53 mpg like clockwork. Originally shifted at about 3k but now shift at about 2K. No real difference. Coming from Dodge Cummins background. Susupicions about all this: there a a huge number of facotrs that enter into it all. Probably most likely is driving style (speed, accelleration, etc.) followed by things like tire pressure, road types (hilly, flat, etc.), wind conditions, etc. Plus, as a computer nerd myself, I wouldn't be too surprised to learn that the chip may have minute variations that have an effect.

Personally, I drive like an old fudd - hell, I AM an old fudd - keep it below 70 (I can hear you guys cringing out there - I stay in the slow lane, dudes)and like that. Also, spend the vast majority of my time on the highways and long trips (40,000 miles per year).

As someone up above said, even the worst case is getting better mpg than anyone else we know...if you are enjoying the wheels, you got to be doing it right.
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Old June 7th, 1999, 20:18   #13
Peter Cheuk
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Join Date: Aug 1998
Location: Daly City, Calif., USA
Default Re: Average shift point & MPG

Must be doing it right because I'm enjoying the heck out of my wheels! Yeah, I'll admit that I drive too agressively for good mileage. Maybe one day I'll decide that mileage is more important to me than fun, but, I don't foresee that anytime soon. The torque, especially with the Hopa module is like a drug: Keeps you coming back for more and you keep doing it even though you know it's bad. Somebody help me! I've been bitten by the torque bug and I can't help myself!

------------------
'98 Jetta TDi with Hopa Module and custom short shifter
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Old June 7th, 1999, 20:26   #14
N Dennis
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Default Re: Average shift point & MPG

CJ, Peter and myself all have one thing in common when it comes to owr lower mileage: We all live and play in the great state of California. Home of reformulated gas and diesel fuel. On 3 tanks of diesel: 45mpg, 42mpg; and 39mpg(mostly city). The enviro-****s including Mr. Gore and the Sierra Club are all pleased that we Californians are required to pay top dollar for **** fuel that is poisoning our water supplies.
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Old June 7th, 1999, 20:44   #15
mickey
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Utah county, south of Salt Lake, has been required to use oxygenated gasoline during the winter for the past several years, due to excessive pollution during winter temperature inversions. (Unlike SoCal, our big smog problems occur during the winter. It can be 25 degrees, foggy and smelly in the valleys and 40 degrees under glorious sun up at the ski resorts, on the same day! That's why I work in Park City!) Anyway, a recent study has concluded that the crappy fuel has no effect on the pollution levels in Utah county. What small positive effect is gained through use of the crappy gas is negated by poor fuel economy. Why do government types refuse to see the obvious? If they really want to reduce emissions they'd cut the taxes on diesel fuel down to nil and tax the hell out of big, fat sport utilities!

-mickey
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