Ellery
Well-known member
you all can disregard my last post about break in - wrong forum for it, and I have discussed it in the other forum -
Ellery said:Good - I have no intention of really messing with the DRG's "manual mode" - I find it strange and awkward to use anyway - some folks on this thread recommended skipping gears at times, but I think with the automatic it would be over the top perhaps, again, most of my driving anyway is highway, so likely no big effect.
I am just wondering if my wagon will really be able to get 50mpgs too? - I mean, my computer rated me a trip avg of 49 the other day to work, but most times its more like 44 and when I do my math today after refilling (just till the pump shut off automatically) I got 41.6mpg calculated - but I think I will keep tracking it now, I think it will get better with my more careful driving and perhaps a tad more tire pressure than the manufacturer.
TedKurtz said:<SNIP>The tank has a vent tube, and filling to the vent means filling it till fuel spills out that tube onto the ground. <SNIP>
Ted
However you decide, do it consistently. I would not recommend topping, even as a lot of folks document on this web site that they in fact do it. As you read the technical manuals, and perhaps do searches on this august web site, the real reason for the extra volume (15.5 gals for a max capacity of 14.5 gals) is because oem engineering allows for EXTREMES in temp, aka, ROOM for the fuel to expand and contract and EPA regulations.Ellery said:Also, I have recieved mixed signals on here - due I top off my car and how do I go about doing that? Or should I just avg what I get when the pump clicks off?
ruking said:However you decide, do it consistently. I would not recommend topping, even as a lot of folks document on this web site that they in fact do it. As you read the technical manuals, and perhaps do searches on this august web site, the real reason for the extra volume (15.5 gals for a max capacity of 14.5 gals) is because oem engineering allows for EXTREMES in temp, aka, ROOM for the fuel to expand and contract and EPA regulations.
Because our DIESEL fueled care share the same tank/filler with GASOLINE powered cars that require the expansion room. Fill it as full as you like, it is very very unlikely to expand enough to overflow.
I just let it fill untill the "first click off", unless of course it clicks off way below expected fill. The only time I would consider so call "topping the tank" is to get a tad extra range when I know I will burn off app 1 gal right away. (40-50 miles)
I do keep a pen and ink log book. On my 2009 where I do have a MFD, the pen and ink calculations really do not deviate all that much from the MFD. You can of course do it "inconsistently," but don't be alarmed if your calculations appear... inconsistent.
http://forums.tdiclub.com/showthread.php?p=2857769#post285776940X40 said:500 miles burning 13 gallons =38.46 mpg Example 'first click'
500 miles burning 13.5 gallons =37.03 mpg. Example 'full to the brim'
1.43 mpg discrepancy in the above example. Either method can be used, but better accuracy will result when you top off the tank in the same exact manner the second time as you did the first time.
However you choose to fill the car, do it the same way every time or you risk inducing an error into your calculations. This can be overcome by increasing the amount of tanks you average the mileage into.
For instance:
Over the first 20,000 miles of driving, my manual 06 Jetta averaged 42 mpg for the entire distance.
I top off each tank to the brim, but I also keep records of every tank I put through the car(s). This simply serves as a check for either method.
It ain't rocket science.... which means we don't get to blow things up....LOL
Bill
Have you read "Break In"? http://forums.tdiclub.com/showthread.php?t=252501Ellery said:Also, please refer back to my question prior to my recent topping off question - the one where I ask about the apparent conflict of the "breaking in priciple" and lowest possible RPM's for best fuel efficiency....thanks.
Worry about break-in for the first 10,000 or so miles so that you get good mileage after that. It can take 30,000-40,000 miles to reach peak cylinder compression numbers.Ellery said:Also, please refer back to my question prior to my recent topping off question - the one where I ask about the apparent conflict of the "breaking in priciple" and lowest possible RPM's for best fuel efficiency....thanks.
You might want to look at a couple of other places 1. on this web site and that are the monthly "competition" figures. Jan/Feb 2010 being the latest. 2. The Fed has a site also http://www.fueleconomy.gov/feg/sbs.htmEllery said:Also, given my car is a wagen...what is a realistic best case scenario gas mileage for me without any modifications (nozzles, chips, etc..)? I just in the past week started slowing down during my commute to 60mph/1900RPM and my mileage has apparently improved greatly - my first fill up was the other day after doing this and my avg was 41.67 (that is using the volume with the pump clicking off).
My commute is about 15% stop and go, the rest HWY on cruise - 100 miles round trip - I use Chevron diesel (which as I understand on here is good). Does around 42mpg seem a bit low? Or am I doing about what can be expected?
That the number I have read the most about 10k. My mpg's are very good now, just need to be mellow out and enjoy the ride. average is 44.40X40 said:Worry about break-in for the first 10,000 or so miles so that you get good mileage after that. It can take 30,000-40,000 miles to reach peak cylinder compression numbers.
The members here tend to keep their cars longer than most owners.....
Bill
It pains me to read stuff such as this here and while it is practically senseless to reply with the hope of containing all the butchery of fact that goes on, let me remind you that the air you breathe has closer to 79% nitrogen but what's 6% among friends?40X40 said:You are confusing marketing hype with science. According to what you just wrote we can just put air in our tires and after a time all the oxygen will leak out leaving only the nitrogen. (air is 85% N already)
This has all been hashed out many times in the past on this forum...
Depending on inhalant it could be panting, passing out, or hysterical laughter!JettaJake said:... but what's 6% among friends? ...
JettaJake said:It pains me to read stuff such as this here and while it is practically senseless to reply with the hope of containing all the butchery of fact that goes on, let me remind you that the air you breathe has closer to 79% nitrogen but what's 6% among friends?
1. Trash the K&N. It's doing nothing.Peppie37 said:2005 VW Beetle TDI getting only 40MPG changed oil use Mobil 1 Synthetic, new fuel filter and installed new K&N air filter. What else can I do
How many miles on it? manual or auto? What tire size? New Beetles came stock with larger(heavier) wheels/tires than Golf/Jetta at the base level.Peppie37 said:2005 VW Beetle TDI getting only 40MPG changed oil use Mobil 1 Synthetic, new fuel filter and installed new K&N air filter. What else can I do
Those are UK mpg correct? UK gallons are 20% bigger than US gallons, therefore:bluestifford said:HI
I live in England and I have a Golf 150 pd 2002. If I drive from a cold start on my 22 mile journey to work, half of it at 60 mph and the other half stop-start I can get 51 mpg. Some people I know with the same engine can get 55+ on long journeys doing 70 mph the whole way.