<center><img src="http://users.ev1.net/~rscsaab/audi/small%20a6.jpg"></center><p>Has any one tried the following to improve gas mileage.

1.) Replace spark plugs with the Split platinum tipped ones? It is supose to give you 2-5mpg improvement.

2.) Octane booster for long trips?

3.) The fuel line attachment called FuelMAX that is shown in all the popular science and gadget mags that apparently uses magnets to create a better and more efficient burn. Here is the web site. www.gadgetuniverse.com It is supose to improve mileage 5-8mpgs.

I am just curious if these things actually make any difference.<ul><li><a href="http://www.gadgetuniverse.com/cgi-bin/sgin0101.exe?T1=TG+224&UID=2001031007283534">FuelMAX</a></li></ul>

If there were such an easy solution, don't you think the manufacturers would adopt it?

Not really how to get more MPG,
but I read that you get more gas through the pump for the same price in the morning when its really cold.

Something about how the pump measures the amount of gas going through it is different when gas is cold, were you end up with more than the pump thinks.

Who knows if its true or not.

Gasoline is denser when its cold, and the pump measures volume. So early in the morning, you get more lbs of gasoline per gallon and thus more energy per gallon. However, all the new pumps are temperature corrected, so unless you buy from a historic site......

I'd be interested in the effect of the new plugs if anyone has experience. It is possible they could make a difference although I very seriously doubt it would be measurable.

Don't use octane boosters. They are not required. "Octane" ratings don't affect mileage, they specify the level of anti-detonation qualities of the fuel. Use premium in your 2.7T and let it go at that. If you hear detonation under hard acceleration, change brands. To increase mileage an additive would have to increase power at a given rpm. That would allow less fuel to be used.

1. X amount of power required to move the car at a certain speed and throttle opening.
2. Put in "power boosting additive".
3. More power, so now we get the same power required to achieve our given speed at a lesser throttle opening.
4. Should translate into lower fuel flow and better mileage.

Real world, gasoline chemistry is complex. Gasoline is also very "energy rich". Without resorting to dangerous and exotic chemicals and the Phd in chem required to know how to apply them and use them before they degrade. . blah blah blah, you will not get the desired result and will probably damage the fuel system which will cost far more to repair, assuming you can find someone who can actually do it, than any savings.

On the magnetic thingy, same deal, I have doubts that there would be a benefit because the manufacturers would be on that like you can't believe. They are spending billions to get the mileage up and meet cafe requirements.

Just my opinions, I could be wrong. . .

Bob

I had those plugs in my Saturn for a while. The plugs in that car would be burned looking when I took them out and if I left them in too long they would start to miss under certain conditions.

So once time when I was replacing the plugs earlier than scheduled I decided to try the split plugs. I figured any improvement in spark would help my plugs last longer.

I don't know if they even did that, and they definitely didn't help my gas mileage in that car. I don't know that an Audi would be any different.

Trying an octane boost won't cost much. Frankly, it shouldn't work, as Audi's computer isn't calibrated to take advantage of any octane level over 91.

Inflate all your tires to the max pressure listed on the sidewall. That could get you 1 or possibly 2 mpg. In the short time my summer tires were on this winter, I found I was getting better mileage than on the stock Conti's. Odd, eh?

I got killer gas mileage the other day by simply driving 65 instead of my usual 75 or so. I usually get 23 or so on the highway, and I got 25+ on that trip.

Lighter is always better for gas mileage although there really isn't any way to cut the weight of the car without making your car less luxurious. More aerodynamic is better, so keep the windows up and roof closed. Also your spoiler can't be doing you any good.

Keeping 'econ' mode will keep the compressor off and could raise the mpg by 1 maybe.

These don't amount to much, sorry about that.

pressures but very unlikely during normal driving. When the car is running WOT and/or high boost pressure sometimes the ECU retards the ignition to keep the car from knocking. When the ignition is retarded efficiency goes down. Remember that this would normally only occur at very high power settings and high temperatures. Finnally, you have to consider the cost of octane boosters, around $10 per tank for the ones that actually do anything, that's about 40-50% more per gallon of fuel in the tank.

It lowered the idle, and offers smoother acceleration.. I think it also increased MPG by 1-2.. They're not for all cars though, and some manufacturers recommend against it.. Luckily, I did notice an improvement on my car..

I dont think anything will give you 5-10 mpg improvement unless you gut out the entire a/c system, and electronics to save 800 lbs or so..

Difference between 89 (all that was available at some place in Colorado), 91, 92, 93, 94 octane is absolutely none... ran 28mpg the entire trip, over 2,500 miles in 3 days... also local driving... octane has made no difference.

The 89 and 90 octane fuel did plug up the fuel filter, though. That was nice.

I would just face the fact that Quattro Audis get bad gas mileage... 16-18mpg in a mixed driving situation is what I expect for a Quattro.

I always use the lowest octane, 87, when going on a trip. You will not be into the "boost" very much while driving constant speeds. You'll never notice the difference in power and obtain the same fuel mileage. Around town I use 89 in my A6 2.7T, but with my other Turbos, ie 1986 and 1987 5000TQs, I use 87 all the time for a total of over 400K miles.

throughout the day and night and actually at the depth where gasoline is stored, its nearly constant year round except in extreme climates, so I doubt there would be much difference in volume depending on the temperature.

Like I said, unless you are into the boost or it's very hot, it won't matter.

Honda S2000: 240HP/153ft-lbs (4-cyl!) 20/26 city/hwy

I have a friend with a '97 Vette and he gets much better mileage in the city than I do. On the highway we are about tied.

It's the weight of our car (and the AWD) that kills us, not so much the powerful engine. Our car weighs 4,000lbs. The Vette weighs 3,100.

I do also feel Audi need to look into the Japanese-style lean burn technology a little more also. Cuts down on throttling losses at part and low throttle.

<center><img src="http://users.ev1.net/~rscsaab/audi/small%20a6.jpg"></center><p>I constantly get 16-18 mpg in the city and 20-23mpg on the highway. Usually towards the lower end of the spectrum due to a physical, debilitation....unfortunately they do not consider leadfootaitist a severe enough handicap to authorize a handicap sticker. I guess I will have to continue hiking in from the outer realms of the no door ding area of public parking.

Thanks again for the input.<ul><li><a href="http://users.ev1.net/~rscsaab/audi/myaudi.htm">My Audi Site</a></li></ul>