wierd gas milage.

[2sl0]

so ive had bad gas milage on my car for some time now. when i bought the car i used to get 18-20 city and 27-31 highway! then at its lowest point it went down to about 13-15 city and 20 highway. right now im getting about 17 city and 16 highway?????? . ive ran an obd2 scanner on my car and shows no codes, i drive like an old lady (car almost never sees anything over 3k rpms) so i dont think thats the problem. anybody had an issue like this b4?

[oc-drop]

2.8 or 2.7t?

[A62TURBO]

Have you changes the octane of gas that you use?

[2sl0]

Its a 2.7t an no I didn't change the octane (have alwayse used 93), but I did change gas brand. At first I used mobil, then hess (or whatever I could find cheap) now I'm back to mobil which I think its why my gas milage went up a bit. But still getting horrible highway mpg.

[roccodan]

When was the last time you changed your plugs? It could be a number of things but I recently changed mine and saw a big improvement. I would start with a tune up if it hasn't already been done.

[rxphiler]

I get 16mpg city and I drive with a heavy foot. I only get 22mpg at best hwy. I have new NGK iridium plugs.

[2sl0]

the plugs were done about 20k ago i guess it should be about time for another change. rxphiller do u have the part umber for the plugs? are those the stock ones? i cant remember wich ones were put in since they got replaced with the timing belt/water pump.

[2sl0]

ok so when the guy changed my spark plugs he gave me the old ones back and put them in the box that the new ones came in. i just noticed that the plugs he put in were NGKbkr6e and the ones he took out were NGKpfr6q. i remember him telling me that they were pretymuch the same (after a long explination) but the bkr6e were alot cheaper. so is he right or should i just change back to the stock ones? i remember i asked him to change the plugs because i was already starting to get bad gas milage so i dont think they are the cause of my bad gas milage, but i still wanna make sure i have the right plugs in my car. thanx guys

[rxphiler]

Hey I could tell you the numbers later today I am at work right now. But I bought them off ebay for aprox $42.00 with S/H. They were ngk ix iridium the guy has some listed now.

[m-avant]

the ones he took out were NGKpfr6q.

I'm currently looking into a replacement set for my Avant as well - and saw this on the NGK site:

The NGK site lists the PFR6Q as the suggested plug for an AUDI A6 QUATTRO 2.7 V6 BEL FI. Laser Platinum, with a .032 gap
http://www.ngksparkplugs.com/product...r_platinum.asp

The BKR6E is what's listed for my 3.0.

HTH

[2sl0]

cool thanx RX id apreciate that. woow thats $42 for all 6? i remember audi wanted like $20 each!!! thanx for the info m-avant im gona change back to the pfr's just to have everything the way it should. oh and btw my car just hit 100k miles wow shes getting old :) anything u guys think i should look into replacing at her old age? o2s maybe?

[Gigi]

I got over 24MPG driving to the mountains yesterday.
I think you might need to get a tune up and No you do not need to change your plugs just after 20k miles, unless these are not the correct ones of course.
IMO best gas is Shell 93oct. use good oil and get it changed every 3-5k miles. try doing a Throttle Body Alignment with the APR program if you ahve it, or Vag com... there is also a more manual method in the user manual I think.
and Stay out of Boost, it is the key to good gas mileage on our cars.. Boost gauge helps lear how to drive efficiently.
Your TB might need to be cleaned up too....check it out. Does the car run strong?
Check your air filter also. it might be dirty
Check your tire pressure, low pressure will increase gas mileage by maybe 10%. Driving the windows/sunroof open will also increase mielage... A/C on... rood rack... usual suspects.

[rxphiler]

Hey sorry I could find the number for the plugs they are packed up somewhere (in the middle of a move) but here is the ebay add address.
http://cgi.ebay.com/ebaymotors/96-04...spagenameZWDVW

[Gigi]

My prior set of plugs were NGK PFR60 with the Audi logo on them

[trapped]

hmm I was getting about 14.7 city driving. Then I got an oil change and I get about 18 or 19 driving the same way! Who knows if you havn't had the oil changed in a while...

[2sl0]

Well I just ordere the pfr6qs so well see if that helps at all. Gigi I wonder what the difrence is between the pfr6q's and pfr6o's? if any. About the oil change, I really don't see a difrence in mpg when I do an oil change but I do change it every 3k. I think if the plugs don't help I'm just gona end up changing my MAF maybe even o2s

[projectdarka4]

i get about 15 and i drive hard with the 2.7t... i was getting 16 but i got a new maf and filter and for some reason it went down 1 mpg... : (

[2sl0]

i get about 15 and i drive hard with the 2.7t... i was getting 16 but i got a new maf and filter and for some reason it went down 1 mpg... : (

Damn that's wierd, did u replace it becuse it was bad or just to see if it would help improve ur mpg? I want to replace mine cuz I remember when I bought the car they had just replaced it so I figured that's why I used to get good mpg. Also do u alwayse get a cel when ur maf goes bad? Is there any way to check if its working correctly?

[projectdarka4]

i replaced it because when i had the car scanned the old maf had no voltage reading...

[mykcuz]

Crack in the throttle body boot? Losing some boost? Plus tune up

[mykcuz]

Actually, checking your tire pressure can have a significant affect.

[suth31]

Crack in the throttle body boot? Losing some boost? Plus tune up

Roughly 2194 days have passed... literally knocking the dust off this thread... for ???

[mykcuz]

I'm very tired

[suth31]

haha, it made me chuckle, so thank you