FreedomPenguin

Could a bad break in of the engine cause horrible gas mileage? I was getting like 27-28 city now I get like 20-22.. I followed the instructions correct for most part. At 500 miles, I took a 300 mile trip, but I kept going form 4-5-6 so then 6-5-4 so it would change rpms for a few minutes at a time.

=\ wtf.

even when im in 6th gear going 65 on highway i reset the mpg button, it says i get like 26 max. and thats off of course, so im probably getting 24mpg highway.


granted I was getting 27-28 when it was 70* temperature, now its 30-50 degrees typically, will that have a huge impact?..

wickedwhite

I don't trust the MPG calculator. Every time I completely fill my tank I reset the Trip Odometer. On average (with responsible driving, lol) i can get 380-400 miles to the tank, but I do a lot of highway driving. I'd say try that to see how much you're actually using. I hope this helps.

russiankid

I get about the same in the city, it all depends on throttle input, when you're shifting, etc. If I am really easy I can get 25 or so in the city. My MPG meter shows 24.0 AVG.

FreedomPenguin

What rpm are you shifting at? I stay 2.3k-2.5k

ashtc2

dropping to 4th gear at 65mph will def get the car revving high. I've achieved my best gas mileage by driving at 65, minimizing lane changes, no ac, windows up.

talt2008

i shift between 2.5-3k and i average between 28-30mpg combined city and hwy. you just have to drive at turtle speed to get the best milage. when i went to exposed a couple weeks ago (5 hrs from my house) i did 70 the whole way and averaged 35 mpg. the break in period gives you crappy milage, but i have 60,000 miles on my car so idk if that'll make any difference. my advice would be to just drive slightly different on every tank and see what works best in the area you live in. all terrains and elevations will make a difference too

BlackDaHlia

Something I just tried yesterday. With the stock air box: I removed the snorkel cut out that white secondary filter and wrapped the outside of the air box with AC insulation foil tape that I picked up from Home Depot... Before my max AVG MPG was 28. Today my AVG why MPG was 34-39 hwy and with city MPG it never went below 30 and with my job I do a lot of driving all day. My usual hwy speed is anywhere from 65 to 80 mph when im in a residential area its 10-45 mph. So it seems to be working so far.

Delorean2006

hmm going to have to try that on mine, i just started seeing dip in my mpg because the temperatures have dropped dramatically and i leave before 6 every morning for work and it is freezing, my mpg dropped from 27.5-29 to 25.5

Roller_Toaster

iTrader: (1)

^ Check your tire pressure.

FreedomPenguin

i seriously cant get it above 24mpg on highway.. 65mph 6th gear..
its snowing out right now.. but il check tire pressure tomorrow.

Delorean2006

I check my tire pressure all the time, there I know I have no problem and just recently had my oil changed

shockerz

try resetting the ecu, you might have gotten some bad gas. just pull the neg battery cable off for 10-15 minutes, i have had to do this once or twice, i usually get about 28 mpg with 50/50 driving, but on the highway i get 32-36 mpg running 70-80mph. i do have exhaust and a cai though. also try new air filter.

Delorean2006

the bad gas i actually could agree with, i mean i usually get the best performance with shell or sunoco and sometimes i just use gulf because its the cheapest by like 6-7 cents a gallon compared to everywhere else and its right next to my job, i mean the car is only 4 months old but i think was sitting for a while before i bought it, im trying the ecu reset now, hopefully that would help

shockerz

once you reset the ecu, it will take 100 or 200 to relearn the car, so dont freak out if you get worse mileage for a bit.

Delorean2006

oh ok, hopefully it will help, im actually going on a 150 mile ride today and then gotta drive back so i think ill be good and its all highway

Roller_Toaster

iTrader: (1)

Sorry, didn't mean to sound like a smart ___ there.

I used to work on cars for a living, and when it would get cold, everyone would come in saying that their mileage sucked, wanting some crazy work done to try to fix it. 90% of the time, it was because the air in their tires had condensed due to cold weather, causing low psi.

But then again, we DO have tpms systems in our cars, so you would catch that.

Two other possible solutions:

1)Clean out your car/trunk (Im serious)

2)Change your driving style. I get 30mpg in my xb2, but only when I drive accordingly.

russiankid

Depends, on a normal cruise day I shift between 2500-3k. Sometimes I will shift between 3500-4k.
I've actually managed to get 35mpg with A/C on and cruise set at 70mph. This was on a 166 mile trip.

FreedomPenguin

oh yeah, i forgot the power was all reset like 4 days ago. they put new clutch, etc all in my car. and i got in and had to reset everything, so maybe it will take awhile to relearn.

BlackDaHlia

well if the car is only 4 months old its barley broken in. I remember getting that for the first few months of owning my tC. Ive been resetting my AVG MPG trip every day and now I am getting 30+mpg thats combined city/hwy. Even when i get on it I still get 25-28MPG. After modded air box its more consistent at 30MPG

russiankid

I broke my tC in in the first month. Had over 2k miles on it. I bought at the end of May and now have 75xx.