Bad Gas Mileage

[breakaleg]

I have a 2005 Mazda 3 that I purchased a few months ago. It gets about 325 KM per tank (47Litres). I've brought it in several times for servicing and they say nothing serious is wrong.

Now they are suggesting I replace some fuel injection thing(?) which the manual says should be replaced every 12 - 24 months. Does anyone have any idea if this will work?

 

[Mazda_Tech]

do a tune up. How many miles is 325km equal out to?

 

[breakaleg]

do a tune up. How many miles is 325km equal out to?

325 km is 200 miles. I just did a tune up last month and had a temporary increase of 75 km (46 miles) for the first tank, and then it was back down to my usual 325. I've brought it to the dealer twice now, and they can't find a problem. From here, they say it's "trial and error" at my expense to see if anything improves.

 

[gru]

Take off lead boots bro

 

[lelola]

325km? That's insane...
I usually get 550-600km on a tank...

 

[dread]

My ms3 gets 325 miles per tank you car is screwed. How many miles on the car? You should change the fuel filter. The only problem is its int the gas tank.

 

[TheDutchGun]

They should be taking the car and working on it until they find the problem. And all under warranty if you still have warranty left. Thats complete bulls*** if thats all you're getting to a tank. I get better mileage 100% city driving than you get.