Gas mileage drop

94_KB_5.0 · Feb 28, 2009

So i don't get good gas milage as it is, but my last two tanks have drooped to like 10mpg-ish rang. I put a new cap and rotor, plugs, coil, and changed to oil like a month ago. I was thinking maybe o2 sensors........ Any idea's?

john#21 · Feb 28, 2009

clean your maf?

CC'S95GT · Feb 28, 2009

maf, o2's, clogged cats (if you still have em)

Rice_slayer · Mar 1, 2009

Where do you live and what have the temperatures been? Last winter when I HAD to drive my car I was getting 10-12mpg in the city, once temps got to -7 celsius I was getting around 15mpg, i get 19mpg in the summer for comparison. If it's not the temp, check the normals (MAF, Air filter, o2s etc).

94_KB_5.0 · Mar 1, 2009

The temp has been around 40s-70s here(OK), and i don't have any cats. I was getting 16 mpg normally around town. The maf is only about 9 months old, could it need to be cleaned all ready? Is there a way to check the o2's?

Annamaria828 · Mar 1, 2009

i had the same problem the last month or two that i had my car. i used to get around 18mpg n then it dropped down to around 12 or even less. i would run through half a tank a day sometimes. i never found out what it was though because i crashed my car on dec 27 so im not driving it anymore

Rice_slayer · Mar 1, 2009

94_KB_5.0 said:
The temp has been around 40s-70s here(OK), and i don't have any cats. I was getting 16 mpg normally around town. The maf is only about 9 months old, could it need to be cleaned all ready? Is there a way to check the o2's?

My MAF is the factory one, age doesnt matter(sometimes). Mine get's dirty often due to a K&N filter. If your CAI has a filter that requires oil, there's a good chance some of the oil good on the MAF, it has happened to me a few times. I always due a 4 month check-up on my maf and clean it every 6 months.