Subaru Outback Forums banner
  • Hey everyone! Enter your ride HERE to be a part of this month's Ride of the Month Challenge!

1 - 4 of 4 Posts

·
Registered
07 OB 2.5i Basic 120,000+ Miles
Joined
·
85 Posts
Discussion Starter · #1 ·
What type of MPG are you getting and where to do you buy gas, please? I changed the timing belt on my '07 OB at 112K miles and have had terrible gas mileage since then (Now at 115,600) I used to get 25-27 and then after the belt change I was getting 18-19 mpg. I changed out my Fuel Air O2 Sensor in bank one position one yesterday. That helped me go to 23-24 MPG. I took the battery off line now, to reset the system. Not sure what else to do. I thought maybe I need to change out the 02 sensor of bank 1 pos 2. Not sure if that one affects fuel consumption. Has anyone else had this issue? I do not think it is winter fuel mix. I never noticed this in years past. No CEL codes. No issues other than I get pissed when I check the instantaneous and avg MPG.
 

·
Registered
Car: 2008 Tribeca, 2010 LGT, Sold: 2005 XT Limited
Joined
·
2,926 Posts
Strange correlation with the timing belt. Sounds like you saw a large change with the O2. Now you need to give your car some time with the new O2 to see if it comes all the way back. After a battery reset, it can take a few 100 miles before it's back to where it was.
 

·
Registered
2013 OB Limited 3.6R
Joined
·
30 Posts
Is it possible that the mechanic made a mistake while installing the timing belt? If your valves are not opening at the right time, that could affect the mpg. On my previous car ( 2000 Forester), the mechanic used the wrong belt (which had alignment markings slightly different) and I started getting misfires. It was a small mistake so I didn't seize the engine, but a big enough mistake to cause tons of issues.
 

·
Registered
07 OB 2.5i Basic 120,000+ Miles
Joined
·
85 Posts
Discussion Starter · #4 ·
Mechanic was a complete Maroon!

Is it possible that the mechanic made a mistake while installing the timing belt?
That was one of my concerns. But since I was the one who installed it, I got no one to blame... I did take the covers off and have it looked at by a shop guy and he verified that I did it correctly. So I guess I just need to drive it 200 miles or so and see if it straightens itself out...
 
1 - 4 of 4 Posts
Top