2001 Rav4 gas mileage

[rain_or_shine]

My Rav4 (AT) is currently clocking in an abysmal 360 kms per tank (56 L). I've already replaced the air filter, spark plugs, and fluids (tranny, engine oil). What else could be the cause of this, since I've search around and on average a tank should last at least 500 kms?

Considering that it is a 4wd car and I only use it M-F to/from work 30 kms per day, from Coquitlam to Annacis Island. My tires are inflated to specs, I drive steadily and there are no leaks anywhere.

Thanks in advance.

[satek]

Replace your O2 sensor.

[alpinestars]

so did checking your o2 fix your problem?