Really bad MPG since winter hit??

[Moezer]

Hey guys, so since I got the X5 it has been super good to me and my wife other then the 2 back tires going flat at the same time .

But since the cold weather has hit here in Calgary Alberta the x5 has dropped in MPG like a lot!! in the summer it got just around 800 kms now since winter has hit, its not even getting 450 kms to a tank... there is no check engine light or any warnings.

In the summer I put in a cold air intake, its still on the x5, should I put the stock intake back in to it?

Could it be that the intake is sucking way too much cold air and causing the engine to run richer then it should that makes it drink gas like its nothing?

thanks for any help

[motordavid]

Tire pressure, 'winter gas' in CDA?
Not a fan of 'cold air' intakes...
GL, mD

[Brandon002]

Mine has lost some MPG too. When it was nice out I was getting around 450+ miles to a tank, now it's down to around 400.

Do you let your car run to warm up? Warm up time can decrease your MPG as the car is using gas, but not gaining mileage.

Also, cold air intakes are kind of a waste. A good, drop in filter like a K&N, Dinan, Pipercross etc... will do the job.

Most "cold air intakes" aren't even cold air. It's a pipe and a filter that sits right in the engine bay, in fact sucking in HOT air.

[greymda]

what'a a good city mpg value?

[Brandon002]

In a 4.4? I get around 16 if I drive nicely... If I drive like I normally do around 14.5-15mpg.

Since winter hit I'm getting around 13.5-14mpg.

[THE VEIN]

Omg my 3.0 would struggle to get 300 for a tank. now I'm barely reaching 250 before the gas light comes on

[THE VEIN]

Originally Posted by greymda

what'a a good city mpg value?

"city" driving is different for everyone. For example, where I live the speed limit is 30 and you can barely go 300ft without hitting a stop sigh or a speed bump and where my cousin lives in Florida it's like 1.5miles between red lights

[TiAgX5]

Originally Posted by Moezer

In the summer I put in a cold air intake, its still on the x5, should I put the stock intake back in to it?

Could it be that the intake is sucking way too much cold air and causing the engine to run richer then it should that makes it drink gas like its nothing?

thanks for any help

The cold air intake will not cause a rich condition. The O2 sensors measure the exhaust gas and cause the ECM to adjust the fuel injector pulse width to deliver the correct air/fuel ratio (cold air will cause a wider pulse and deliver more fuel, and make more power).

Even with a carb'ed motor, cold air causes a LEAN condition if jetting was set for hot weather.

[dkl]

Originally Posted by THE VEIN

Omg my 3.0 would struggle to get 300 for a tank. now I'm barely reaching 250 before the gas light comes on

Same here. Our OC streets are somewhat wide and we can hit 50mph to 60mph without much stops if all the lights are synch'ed. Traffic is also somewhat light at my time of commute. Even that, I cannot reach 350 for a tank.

I guessed we have a heavy foot?

[THE VEIN]

Originally Posted by dkl

Same here. Our OC streets are somewhat wide and we can hit 50mph to 60mph without much stops if all the lights are synch'ed. Traffic is also somewhat light at my time of commute. Even that, I cannot reach 350 for a tank.

I guessed we have a heavy foot?

I can barely get to 40 without getting to a stop sign I'm not even talking about a red light