First, thanks for having me here. I just bought my first Honda, a 2010 GX, and so far I'm loving in. Living in Oklahoma, I'm in the heart of CNG country where filling stations are plenty and costs are low.

That said, I noticed something wonky with my car's fuel gauge this morning.

I filled up last night, to 3,000 psi, per the gauge. Today, during my 30-mile commute to work, the gauge tells me I used 4 dots-worth of fuel, which seemed odd to me, because it seems like I used a lot of fuel.

The manual says the gauge can act funny in cold weather, when the pressure inside the tank drops. However, it was 85 degrees during my drive today.

Does anyone have any insight they can share? I plan on filling up again once I get home, to see just how many units the car used during the 60-mile round trip.

I'm Googling about to see if this is a known/common/dont-worry-yourself issue, but so far I've come up fruitless.

Thanks, everyone!