I bought a SLT2 in mid December and have about 3300 miles on it. Every fill up I reset one of the trip meters to see how many miles I get on a tank. Then out of habit, when I'm filling up the next time I do the basic math of the miles on the trip meter divided by the gallons pumped into the tank to see what MPG I'm getting. I've noticed that the miles I calculate at the pump have been about 1-1.5 MPG less than the average MPG displayed on the console. Anyone else notice this?

The computer says I average about 25.5 MPG typically (50/50 city/highway). The pump tells me about 24-24.5. So it seems like either the trip meter or the average calculation is incorrect.