[Dude]

I currently have a '98 Chevy 1500 pickup, 4x4, and it gets about 15 average, it has a 350 V8. Would a Camaro with an LT1, (same displacement), get slightly better gas mileage since it's a smaller, lighter car?

 

[Gregg-O]

Yes....as long as you keep your right foot under control.

 

[Heavy_SS]

Gear ratio will also play a factor.
What gears are in each vehicle?

 

[COLD STEEL]

Assuming the drive the same in both vehicles, you should get more from the camaro.