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thanks for all the responses
I think winter gas might be in effect already for me
I might be giving the car more gas as it breaks in, yes.
The reason I mentioned doing the track day and not changing the oil after, is that in other cars I've seen a sharp drop in fuel economy when the oil needs to be changed. And then right after I change it, mpg increases back to normal. So I want to see if it gets better right after I change the oil next.
The MPG seems very related to speed, more so than with other cars. If you start climbing north of 60mpg the MPG drops rather quickly.
With my silverado, it doesn't matter much whether I'm driving 55 or 65 its exactly the same MPG. Not so with the Camaro.
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