I always check it after couple of hours or rest. Usually I do check it first thing morning. It doesn't make sense though, the car shouldn't even pass emissions then if its burning 4L in a week and thats less than 500km we are talking about, close to 300km i think.
The smoke is v.clean even first thing in the morning.

Whats a leakdown test? I talked to honda about oil consumption, they never mentiond it