Yeah, I figured Chop's temperature swing would be much bigger than mine. It's very temperate here. Winds are fairly similar (low) and the suburban roads I drive are fairly sheltered from wind by trees and structures.
Relatively low speeds I guess. I'm mostly on the road when there's little traffic, so I stay pretty close to the 50-60k/30-40mph limits.
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Did some thinking, perhaps it's the PCV Valve itself. Would that match the load-dependent economy changes?
The oil-cap-off test has no impact on idle, which I think is bad. It's integrated into the engine head cover, so I can't test directly.
Unfortunately it's not listed or noted in the official VAG service manual for my engine, and the VW parts diagram doesn't list it as a part either.
