the problem here is john does not know what he is talking about on this matter he is just speculating.that is an expected compromise in some modern engines as a trade off for much improved fuel economy.
most of his videos are ok but he does have a few where he is clueless and the issue with the 2014 to 2016 models is one where he is totally clueless.
if you dig into the mechanical side of why some of the engines chew oil its because of an error during the manufacturing process of the engine block and nothing to do with fuel economy.
a common rundown of the problem engine is it is fine at the start and then once the rings have seated the oil begins to drop and at around 30,000km the oil usage is normally over 2 liters per 10,000km.
the consumption will go up as the kms go up so at 200,000km what will the usage be?
the exact same engines in other years and in the same year range that do not have this defect in the block don't use the oil but have the same fuel economy so you can clearly see it has nothing to do with that and poor old john just did not work this one out.
the only proper fix is to change out the core of the engine and that is normally the block and the head and they will reuse a lot of the old gear that is bolted on.
this is why holden is doing what ever they can to ignore the issue or band aid fix it with thicker oils to get out of the warranty period because its costly to replace the engines.
some people have had refunds or replacements on the entire vehicle, if you have an oil burner I would be fighting for a new engine if you plan to keep the vehicle over 100,000km.