Originally Posted by Jeff92se
Many cars feature varible valve event timing on the exhaust side and don't suffer from oil consumption
I have a theory:
The 05-06 have the rev-up engine; i.e. higher redline.
They also have the variable exhaust valves that the 05-06 non rev-up don't have.
They have the same short block (pistons, cranck, etc.)
If the OC is caused by rings then I would assume that the non-rev engines would also be defective if they were run the same way as cars with manual transmissions.
However this was not really a problem on 03-04 cars.
As far as I can see the only way oil can make it in the combustion chamber is under vacuum. So maybe the exhaust valve timing is causing 'excess vacuum'?
The person who told me to run above 4k rpm was the service rep at an Infiniti dealership.
He said that doing this will consume the most oil. He said that long drives on the interstate and leaving it in 5th gear is what will do it.
When he mentioned the variable exhaust valves I became a little puzzled. But I do recall something about the valve guides/seals being crap. So that would be another way to pull oil into the combustion chamber.
Anyways, this is just a little brainstorming. I appologize in advance if any of my facts are wrong.