MT Oil consumption failure

Mt Tam I am

Just got off phone with Nissan engineer regarding questions I had regarding oil consumption and catalytic convertors. I had a short block replacement due to oil consumption.

His responses:
Oil consumption failure is greatest in manuel transmissions due to down shifts above 5,000 rpm creating negative vacuum*. Oil viscosity break down does not necessarily begin between 240*F - 260*F. So no need to worry, you are under warranty.

Catalytic convertors are not necessarily effected by six quarts of oil burnt over them. Maybe effected. Diagnosis: you are under warranty. No need for replacement. I pointed out my first smog check is at four years, one year after warranty. Silence followed by "you are under warranty."

Q. How does the car run now?
A. Just as well and well as when it burned one quart of oil every 500 miles. Only less smoke out the tail pipes.

* My car failed before 500 miles in all likelihood during break in, as I was down 3/4th quarts. Six quarts by 2,900.

__________________
Nissan Motorsports 34R Oil Cooler. Stillen CBE. Hotchkis Sport Sway Bars. KW Variant 3 Coilover System. Stillen Gen3 CAI. Michelin Pilot Super Sport. Stillen Brake Ducts. Carbotech™ XP10/XP8 Pads. Z1 Front Rotors. Z1 Stainless Brake Lines. Two degrees of camber