Correction:

 

“If you are turbocharged, pressurized, and at 25,000 feet, it is probably more like 20-25%, maybe more because of COOL AIR and added flow from intercoolers.  And it is harder to minimize.”

 

Error, error, error.

 

Should be THIN AIR.    More volumetric flow is required which requires more delta P across the engine which increases the drag.

 

Sorry for the error.

 

Erroneous Fred