On Apr 15, 10:15 am, Mxsmanic wrote:
Am I correct in assuming that changes to mixture diminish with increasing
altitude? That is, a mixture change is more important and larger when going
from sea level to 5000 feet than when going from 10000 to 15000 feet?

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The pressure and density change exponentially with altitude. So in
theory you are correct that the changes in mixture would diminish with
altitude. However, pressure is almost linear up to about 20,000ft (ie
1" Hg per 1000ft) so one could consider the mixture to be linear at
these altitudes.