This paper says the metallicity of the sun was overestimated, and that it contains only about 1.22% metals, rather than the 1.98% previously estimated.




http://www.mi.infn.it/PHYSUN/Grevesse.pdf

Does that affect models of the sun's age and luminosity? Is the sun older or younger than previously estimated, and will it exhaust the hydrogen in the
core sooner or later than the prior 10 billon year estimated lifetime?

BaSTI Home Page

The models indicate that a sun sized star with 1% metals will burn hydrogen in its core for about 8.677 billon years,
a sun sized star with 1.98% metals will burn hydrogen in its core for about 11.079 billion years.
making a linear projection, which may not be accurate, does that imply that the sun will burn hydrogen for about 9 billion years rather than the 10 billion previously estimated, assuming the 1.22% is correct?