  The high-precision data from hadronic tau decays allows one to extract
information on QCD condensates. Using the finalized ALEPH data, we obtain a
more rigorous determination of the dimension 6 and 8 condensates for the V-A
correlator. In particular, we find that the recent data fix a certain linear
combination of these QCD condensates to a precision at the level of O(2%). Our
approach relies on more general assumptions than alternative approaches based
on finite energy sum rules.
