We present the latest B hadron lifetimes, B s mixing, and D 0 mixing measurements using up to 3.0 fb of data collected by CDF and D0 experiments at Fermilab. The B s lifetime is measured from both J/ψφ (CP admixture) and flavor specific channels, and the Bc lifetime is obtained from semileptonic channels. Following the B s oscillation frequency measurement at CDF in 2006, the D0 collaboration n...