As far as Chevron's adopting the new mortality tables, I've not heard a thing. You should expect to hear anything from Chevron in any communication. You'll need to ask the right people to get an answer on that. Besides, Chevron uses a "unisex" mortality table to figure our pension benefits.
I expect an announcement from the IRS to be made soon concerning the new mortality tables for males and females. You should follow the news about this at www.irs.gov. Once an adoption date is made known, all employers with defined pension plans will need to adopt it at some point.
Once adopted by Chevron, the new mortality tables will surely lead to increased payouts for lump sum pensions because the updated tables will indicate longer life spans for the average American.