I can't see how the Ferrari/Shell tie up is any different from Merc/Petronas, or Renault/Total (Elf).
They all work hand in glove with each other on fuels and lubricants.
Often the commercial benefits drive the amalgamation, then the teams work together. Ferrari was with Agip for many years, and Mercedes with Mobil in their dominant McLaren years.
Ferrari do have a great record in reliability terms, though in the V10, and V8 era, their engines haven't stood out in terms of power or weight, or innovation.
Mercedes changed the game in using aluminium/beryllium components, then Ferrari sulked when they found they couldn't get the same, and lobbied hard to have it banned on 'safety grounds'.....
Then BMW and Honda came in and put them in the shade in terms of power and weight. The genius of Brawn/Byrne, and Schumacher brought Ferrari their golden era.
Since then we have seen Renault use the power of lateral thinking within the rules to great effect, in terms of throttle control and mapping, which dates back to their innovations in the 1991-1999 era.
Neither can I see the fuel/oil companies discovering a magic bullet, with the heavily regulated rules. The process of refinement will continue.
Interesting times ahead, I expect more power train related DNF's in the first half of the year, but after that, no more than usual....