Ferrari's early runs in the simulator have shown that drivers will have to adapt to a new style of racing this season.
Not only is Formula One swapping from 2.4-litre V8 engines to 1.6-litre turbocharged V6s with ERS but the sport is also limiting the amount of fuel per race.
As of this season, drivers will be permitted a maximum of 100kgs of fuel for each grand prix, about 60kgs less than they used in 2013.
And that change means managing fuel economy will be vital.
"[Fernando] Alonso has been to use the simulator and it has been interesting for us," Ferrari technical director James Allison revealed to Autosport.
"Fernando gave us some important feedback and details that were important to the team in terms of things we can manage during practice and the race.
"During practice, the car will have more electrical power (available) and the car can run at the limit of fuel flow [which is 100kg per hour].
"In the race it is going to be different. For some races 100kg [of fuel] is more than enough, but for other races you need to be careful to manage the fuel on each lap.
"This different way of driving will need practice - to learn how best to be fast but not to use up too much fuel."