Is fuel the parent of all of the tables: Gearbox, Type, Price and instock
If so, then yes, in each table create a foreign key relation to the fuel table.
you have to evaluate the parant / child relation on a per table basis. Fuel may not be the parent for all of your tables.
It is possible that in the Type table, the Gearbox may be the parent.
If that is the case, then the foreign key relation to create in the type table would point to the id_gearbox column of the gearbox table.