Ferrari team principal Maurizio Arrivabene is full of praise for Shell following Ferrari's brilliant Canadian GP.
Ferrari are top again of the championship following Sebastian Vettel's win in Montreal.
The German is now a single point ahead of Mercedes' Lewis Hamilton.
"It was not only a great victory for Seb, but also for the entire team," said Arrivabene.
"We worked very hard to work out everything in the finest detail and therefore also earned this result.
"We know that we still have a long way to go until the end of the season, but we know that everyone at Ferrari will give it all to keep the best results.
"And of course the constant support of our sponsors and technical partners, especially Shell.
"Without them, we would not have been able to improve the car permanently."
With rivals Mercedes expected to turn up to France with a brand new engine, Ferrari know they have to be at their best next weekend.
Mercedes lead the way in terms of the constructors' championship by 17 points.
If Ferrari want to reduce that gap, they know that the Circuit Paul Ricard could be vital.