Fuel limits have been raised this season, however, Renault executive director Marcin Budkowski says teams may still opt for smaller fuel tanks and fuel saving to keep weight down.
This season fuel limits are up to 110kg from 105.
This was done in the hope that drivers could push harder with more fuel on board instead of being forced in fuel saving.
Budkowski, though, isn’t sure all the teams will embrace it.
“There were a number of races last year where people weren’t taking 105kg, but were taking less,” he told Autosport.
“The disadvantage of carrying more fuel is you’re slower because the weight of the car is higher.
“It’s always a compromise between the quantity of fuel which allows you to push harder during the race but slows you down in terms of weight.
“There were a number of races where 105kg, filling the tank, wouldn’t allow you to race properly and the amount of fuel saving teams had to do was significant.
“Couple this with some tyre saving and there were a number of races where drivers were really managing the pace rather than pushing the car.”
He does, however, acknowledge that increasing the fuel loads – at least in the rules – should help improve the racing.
Budkowski said: “The steps taken to increase fuel capacity should allow, on these specific races, the drivers to push as hard as they want to push.
“Couple with tyre choices that are more conservative than last year, there will be less tyre saving.
“The issue is we’re going to have a lot of one-stop races – most of the races are going to be one-stop.
“But with drivers who can push on the tyres, rather than save them.”