Romain Grosjean says his desire to win, more than his "love" for the Lotus team, is what will decide his future.
Although this season has been a dreadful one for the Frenchman, his lack of results is down to the package and not his talent.
Grosjean is highly rated in the paddock and there have been rumours that he could take a step up the grid next season.
Refusing to commit to Lotus, who have already confirmed his team-mate Pastor Maldonado for 2015, the 28-year-old says he won't let his "love" for the team dictate his plans.
He told Autosport: "I love the team, I love going to Enstone and I love the atmosphere, but at the end of the day what you want is to win a race.
"The thing I'm certainly sure of is that next year is going to be better than this year for the team.
"The way the team is working and the way everything is in place means that it will be good but I don't know if it will be better than 2012 or 2013.
"They will be able to score points more and fight sometimes for good results."
Pushed as to whether he felt he 'owed it to the team to stay on' given Lotus' support through his early years, he said: "No. I am thinking about the future.
"You have to put two and two together and see what it is going to bring you."
As for reports that Lotus could swap Renault power for Mercedes engines in 2015, Grosjean says that won't solve the problems of the here and now.
"We know our pace deficit and we know, if we swap engines, what it's going to bring, then we know which area we have to work.
"That's our process at the moment; where is the problem, how can we do better, why don't we get the gain or loss we are supposed to have?
"So I don't really want to think about what is or isn't possible next year, I just want to do as well as I can."
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