Daniil Kvyat says this year has "not left him with so many positive emotions" and has probably been the most "up and down" of his life.

The young Russian made the step up to Red Bull's senior team this season, and he has had mixed fortunes in his second year in the top flight.

Despite some difficult races, however, he has finished in the points in 12 of the 17 events so far, including taking fourth in Mexico last weekend, a result that increased his F1 2015 points tally to 88, 4 more than team-mate, Daniel Ricciardo.

"It's been very up and down, the most up and down season of my life," Kvyat replied when asked about the year, "it's been a roller coaster.

"I know from a result point of view, it's not looking so bad and I'm very happy generally. We have found ourselves in a tough situation and I think we should give ourselves a break from how we drove out of this situation. The season so far, however, has not left me so many positive emotions."

Asked how he feels he has developed this year, he added: "Coming to the team after the regulations haven't changes so much, you find the package is what it is. You have to get used to it, hopefully soon I'll be able to make some tweaks to my own liking, to my own feelings and hopefully it will make the situation a bit more favourable in terms of my feeling with the car. As a driver you always want to feel what's going on with the car."

Meanwhile, looking to 2016, Kvyat revealed he still hasn't been given any assurances about his future.

"Nothing is clear. I have no idea. I would like to know as soon as possible what is happening. As a driver you always want to know these things," he continued.

Pressed on if he is worried it is late, he noted: "I'd like to know, the team knows better when it is late or when it is not late. I'm just coming to the race track [at the moment] and doing my job. It's not like I can't sleep during the nights.

"It's a matter of patience."