Murphy believes Stanaway is one of the 10 best drivers in the field, noting that team-mates Mostert, Winterbottom and Waters have also had disappointing seasons.
“I think it’s good that Murphy came out with those comments. He’s got a lot of credibility,” said Stanaway.
“If I come out and say that sort of thing, it’s easy for people to brush it off, but someone with a lot of respect in the industry saying that means a lot to me and I think it’s just close to the truth.
“I’m always critical of myself, and I can always do better, and I am never driving perfectly because I lack experience.
“Sometimes I do a good job and sometimes I don’t because I’m still learning, sometimes I rush things a bit when I’m on new tyres or whatever, but I think the job I’m doing is still pretty decent.
“If everything around me was working well, I’d be good enough to be in the top 10. It’s about refining myself and improving my driving, which is what you do when you’re a rookie.
“Aside from that, there’s a lot of work we need to do as a team, basically, to go about our racing more efficiently.
“But that’s what we all work on between rounds and throughout the course of the year and we’ve got a lot of work on the table at the moment with the Mustang coming on next year.
“Hopefully we have good foundations as a team when we get that new shell onto it and we can have a much better year.”