No Scuderia driver has claimed the World Championship since Kimi Raikkonen claimed the top prize in 2007 although Vettel remains in the fight this season.
The German, a four-time world champion with Red Bull, does appear unlikely to overhaul current leader Lewis Hamilton - he trails the Mercedes driver by 49 points - although with 247 points he has already bettered his tally of 212 from 2016, with four races remaining.
Vettel says Ferrari still have some work to do to reach their maximum potential, but doesn't think any major overhaul is required going into the 2018 campaign.
He told Autosport: "I still think that there is a lot to do still. I don't mean that there is still a lot of changes necessary in terms of we need to change the people because that is what people normally think: when you talk about changes - 'ah, you need to change the people'. No.
"Sometimes you need maybe to make some small adjustments with the same people and it works much better.
"So I think the potential is there in Ferrari, the people are there, talent is there. And it's about us, all of us trying to work together and make it happen."