Given your usage, we’d suggest you consider the petrol options in the Kia Carens Clavis. While the diesel will deliver the best real-world economy, it needs regular long trips to keep the engine running at its best. Among the petrol options, the standard 1.5-litre unit is nice enough for most needs. It is nice and refined, and there’s decent power for gentle highway cruises and everyday drives. Opt for the turbo-petrol only if you necessarily need more power or are looking for an automatic gearbox option.