I'm about to order a new company car. We are re-imbursed for petrol on a sliding scale, so >2 litres gives 30% extra per mile. I object to the Mondeo and S-MAX 2.2 engines only being a £5K option as you have to go to the Titanium X Sport to get the engine, so I was thinking of a Mazda 6. I've seen a lot on the forums (not just yours) suggesting many issues with oxygen sensors failing after 900 miles and 3 week repair times - not practical as I do >30K miles per year. Have Mazda fixed this issue ? It's a lovely car. I could go to my limit on the lease and get a facelifted C-Class but the Mazda does everything I need.