Mike wrote:‘Fit for purpose’ won’t cut it imo, there are thousands of Customs running around without the problem that yours suffered, so they’re obviously fit for purpose. As for the question of the various Ford dealers changing the oil, it’s extremely unlikely that they wouldn’t change the oil. I haven’t used a Ford dealer to service my last couple of Transits, not because I don’t think they’ll change the oil, but because my local one Perrys Aylesbury are a shower of sh*t. So I don’t think you’ll get that.
What they’ll deduce from what you posted here (yes they do read this forum) is that you didn’t check the oil level between the last service and when it went bang. Remember that you’ve posted info here with your name, home address, and company name
So I stick with my suggestion that you should go for a goodwill claim.
Oil level was checked between service and after it went bang and was fine.