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by multjoy 1626 days ago
Mine failed an emissions test (11yr old diesel mondeo with 170000 on the clock), but passed when I took it for a thrash round the M25 and a load of additive in the fuel tank.

The next year emissions weren't an issue, mainly because the only journey it did was a 250 mile run up the A1/A66/A6 and back again on a weekly basis.