What a mess.
Why would the garage change the oil three times, either its got oil or it hasn't, oil doesn't have additives that gradually rebuild bearings, cam lobes or piston rings that have run dry, i think they are spinning a yarn there as mitigation.
What warning light came on?, low oil pressure light, or low oil level light (does it have one), if the low oil pressure light came on then i would be worried...can you estimate the quantity of oil that came out after you stopped.
Fuel consumption, could it be in the middle of a regen at the moment if DPF'd?
As above I have a feeling you'll be struggling to get immediate action on this, so if its a garage you have used regularly and basically trust (well, before this) their word as good, maybe you could negotiate a written guarantee to fix premature engine failure for at least the next 12 months from them....its not ideal but might be a solution.
Going legal should be avoided if at all possible IMO, however tempting.
Edited by gordonbennet on 27/12/2013 at 22:44
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