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Mr Haynes says it has a DPF, or at least has a chapter about removing/replacing it. Ford actually say they prefer oil with a viscosity of 5w/30 that meets Ford Spec. WSS-M2C913-A, whatever that is but a mechanic friend told me that is semi-synthetic. They also say top ups can meet ACEA A1/B1 or...

That sounds as though it makes sense because it only happens at low-ish revs on hard acceleration. If you accelerate hard under load from say, 1800 revs it appears clean (in the mirror!). It wasn't 'laid-up' in the proper mechanical sense, just left in the yard.

I changed the EGR valve for a brand new Ford replacement about 100 miles ago. I just filled it up today in the hope of thinning out the Redex and I'll try running it for a bit:p

That's odd because Ford recommend 5w30 semi synthetic or do you mean mixing that with redex is a no-no. Sorry if I am being a bit thick.:confused:

5w30 semi synthetic. What's the problem with redex? I have used it off and on for years with my Laguna DCI.

Thanks, but how do I know if the turbo is overboosting and what is the cure?:)

Thanks for that. I'll see what happens and let you know.:p

I have a 2005 (55 reg) Mondeo TDCi 115 hp (85Kw) estate. It has done 116k miles and was left standing for 2 years before I got it. I have serviced it (New oil/air/fuel filters/proper oil change, including flushing) and fitted a new EGR valve and thermostat. I have put Redex in the tank. I runs...