My mechanic suggested that running some of this through the car would add a bit of lubricity that's lost with bio-ethanol fuels, has anyone used it before?

 

http://www.morrislubricants.co.uk/scripts/prodView.asp?idproduct=94

 

He said that he's run some through his Golf PD 1.9 and it cured a reoccurring limp mode and made it feel quite fresh again.

Never heard of it before. A lot of people on here use millers diesel additive including myself (used if for 129k miles so far in same car).

Diesel rhino is another option.

Helps keep your engine clean which helps prevent problems from carbon build up.

The Italian tune also keeps things healthy!

I have used wynns myself in my diesels

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People like millers etc will probably make less profit a year than shell spend a week on R&D.

Once you realise that I think it probably changes your opinion on these products.

I use forte stuff, used it on the last service and had no issues since.