Peugeot 307 Diesel Addative - Urban Spaceman
A colleague has a 307 circa 2002. Recently, at about 55000 miles, his warning light came on, for the Cetane(?) addative needing replenishing. We did a search on the web, to try to find some. Prices ranged from about £19.00 for a litre. However, we couldn't find a supplier. Eventually, after parting with well over £100.00, Peugeot kindly gave him 3 litres. (The tank holds 5 litres)
Does anyone know where this elixir can be purchased from, and is it easy to get into the tank, once obtained.

Thanks in advance,
Urban.