Citroen C4 grand picasso 1.6 HDI oil and filter change. In this video I detail how to replace the oil and filter on the 1.6 HDI citroen/peugeot engine. I hope this helps. Hello According to the Citroen C4 Picasso schedule for your vehicle. Engine Oil & Filter Change: from £90.95: from £105.95: from £113.95: from £123.95: Interim Service: Découvrez comment changer le filtre à air sur une Citroën C4 1.6 HDi 16V 90cv grâce à nos experts mécanique.Retrouvez toutes nos pièces auto sur : I change the oil annually, irrespective of mileage, (I'm not doing a lot now anyway) in line with the severe operating conditions guidance given by Citroen. As Ham said, oil and filters are cheap compared to replacing an engine at £4,000+ if the turbo lets go on a HDi 9 Clean the oil filter housing cap. Use all-purpose cleaning spray. 10 Unscrew the filter housing cap together with the old filter element. Use a drive socket #27. Use a ratchet wrench. This does appear to be extremely dirty for 14K miles worth of driving, given that these are supposed to go for up to 20K mile on some Citroen service schedules. I serviced a 1.6HDi C4 which had done 24/25K miles since the last one, the oil was very odd looking, it felt dry and could not have been any more dirty but it drained out fine. Carefully remove undertray. It is heavy. Using a 21mm spanner or socket, carefully remove the sump plug and fully drain the oil. When the sump has emptied, wipe clean the sump plug area with a paper towel and fit a new sump plug and washer. Do not over tighten. How often to change the Engine Oil on your CITROËN C4 . Recommended service and replacement schedules C4 I Picasso (UD) (10.2006 - 10.2013) xZlgTf4.