How to Change the Oil and Filter on a Citroen C3 Diesel

Let’s see how to change the oil and filter on a Citroen C3 MK2: we will use a pre-change additive that will help clean the engine thoroughly; open the bonnet, remove the oil filler cap, start the engine and let it run for 5 minutes, then pour in the additive, such as Liqui-Moly Engine Flush, which can be found on Amazon with code B01C4FZTA4 at a price of £13.90 with free delivery for Prime customers.

Restart and let it idle for 10/15 minutes (without driving).

Turn off the engine. Allow it to cool, then lift the car and place it on axle stands, remove the lower plastic protection and open the drain plug, allowing it to drain into a large container: dispose of it properly (along with the filter) at an authorised centre.

Meanwhile, change the filter, which will also be full of oil, so a container will be needed here as well. Clean the mounting seat, lubricate the rubber seal with new oil and screw the filter on by hand, without overtightening; refit a new plug and a new seal to the oil sump under the vehicle, reattach the splash guard, lower the car and add new oil through the filler cap. Pour in about 90% of the required amount: leave the funnel in place.

Start the engine for 30 seconds to fill the filter, then wait a couple of minutes and check the oil level, topping up until the level is just below "max" (never above). Screw on the filler cap and you’re done.