Oil Change on the Porsche Boxster S

The Porsche Boxster S had not really had a full oil change since I procured it. After having driven it about a few hundred miles over the last year, I finally found time and decided to change the oil and the oil filter. ECSTuning.com was running a sale on the LiquiMoly 0W-40 oil change kit along with the OEM Hengst Oil Filter for under $100 with free shipping, so I purchased the kit. This post is to show how to do the oil change. It is quite simple.

CAUTION: The old oil should be considered very toxic, so it is advised to use gloves to do the work.

Step 1: Run the car for about 10 minutes till the engine warms up and the oil temperature reaches the mid-level as per the dashboard. This will increase the viscosity of the old oil and will let it flow out faster. If you are unable to start your engine, that is ok, continue to the next step.

Step 2: Raise the rear of the car on jack stands safely. You will need a low profile 3 ton jack to raise the car up, and also 3 ton jackstands.

Figure 1. Raise the car on jack stands Figure 1. Raise the car on jack stands

Step 3: Open the oil filler cap in the rear trunk of the car (Figure 2) so that the oil will flow out more freely.

Figure 2. Open oil filler cap Figure 2. Open oil filler cap in the rear trunk

Step 4: Using an 8mm hex socket and a breaker bar loosen the oil drain plug at the bottom of the car (Figure 3).

Figure 3. Open oil plug Figure 3. Open oil drain plug with 8mm hex socket and breaker bar

Step 5: Place an oil drain pan below the drain plug before taking it out fully (Figure 4).

Figure 4. Oil collector pan Figure 4: Place oil collector pan below the drain plug area

Step 6: Now remove the full drain plug and let the oil flow out (Figure 5). The oil will take about 30-40 minutes to fully drip out.

Figure 5. Oil flowing out Figure 5. Oil flows out

Step 6: Clean the oil drain plug (Figure 6) with a shop towel before tightening it back in with a new washer (Figure 7). Torque the drain plug to 50 Nm (37 ft-lbs).

Figure 6. Oil drain plug Figure 6. Oil drain plug

Figure 7. Oil drain plug washer Figure 7. Oil drain plug washer

Step 7: Now using a 74mm oil filter wrench (Figure 8) which we purchased for around $6 from Advance Auto Parts and a ratchet open the oil filter housing that’s visible clearly below the car (Figures 9 and 10).

Figure 8. 74mm 14 flutes oil filter wrench Figure 8: 74mm Oil filter wrench

Figure 9. Oil filter housing Figure 9: Oil filter housing to be opened with the wrench

Figure 10. Oil filter housing open with wrench Figure 10: Oil filter housing being opened with the 74mm wrench

Step 8: Place the already full oil drain pan below the oil filter before taking off the housing.

Step 9: Now take off the housing by twisting it anti-clockwise and expose the old filter (Figure 11). Take off the old filter once it has stopped dripping oil.

Figure 11. Old oil filter Figure 11: Old oil filter

Step 10: Let’s open the Hengst Oil Filter box (Figures 12, 13 and 14) that came with our kit.

Figure 12. OEM Hengst Oil Filter box Figure 12: OEM Hengst Oil Filter box

Figure 13. OEM Oil Filter inside box Figure 13: OEM Hengst Oil Filter inside the box

Figure 14. OEM Oil Filter O-Ring (gasket) inside box Figure 14: Oil filter housing O-Ring (Gasket) inside the box

Step 10: Take off the old O-ring (gasket) from the oil filter housing (Figure 15) using a flat screw driver. Replace it with the new O-ring that came from the box (Figures 14 and 16) after applying some fresh 0W-40 oil to the O-ring, and install it tightly as shown in Figure 17.

Figure 15. Old O-ring (gasket) on filter housing Figure 15: Old O-ring (gasket) on filter housing

Figure 16. New O-Ring for filter housing Figure 16: New O-ring (gasket) for filter housing

Figure 17. Lubricated new O-Ring installed on filter housing Figure 17: Lubricated new O-ring (gasket) installed on filter housing

Step 11: We chose the SAE 0W-40 rated oil from LiquiMoly for our task. The Boxster needs 8.875 litres of oil and the oil cans come with markings to make sure you can correctly pour the right amount in. You will need a funnel to do this. Each canister contains 5 litres of oil, so you need two of them.


Step 12: Fill up half the filter housing with fresh oil as shown in Figure 18.

Figure 18. Fill half the filter housing with fresh oil Figure 18: Fill half the filter housing with fresh oil

Step 13: Install the new oil filter in the slot where it should be (Figure 19) and then cover it with the filter housing that has been half filled with oil. After you do this it should look like Figure 9.

Figure 19. Install filter in the slot Figure 19: Install the filter in the slot

Step 14: Tighten the oil filter housing using the oil filter wrench (Figure 10) and torque the oil filter housing to 25Nm (19 ft-lbs).

Step 15: Pour 8.875 litres of SAE 0W-40 oil using a funnel into the oil filling hole in the rear trunk (Figure 2). Close the cap once done.

Step 16: Take the car off the jack stands safely and level the car on the ground.

Step 17: Start the car and check for any leaks all over. Drive the car for about 10-15 minutes to make sure the oil has reached all portions of the engine and check for leaks again.

The oil change is now complete. Dispose of the old oil at an auto-parts store that accepts oil for recycling.