Valvefloat991

Brilliant.

Churchill

This concern is misplaced. If you want cleaner oil in your engine, simply increase the frequency of oil changes.

The change interval recommended by the factory is not unaware of the fact that X amount of old oil remains in the engine after drainage. That older oil isn't harming your engine -- in fact all the oil in your engine was that oil before drainage. The small amount that remains doesn't become radioactive poison because you did an oil change. It simply becomes diluted by a significant amount of new oil. If a ratio (just pulling out random numbers here) of 5:1 fresh oil to old oil makes you uncomfortable, then drain & refill at 2500 miles and you'll have a 10:1 ratio, and so on.

But this is all a little silly. Your engine is fine. In fact the oil in modern engines is remarkably more clean and effective than in the recent past. The oil itself is superior (synthetic vs dino), and because of the precision of fuel injection and engine management technology the oil isn't contaminated with gasoline like it used to be, and our engines aren't run at widely varying operating temps like they used to be. Ever change the oil in an old carbureted 911 and smell the gas in it?

Everyone please relax.

Valvefloat991

It's not like this is keeping me up at night, but the ratio of new oil to old oil isn't a random 5:1, it's 8 liters to 5, or more like 3:2. I agree that Porsche has considered this in its design, but I would still submit that when one does an oil change, there's a reasonable expectation that you are changing most of the oil, not a mere plurality of it.

Keep in mind, these are also the same engineers that design the infamous IMS bearings in the M96 engines. Porsche engineers are very good, but they are hardly infallible.

Jabs1542

Does no one make a magnetic insert for the plastic plug? My 991.1 uses a magnetic insert inside of a proper drain plug (which I believe is aluminum). While I'm not positive about the aluminum I am positive about the insert because it was quite visible when I first received it, looked like a smaller diameter magnet pressed into the hollowed out shank of the plug.

I got mine at Suncoast.
https://www.suncoastparts.com/product/PKMAGNETIC.html

Valvefloat991

Haven't seen one. And the top of the drain plug is flat, so I don't think I'd try to glue a magnet there.

JDWight

bkrantz- just used your write-up and it was spot on. Thanks very much.

For reference, I used race ramps under the rear only and needed 9.5 qts. to get slightly above the mid range on the oil quantity measurement screen.

Used Mobil 1 0w40. I know some are using 5w50 and am curious the reasons, climate, use, dealer rec., etc.

trucheli

How do you torque a plastic drain plug and what's the torque spec?

Valvefloat991

No torque spec. You simply stick a screwdriver or similar item in the slot of the plug and turn it until it snaps closed. It's less than one turn as I recall.

trucheli

Convenient. One part of my brain says, do not trust a plastic drain plug, the other part tells me, German engineering at its best.

Time will tell.

bkrantz

JD, I think your 9.5 qts is closer to correct. Soon after I filled with 8 I had to add another to get into the mid-range.

feh

Thank you for the write up. I didn't realize the air intake duct needed to come out, but it all seems easily replaceable. Love the close up shot of the plastic oil drain plug and the plastic oil pan, amazing engineering right there by Porsche.

bwiele

Thank you for creating this thread with all the details. As a result, I will now do an oil change of my own around 2k miles just for peace of mind. I just ran to the garage and confirmed that my panamera also used 0W-40 oil, so I already have 4 quarts available! I'll order the kit from suncoast and the drain plug tool. I have a lift in my garage where the car lives anyway, so this will be pretty easy. Thank you again for dedicating the time to help many others of us with the same project! Good on you!

Valvefloat991

The oil pan is engineered by Porsche. I think the drain plug is a standard VW corporate part that has been used on Golfs and Audis for a few years.

Madisongy

How will you reset the warning message? I've heard that if you can get the dealer to cooperate and reset for you, it would be maintained on the cars vehicle history report. Not sure how many dealers would cooperate.

porsche42

You can buy Durametric software that can reset it for you. Some dealers might do it for free.