SlickOne

On a 991.1 or 991.2?

I understand a 991.1 takes ~7.5 quarts, no?

feh

991.2

HenryPcar

German cars are the only manufacturers using electronic dipstick (I think). Also heard BMW is going back to the good old dipstick on newer models, which is a blessing.

Penn4S

For me a proper fill is 1 notch below full on the indicator.

Greg D.

This is my biggest beef with modern Porsches. You took away the dipstick, fine, but then give us a digital readout that works NOW ? I understand there is a process to get a readout sooner, but it never worked for me... It takes my car 2 days to give me a readout most times. 996/987 era worked faster. 991 is abysmal.

I've learned over the years that underfilling a 911 by a quart is not gonna kill it (unless you'r eon track the next day maybe), but overfilling is messy. So underfill and be patient. I tend to recycle my old oil into older oil containers to take back to the auto parts place, so I can measure how much comes out, +/- , and refill conservatively. Then I wait till the car is good and ready. Days generally, no joke.

I truly wonder if Porsche techs don't have a special override tool that lets them know the oil level NOW. No way they can afford to wait that long in a service situation. I think Porsche is screwing us on purpose with that one.

feh

This is because of the dry sump lubrication mechanism. You get a faster readout by bringing the oil up to temperature (greater than 190F) and then after a couple ignition cycles you should get it. No need to wait on a number of miles driven.

stevenvillatoro

I’m a newbie to modern Porsches. How often is adding oil typically needed in ordinary daily driver usage? Other cars I’ve owned haven’t needed to be topped off between oil changes.

LexVan

Depends. Most do not consume any oil. A rare few do. I never need to add oil between my 5,000 mile oil changes.

trucheli

I always do 8.5 quarts on my 991.1.

iWrenchmy911

You need a PIWIS II diagnostics tool to do it correctly. When using the PIWIS for an oil change you add the base amount ~8.5 quarts, then run the system check through the DME "maintenance and repairs" section, which will return an amount to add to bring the oil to perfect fill level -- so it will tell you for example "+.9" and you add .9 liters or roughly .9 quarts as they're nearly the same.

This is how I've been doing oil changes on my porsche vehicles using my piwis II

CSK 911 C4S

I've been good as well ..... never had to add.

Porschefection

Here is my gauge after a solid warm up. Do I need to top it off or leave it alone?

Porsche_nuts

Leave it alone, it is fine.

Al.Fresco

Agreed.

Jabs1542

I change oil about 8 to 10 times per year (I track my car a LOT) and found that weighing the oil was the best way to get this right the first time. Weigh it on the way out, way it in a pour bucket on the way in, and it hits the mark every time. I then use Lex’s 200 ml increments to slightly increase the level when needed.