Porsche 718 Forum banner

A mystery! I need help with disappearing oil.

6387 Views 12 Replies 9 Participants Last post by  HooosierDaddy
I decided to change oil in my '18 718 after 500 mi. I decided on 5W-50 Amsoil full synthetic an approved viscosity). Manual says 6 qts, which I assume includes filter.

I drained the oil, replaced the filter, and added 6 qts Amsoil. After driving a couple of miles, I got a dash message that said I have too much oil in engine and that I should get it checked by dealer pretty soon (didn't sound like an emergency). I tried to suck out some oil thru the filler hole, using a flexible plastic hose abt 1/4" diameter. No luck, not a drop. Phooey, sez I (or something like that).

So it's back up on the hoist, remove drain plug over a clean container. All that would come out was 1 cup (1/4 qt.). SAY WHAT?!

I tried blowing gently into the filler neck, no luck. I tried vacuuming from the drain plug. No luck. I tilted the front of the car up about a foot, no luck. Then the rear up, no luck.

So I went out for a 10 mi. drive at speed to see what would happen. I was on the expressway, so I used earplugs. No signs of anything amiss (e.g. smoke from exhaust). But when I got off the expressway, I took out the earplugs and noticed a loudish whine, proportional to RPM. Never heard it before. I guessed it might be oil pump noise. Or? Manual says that too much oil can cause cat damage. Oil temp and oil pressures were normal.

So, guys, where's the oil? It's trapped in the engine somewhere. Where? I assume this is a wet sump engine. If not, is the oil trapped in a tank?

Obviously, I can -- and will if I can't get some oil out -- call the dealer. But really! Oil's gotta be in there somewhere.

I didn't used to believe in black magic, but now, I'm not sure.

1 - 1 of 13 Posts
Check out this fellow's instructions.

You could have an air block somewhere, and that whine might be the turbo starved of oil. At this point I would have the car towed to a dealer or reputable independent shop. If you are not really confident about what you are doing, you are risking a $15-20K engine, and maybe a transmission.

These are relatively new engines, and there are not a lot of available DIY guides, videos, and documentation.

I'm not sure why you wanted to change the oil at 500 miles. Is there something you know that the engineers at Porsche don't? They recommend the first oil change be done at 10K miles or 1 year, and for 2018 models this first service is included with the initial purchase price. Also the factory recommended oil, which originally came in your car, is Mobil-1 SAE 0W-40 (and for warmer climates 5W-40/50). It can be very risky to mix incompatible oils and brands.

Best of luck - we all wish you and your car well!
1 - 1 of 13 Posts
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.