Jeff928S4

When checking my oil level last night, it appeared to be down a litre or maybe more. The car was sitting on a pretty flat surface. If it was an incline, it was very slight.

I add 1 litre of oil and it is still not on full (note, all oil checks done on cold engine).

Drive to the gas station, get gas, check oil again and it's above full - it's past the full mark and sits on the first "twist" on the stick. Went for a drive and noted the oil pressure was the same as before the adding of oil.

Would overfilling too much cause the oil pressure to peg high all the time? Once the car was warmed up, the oil pressure sat just above the "2" mark on the gauge. Didn't notice any changes in the cars performance.

Is this mark on the stick (the first twist) too much? Since the last oil change, I've driven around 3000-3500 klms, so I'd figure I burned some off, no? Maybe a 1/2 litre, which would mean I'm 1/2 litre overfilled, which I heard is ok.

If this is too much, do I just drain some out of the oil drain plug?

Jeff

Gretch

everything expands when heated...................

heinrich

Overfilling is not a good thing. For one it causes more oil to be in constant contact with your crank. I'd drain some. Also, it raises oil pressure effectively in the crankcase because there is less air. You may find oil leaking or seeping where it was fine before. On 911's it is common for oil to spill out of the crankcase when overfilled, and actually this can cause damage in 928 and 911 and really all cars.

heinrich

Btw be careful on checking level. When the car is cold and unstarted oil level is best measured. When you start and run before the engine is hot, a lot of loil is where it needs to be to do its job, up there in the heads and elsewhere. That is a bad time to check level as I believe you did (and I have too in the past). Check either unstarted or hot oil levels.

Jeff928S4

So, if my oil pressure is fine, should I be ok??? Like I said, it sits just above "2" when the car is warmed up.

heinrich

Drain some.

Jeff928S4

Ok.

Any chance there is a quicker way than removing the belly-pans and using the drain plug?

AO

1. Start the engine.
2. Take a stick and prop the accelerator all the way down.
3. Run idle at full throtle and walk away.
4. When you hear the engine grenade (who knows when...?) Oil will no longer be a problem....

Have fun!

Cheers!

Jeff928S4

I've yet to drain any oil from this car.....any tips?

Do I simply loosen the drain plug and allows some to come out?
Will it be difficult to tighten the screw (after I drain enough oil) with oil passing by it?

Jeff

AO

Not really. A bit messy, but it will clean up. Don't worky about getting your hands dirty. Are clean hands really worth a broken engine????? It's your choice... OF course you could always pay someone else to do it for you, but what fun would that be?

GRGGOODSPEED

Take off the oil filter and empty it.

Garth S

First, be absolutely sure of the oil level: as others have said, car level, oil cold, dipstick in correctly ( yours has the broken base).
Another way to withdraw some oil, and avoid the belly pan thing - is to get a suction device and a length of 1/4" tygon tubing. Insert the tube into the dipstick tube, and suck/pump/aspirate etc to correct the level.

Randy V

Definitely remove the excess - if not, you experience significant blow-by resulting in smoke at the exhaust and oil contaminating your air filter.

Use the method that Garth describes - very easy.

You can get an oil extraction pump with small-diameter tubing that will fit into the dipstick at most auto parts and marine suppliers.

GRGGOODSPEED

pump - 40 bucks
removing oil filter - free

Randy V

It's very easy to make your own extraction device using a shop vac, a couple pieces of hose, some plumbers putty, duct tape and an empty pickle jar.

If you've ever had Chemistry 101 lab, you'll figure it out.