Notices
993 Forum 1995-1998

RE: checking oil level with engine running

Old Sep 2, 2022 | 07:28 PM
  #1  
crw's Avatar
crw
Thread Starter
Rennlist Member
 
Joined: Nov 2009
Posts: 1,522
Likes: 358
Default RE: checking oil level with engine running

Start, let it run for a while, check dipstick.

Can you get a wrong reading if checking it after a spirited run?
Reply
Old Sep 2, 2022 | 09:20 PM
  #2  
95_993's Avatar
95_993
Rennlist Member
15 Year Member
 
Joined: Sep 2007
Posts: 4,512
Likes: 827
From: Massachusetts
Default

Originally Posted by crw
Start, let it run for a while, check dipstick.

Can you get a wrong reading if checking it after a spirited run?
Start it, let it get to operating temperature, check the dipstick at idle. No difference after a spirited drive.
Reply
Old Sep 2, 2022 | 09:51 PM
  #3  
Edward's Avatar
Edward
Addicted Specialist
Rennlist Member
20 Year Member
 
Joined: Jun 2001
Posts: 6,242
Likes: 438
From: So.CA
Default

Originally Posted by crw
Start, let it run for a while, check dipstick.

Can you get a wrong reading if checking it after a spirited run?
Most already know this, but in case some don't: once the thermostat opens (when you see the temp needle suddenly drop), this opens up the entire cooling system to the engine. Now is when you get the entire quantity of oil up to temp, and this will be your accurate reading. But spirited driving or not, your oil dipstick tells you where you are so long as the car is idling on level ground. FWIW, I keep the level around halfway or lower on the dipstick to allow for expansion in the tank and a hedge against barfing oil out the filler cap.

Edward

Last edited by Edward; Sep 2, 2022 at 09:55 PM.
Reply
Old Sep 3, 2022 | 04:44 AM
  #4  
Radmd74's Avatar
Radmd74
Racer
5 Year Member
 
Joined: Nov 2018
Posts: 323
Likes: 13
Default

Originally Posted by Edward
Most already know this, but in case some don't: once the thermostat opens (when you see the temp needle suddenly drop), this opens up the entire cooling system to the engine. Now is when you get the entire quantity of oil up to temp, and this will be your accurate reading. But spirited driving or not, your oil dipstick tells you where you are so long as the car is idling on level ground. FWIW, I keep the level around halfway or lower on the dipstick to allow for expansion in the tank and a hedge against barfing oil out the filler cap.

Edward
any good tips on a clean wipe of the dipstick before reinsertion? Microfiber towel, paper towel? Hesitant to just use random anything as we know oil is the lifeline circulating in the 993 system.
Reply
Old Sep 3, 2022 | 08:31 AM
  #5  
PFDGSB's Avatar
PFDGSB
Pro
5 Year Member
 
Joined: Jun 2019
Posts: 518
Likes: 153
Default

Originally Posted by Radmd74
any good tips on a clean wipe of the dipstick before reinsertion? Microfiber towel, paper towel? Hesitant to just use random anything as we know oil is the lifeline circulating in the 993 system.
You want advice on what to wipe the dipstick with? Wow. I take care of my cars but this is next level!

Use a paper towel or shop rag.
Reply
Old Sep 3, 2022 | 08:53 AM
  #6  
rlme36's Avatar
rlme36
Burning Brakes
10 Year Member
 
Joined: Sep 2012
Posts: 1,243
Likes: 74
Default

i've been using the my cashmere overcoat sleeve, good to know there are other options.
Reply
Old Sep 3, 2022 | 08:59 AM
  #7  
uniquenamehere's Avatar
uniquenamehere
Three Wheelin'
10 Year Member
 
Joined: May 2011
Posts: 1,496
Likes: 332
From: Ontario, Canada
Default

Originally Posted by rlme36
i've been using the my cashmere overcoat sleeve, good to know there are other options.
LOL... porsche people take it to the next level.
Reply
Old Sep 3, 2022 | 09:32 AM
  #8  
P-daddy's Avatar
P-daddy
Rennlist Member
15 Year Member
 
Joined: Nov 2010
Posts: 7,015
Likes: 525
From: MD
Default

C’mon fellas, nothing but the best- Charmin Ultra
Reply
Old Sep 3, 2022 | 12:11 PM
  #9  
Kein_Ersatz's Avatar
Kein_Ersatz
Rennlist Member
15 Year Member
 
Joined: Sep 2008
Posts: 3,433
Likes: 420
From: Flyoverland - Central, Ohio
Default

Oil expands with temp, without a proper warm up, overfills (1) are easy to do by interpreting the dipstick is reading low on oil that is not yet "hot". Then a spirted drive could uncover an overfill condition.

On my track 993, I have added an oil catch can in place of the oil to intake breather / vent (19). It is insightful how much oil vapor spirted driving will generate or how much a "full" oil tank can puke. I have come to see the purpose for proper dipstick level reading is to prevent overfill from the maintenance cycle variance in oil drain / change / refill (lots of variables), and then use dipstick to monitor oil level for use/loss (hopefully very little). Lubrication is more about pressure, oil quality, and staying above minimal volumes (don't starve pump) (15). Oil tank volume range can vary quite a bit and still achieve sufficient lubrication, the focus on getting the tank level right / sufficient is more about cooling / keeping the oil within its operating temperatures (6 & 7 & 17) (as to not break down chemically prematurely thus losing the lubrication benefits).

Not seen much in the forums on the topic, but an oil catch can "mod" could be added insurance to diminish the effects of / catch an oil change tank over fill, but one more thing to monitor / maintain.



Reply
Old Sep 3, 2022 | 12:18 PM
  #10  
EckFe1's Avatar
EckFe1
Pro
15 Year Member
 
Joined: Dec 2007
Posts: 578
Likes: 57
From: was: CA, 956XX
Default

Any pics of your catch can?
Mounting?
Thanks
Reply
Old Sep 3, 2022 | 12:24 PM
  #11  
P-daddy's Avatar
P-daddy
Rennlist Member
15 Year Member
 
Joined: Nov 2010
Posts: 7,015
Likes: 525
From: MD
Default

Originally Posted by EckFe1
Any pics of your catch can?
Mounting?
Thanks
+1
Reply
Old Sep 3, 2022 | 12:41 PM
  #12  
MB965's Avatar
MB965
Rennlist Member
20 Year Member
 
Joined: Nov 2001
Posts: 484
Likes: 80
Default

Originally Posted by EckFe1
Any pics of your catch can?
Mounting?
Thanks
I have a similar catch can set up to Kevin's, on my 4 liter 993.
Mounted in the right rear wheel well.


Reply
Old Sep 3, 2022 | 01:13 PM
  #13  
rlme36's Avatar
rlme36
Burning Brakes
10 Year Member
 
Joined: Sep 2012
Posts: 1,243
Likes: 74
Default

love the cone. Thats contact experience right there aka. Im tired of stabbing my self with this thing when walking by and it right up there with track car tow hooks that always bit the shins.
Reply
Old Sep 3, 2022 | 05:27 PM
  #14  
Holger3.2's Avatar
Holger3.2
Rennlist Member
10 Year Member
 
Joined: Feb 2013
Posts: 1,035
Likes: 373
From: Dubai
Default

Got a nice little catch can in the engine bay


Reply
Old Sep 3, 2022 | 06:10 PM
  #15  
MB965's Avatar
MB965
Rennlist Member
20 Year Member
 
Joined: Nov 2001
Posts: 484
Likes: 80
Default

Originally Posted by rlme36
love the cone. Thats contact experience right there aka. Im tired of stabbing my self with this thing when walking by and it right up there with track car tow hooks that always bit the shins.
Imagine my pain if my wife hit that jack handle!
Reply

Thread Tools
Search this Thread

All times are GMT -3. The time now is 01:50 PM.