54 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCHHow much oil do you use?
Leading reported evidence
Replace last week
Performed · outcome unconfirmed
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
Discussions that performed work without a confirmed outcome
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Performed · outcome unconfirmed · Original poster
I must have been losing a lot out my AOS Bellow hose that I changed last week..
Leading evidence: 'Replace last week' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Recommend installing a motorsport aos' (1 discussions). For that action, 0 discussions report a resolution and 0 report an unsuccessful attempt. No action has an explicit, attributable resolution report under the current rules. These are forum reports and suggestions, not a confirmed diagnosis.
Source reports, not a diagnosis or a success probability. Counts refer to discussions and can overlap.
Replace oil during routine oil and filter services
Performed · outcome unconfirmed
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
Discussions that performed work without a confirmed outcome
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Performed · outcome unconfirmed
I have consumed as much oil in 50,000 miles to top off as I have changed oil during routine oil and filter services.
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
Discussions that performed work without a confirmed outcome
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
Discussions that performed work without a confirmed outcome
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Performed · outcome unconfirmed
This year It's not burned hardly any (gauge went down 1 dot) since I've had it's oil changed over the winter.
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
Discussions that performed work without a confirmed outcome
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Suggestion
The article I was reading on porsches concerning the oil level change didn't put any miles or kilometers to a required run to burn the water out but I'd figure a full tank plus some on the hwy's should work.
Counts describe captured discussions, not unique people or a diagnosis. Author identities are not reliably stored. Exact duplicate evidence is counted once across matching discussions; one discussion counts at most once per action/state. Multiple repairs reported together remain a combination. Suggestions and failed attempts do not establish a fix. Matches cover whole discussions and can include related faults, model variants and incomplete threads.
54 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
Rennlist: 1 discussions
0 evidence records excluded for query context · 0 excluded by outcome qualification · 0 adjusted by outcome qualification.
0 acknowledgements have no verified action link; they do not establish a repair result.
Generation: 20261026T113718Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
How much oil does your 99/996 use? Mine seems accessive.. But yet I am not smoking at all and its not leaking. On the 2 changes I have done to the car. Nothing in the filter and very little on the magnetic drain plug. Just a light coat of mouse hair fine metal on the plug.. Less than I get out of my chebby.
120,000 miles AOS maybe?
At 105,000 miles I burn no oil...I think my car is a bit rare not to consume any...but I've never added any during my changes at 10k miles and I never need to add to keep the level up.
Shawn
All my air cooled Porsches never used oil. My first water-cooled car (997S) uses a quart every 1000 miles. Has done so from the moment I picked it up at Zuffenhausen. Am currently at 48,000 miles.
1 quart in 1k miles is Porsche acceptable usage.... I know its crazy, but even the new cars, Porsche say its fine. Mine doesnt use any oil, but I change my oil every 3000 miles.... yeah Im old school.
Yeah Im old school too.. And the ol chebby v8 only burned it if you really beat the snot out of it.
I do run my cars. Being I take a fare amount of short trips, I do tach it up between the lights. This is the way i have driven all my cars and knock on wood, I have never had a major engine problem.
I do try to change every 3K But this time it got to 5 before I did it and in this 996 their is so much of it, I dont think it will hurt it to go 5... but I hear dads voice in my head to get'r done at 3K. Im going to keep my eye on it
It varies a lot with car/engine, driving style, oil, etc. The rule of thumb use to be a qt./2500 miles was excellent. Porsche and others consider more than a qt./600 miles excessive - except for racing/track use.
my bad..... Im going from memory now, I think its 1 quart in 600 miles not 1k miles..... I have a hi flow air filter so.... its 3K miles for me. Kyle, does your car smoke at start? I know what you mean about dad's voice.
Just shy of 52k miles and I change oil/filter @5k mi. I've only added a very small amount in between oil changes, but it seems every engine uses oil at varying amounts based on the input above.
hmmmm.. I do have 2 leaks. I just looked. But none enough to drip just wet.
One is dripping from the drivers side tensioner but its not the tensioner.. Just where it is ending up... Maybe from the AOS?
the other is on the passenger side rear, coming from high on the engine and ending up almost dripping off the power steering pump?????? not sure if that is the pump or not. But still.. Its not dripping so I doubt they are my issues.
Here is a story of two Porsche 996 engines. I bought a '99C4 a couple of years ago. This 3.4 engine did not use any oil between changes. It ran great for about 10,000 km (6000 miles) and I never had to add oil. Then I had an IMS bearing/shaft failure. That was the end of this engine. I purchased a 2003 3.6 X51 engine (posted on this forum some time ago). This engine has a very healthy appetite for oil. Like one liter every 2000 km (OK, let's say one quart every 1200 miles). Not always, but I often get a fair bit of blue smoke on start-up.
I used Mobil 1 0w40 in both engines. I am not happy about the oil consumption with the "new" X51 engine. But this is within the acceptable norm according to Porsche. But I am not happy about it.
...Rickker
from what I am reading my conclusion is driving habits.. But you kinda blow that up... because I would think you drive both engines the same? Yes? Im running M1 10-40
Im taking it on a 1500 mile trip this weekend.. I plan to actually watch it very close.... Maybe I just didnt fill it up all the way when I changed the oil.. But 9 qts is 9qts
I have about 12k miles on a reman engine that's been in the car for four years and I've never had to add oil between changes. I change it once a year, whether it needs it or not.
Mine burned about a quart to 2 quarts every 6k but that was last year when I was autocrossing the car quite a bit. This year It's not burned hardly any (gauge went down 1 dot) since I've had it's oil changed over the winter. I've driven it maybe a around 2k since the oil change.
Interesting, how it burns less with more leisurely driving.
My '99 w/53K miles uses .5 qt. each 3,000 miles ( one qt. between oil changes). My previous 993s (had two of them) used about twice that amount or more, especially if many short trips were the norm.
relinuca
Mine doesn't use any either - well not enough to track anyway maybe a half liter between oil changes.... Now my old air cooled.....that one liked her oil!
MY 1981 SC never used oil at all. My 77 used it only just before the engine was rebuilt. My 06 uses oil like water. I have consumed as much oil in 50,000 miles to top off as I have changed oil during routine oil and filter services. There are issues with the water cooled engines that lead to excessive oil burning that even Porsche doesn't know why. The AOS will contain the burning off of this oil in such a way that you'll never seen it smoking, but that stuff is burning off inside the engine someplace.
I thought snythetic doesn't smoke much if at all.
One thing is if the car is doing humdrum driving back and forth without some good long runs to heat and burn off water in the oil then it can be a surprise after a good trip that the oil level has gone down. The article I was reading on porsches concerning the oil level change didn't put any miles or kilometers to a required run to burn the water out but I'd figure a full tank plus some on the hwy's should work.
With the 114k+ on mine I don't think I actually burn any. It's the valve cover leak that has one tick on the gauge disappearing per 5k. Same original engine from factory.
Just a follow up
I must have been losing a lot out my AOS Bellow hose that I changed last week.. Took it 500 miles yesterday. Didnt use a drop.. not bad for 135,000 miles
Kyle, Im at 62,000 and my car uses maybe a half a quart for every 3000 miles. Now, when I track the car Ill go through a quart per 1 tank of gas. I also think my AOS is going soon... When I leave a left handed hairpin i get smoke after a few laps. Then the smoke will disapear once I get out of the throttle. This happens each time I track the car at about the 3rd lap. Another 996 at the track driver told me that under hard left hand cornering AOS are know to do this? He recommended installing a motorsport AOS. That part is $700+... Hoping i can remedy with the standard part. Anyone else have this issue?
~ 1/2-1 quart per track day...
To Hardback: I had the white puff in turns only when I had a bit too much oil (good tactic to confuse cars closing in...) Apparently the trick is to keep oil just at the low limit).
FM
I am approaching another Oil Change. I have gone just about 5000 miles since its first change on my watch. Even with a few minor leaks (plug holes - now fixed) it has only gone down one notch on the digital oil level indicator. It is hardly noticeable on the dipstick. I am guessing that if I took it out for a good thrashing (in 2 weeks an Auto X day) the condensation accumulated over the winter months will burn off and the real consumption will be a bit more - but still quiet good compared to my earlier Air Cooled 911's. My Watercooler 968 never shows oil usage in the 5k change cycle I follow. Both cars have about the same 75,000 miles on the original engines.
