ADias,

Yes, thats right. When I checked it the first time at 800 miles, the oil level was full. Of course I expected it to be that way. Yesterday at 3033 miles the check oil light came on. I immediately went to the auto parts store and purchased 2 quarts of oil after looking at oil level. I poured one quart and then started my car and let it run for about 45 seconds. I measured my oil level again and it still showed a low level. I waited another minute and returned the exact same reading. I turned off the engine and added another quart of oil and it finally displayed a full reading. When I got home after about 1 hour later, the reading displayed full. I will check it again when I drive it the next time to see if it is overfilled but it doesnt appear to be so.

 

My 2009 C2S was built in late November 2008 and delivered in January 2009. I followed the break-in to the letter the first 1000 miles and then would take to higher RPM's several times the second 1000 miles but only after the oil temp had come up to normal operating temp. I used just under 1 qt during the break-in. Car now has 12,500+ miles on it and over the last 4500 which included a 3000 mile trip it has used about 3/4 of a quart. I consider this good. The car has PDK and has seen 6000 RPM once or twice. I'm very happy with the new engine.

 

Mine needed .4 quart at 1000 miles, topped up (OCD I guess) and it's full at 1800 miles with moderate driving at varying speeds under 6K rpm.

I've had a 993 Carrera S (purchased used) that burned a quart every 1500 miles, a 987S I broke-in in similar fashion that used none between changes, and an 07 Gt3 that used none (except that which it leaked from its RMS!). Hard to infer causation, but I believe break-in style has an impact.

Chris

 

The thing that bothers me about the oil sensor? Here's the story.

Everything was working fine. Brought it in for normal service. I get home and check the oil only to find it's supposedly low by two bars. I add 400ml. Expected to see it go up a bar and see nothing instead. I add another 400ml and then the fun starts: again nothing shows up on the indicator! I'm somewhat miffed, I walk away and come back 15min later, try again the indicator is still showing nothing I want to see. I put car away thinking about when I can bring the car back in to have them fix it. Next day or two: I check oil and it's showing it's at a perfect level. Worked fine every time I checked oil after that. That was months ago: no problems since.

Again, these cars are computerized. You don't know what the heck is going on with them! It's like you ask them a question by checking something and they take a message and get back to you.

 

Before I changed my oil at 2500 miles I was down one bar and I did not top it off. I do too many short trips in traffic and I was very pleased with my oil consumption.

Although I have poured almost 8 qts back in I am still not reading max, the computerized oil sensor does have a mind of its own and it is driving me a little nutz.

 

The reading can be erratic and it is very sensitive to car's leveling. No oil should be added after a single reading. Oil level should be checked once a week (more often if on the road adding miles) and oil should only be added after repeated (different times) low level measurements.

 

Just want to thank everyone for their input. I took my C2S over to the dealer this morning for a software campaign, and had them check for oil leaks and there were not any. They checked everything and said that the oil usage is normal durring brake-in. I guess I am a bit surprised, because I have owned 9Corvettes between 1991 and 2009 and never have had to add even one quart of oil ever! But it's no big deal.

 

Hey Ronnie, Good that dealer checked it out. I'd still ask them where they're getting their "This is normal for your car" information. It's gotta be documented somewhere, should not be made up or word of mouth. If you feel better ask to see the documentation. Anyway: You're consumption has GOT to decrease as you put more miles on the car. Plus, you have a four year warranty covering things. Time to relax and enjoy!

 

I saw twice already reports about 997.2 engines replaced by Porsche because of over excessive oil consumption.
Also there are some people with new 997.2 cars that claim their vehicle oil level did not reduce at all during break-in time. I find all this a bit odd, but perhaps it is just new design 'feature'.

 

Nothing new. As stated on this forum many times by several multiple 911 car owners, boxer engines may use some oil (the factory spec is 1qt/600miles - I know it unsettles a lot of new owners). Some engines use a bit, others a lot, and others none. Those are the stats and it's nothing new.

 

I havent had any Porsche that use that much oil so quickly. However, I have heard of others who have used this much so I guess it is just my time to experience this as well. It shouldn't be an issue unless we choose not to check the oil on a regular basis. The manual states "check the oil each time you refuel the car." It is easy to do so that is what I will do to keep it in specs. I do notice a litlle more soot on my exhaust so I think it could be related.

 

FWIW, I have found the only reliable procedure for checking oil level is to drive home and park it on a flat surface, turn it off. Wait 10-15 minutes (take in all those groceries you put in the frunk), then re-start and check the level. Engine will still be warm and all the oil has settled where it wants to be.

 

Agreed. The measurement needs a perfectly level surface. Often, gas station bays look level but have local slopes that shift the measurement either way.

In my level garage floor my car reads full. On a local gas station (which looks level, but not quite) reads over-full in one side of the pump and 1 bar lower on the other side of the same pump.

 

My 997.1 gt3 burned very little oil, my 2009 c2s consistently burns 1 qt. every 1000 miles. these DFI motors seem to burn more oil then previous models.

 

I've seen that on mine. Park it after a drive and check it after the prescribed time and shows two bars down. let it sit overnight and its fine.