Update on my extra oil consumption
05-18-2016, 11:13 AM
#46
Racer
Thread Starter
So I got the car back and have driven it a few times. I do seem to notice a tad more throttle response and a tad more oomph. I am wondering whether replacing the AOS has allowed me to get the full 345 HP.
FYI, I really don't open it up and take it past 4500 RPMs. City and Freeway driving in Raleigh isn't too conducive to really opening it up. Though I have seemed to see better performance in the 2500 and up RPM range (and I know the variocams kick in at 3k).
Am I imagining this, or is there some truth here?
FYI, I really don't open it up and take it past 4500 RPMs. City and Freeway driving in Raleigh isn't too conducive to really opening it up. Though I have seemed to see better performance in the 2500 and up RPM range (and I know the variocams kick in at 3k).
Am I imagining this, or is there some truth here?
05-18-2016, 12:39 PM
#48
You really ought to try and get the car into higher revs occasionally. I'm not saying you need to redline it at every freeway on ramp, though you're not going to hurt it...
Years ago I use to be "gentler" with my cars until one day the car ran like crap (wasn't a Porsche but still applies). Mechanic told me to get the RPMs up much higher than I was doing. The car had 160,000 miles and I was being timid.
Since then I've heard on more than one occasion, particularly from Porsche techs, that it is actually good for the engine to drive it hard (once up to temperature).
I also learned from a well respected tech here in Phoenix that on some of the older 911s, the fuel injectors don't fully open until past 5000 RPM and foot to the floor.
Find some place where you can open her up.
Years ago I use to be "gentler" with my cars until one day the car ran like crap (wasn't a Porsche but still applies). Mechanic told me to get the RPMs up much higher than I was doing. The car had 160,000 miles and I was being timid.
Since then I've heard on more than one occasion, particularly from Porsche techs, that it is actually good for the engine to drive it hard (once up to temperature).
I also learned from a well respected tech here in Phoenix that on some of the older 911s, the fuel injectors don't fully open until past 5000 RPM and foot to the floor.
Find some place where you can open her up.
05-18-2016, 02:10 PM
#49
Three Wheelin'
There is no need for a high-speed road section to wind the engine out.
I have never understood this as a limiting factor into why one cannot stretch an engine's legs. These aren't single-geared creatures.
.
I have never understood this as a limiting factor into why one cannot stretch an engine's legs. These aren't single-geared creatures.
.
05-18-2016, 02:13 PM
#50
Burning Brakes
You really ought to try and get the car into higher revs occasionally. I'm not saying you need to redline it at every freeway on ramp, though you're not going to hurt it...
Years ago I use to be "gentler" with my cars until one day the car ran like crap (wasn't a Porsche but still applies). Mechanic told me to get the RPMs up much higher than I was doing. The car had 160,000 miles and I was being timid.
Since then I've heard on more than one occasion, particularly from Porsche techs, that it is actually good for the engine to drive it hard (once up to temperature).
I also learned from a well respected tech here in Phoenix that on some of the older 911s, the fuel injectors don't fully open until past 5000 RPM and foot to the floor.
Find some place where you can open her up.
Years ago I use to be "gentler" with my cars until one day the car ran like crap (wasn't a Porsche but still applies). Mechanic told me to get the RPMs up much higher than I was doing. The car had 160,000 miles and I was being timid.
Since then I've heard on more than one occasion, particularly from Porsche techs, that it is actually good for the engine to drive it hard (once up to temperature).
I also learned from a well respected tech here in Phoenix that on some of the older 911s, the fuel injectors don't fully open until past 5000 RPM and foot to the floor.
Find some place where you can open her up.
Also, its a Porsche, the power isn't even there until almost 4k RPMs, once warmed up you should be living in the 4-6k area.
06-29-2016, 11:13 PM
#51
Racer
Thread Starter
Update, I have been driving the car for a little over a month after we had the AOS replaced. I have driven the car about 700 miles since we started monitoring the oil consumption at the dealership.
They replaced the AOS about 200 miles into the test and I measured at 3 bars then. Now after a month and about 500 miles or so, I am down to registering one bar. The car does seem to have better throttle response, though my tailpipes are still getting somewhat sooty as well (evenly on both sides).
With this info I contacted the dealership and also inquired about changing the piston rings. They said they would check. When I heard back they could not verify a bulletin on changing the piston rings. They said they would like to get the car in and do a full diagnosis which may be complete breakdown of the engine which may take at least a month. The SA did say they would do a leak down, compression test and a bore scope. ( I recall in a previous thread, Jake mentioned leak down and compression will not help here.)
This will be a long process as the tech they want to do this won't be available until mid August. I'm ok with this as they will give me a loaner and I have CPO and they have acknowledged all of this will be covered under warranty.
Thoughts?
They replaced the AOS about 200 miles into the test and I measured at 3 bars then. Now after a month and about 500 miles or so, I am down to registering one bar. The car does seem to have better throttle response, though my tailpipes are still getting somewhat sooty as well (evenly on both sides).
With this info I contacted the dealership and also inquired about changing the piston rings. They said they would check. When I heard back they could not verify a bulletin on changing the piston rings. They said they would like to get the car in and do a full diagnosis which may be complete breakdown of the engine which may take at least a month. The SA did say they would do a leak down, compression test and a bore scope. ( I recall in a previous thread, Jake mentioned leak down and compression will not help here.)
This will be a long process as the tech they want to do this won't be available until mid August. I'm ok with this as they will give me a loaner and I have CPO and they have acknowledged all of this will be covered under warranty.
Thoughts?
Keep us in the loop....
06-29-2016, 11:57 PM
#54
Racer
Thread Starter
06-30-2016, 12:36 AM
#55
Following this thread with interest. 1200 miles since last oil change and had to ad 1.5 quarts. Still have 20 months left on CPO so will monitor until next oil change at 15K miles. I will have the dealer do that one since that will be the scheduled 10K mile change.
08-22-2016, 06:16 PM
#56
Racer
Thread Starter
So I took my car in this morning for them to do the in depth analysis. They told me they do see oil in cylinder one. They will know more when Germany further analyzes the results.
My question now is if they replace my engine will that result in any devaluation of the car long term?
My question now is if they replace my engine will that result in any devaluation of the car long term?
08-22-2016, 06:22 PM
#57
Pro
So I took my car in this morning for them to do the in depth analysis. They told me they do see oil in cylinder one. They will know more when Germany further analyzes the results.
My question now is if they replace my engine will that result in any devaluation of the car long term?
My question now is if they replace my engine will that result in any devaluation of the car long term?
08-22-2016, 10:09 PM
#58
What is normal consumption? I have a 30 minute commute at highway speeds with several sections where the RPMs are over 4k.... 2008 C2s... I wait for oil temp to be around 200 before I go above 4k. I just bought it with 17K miles and had to add .5 quart after 1k miles...
08-23-2016, 11:59 AM
#59
Three Wheelin'
Nothing to be concerned with. You have to keep tracking the usage. You might have burned off some water, etc. If you drive it like you're supposed to, and wring it out regularly, you might go 2,000 miles and add nothing, as you're keeping water content in the oil nice and low.
.
.
08-23-2016, 12:03 PM
#60
