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Board: Porsche - Cayenne
Language: English
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Re: Add oil light & "service in 1000 miles" lights...
No, it's not normal. That light came on for me at 18k miles. I've never seen the "add oil" light. As far as I can tell, I have had no discernable oil usage. That's after 25k miles and two oil changes. I know others have greater oil consumption but I have heard of no one needing oil at 2k miles. You need to have this checked by the dealer.
Re: Add oil light & "service in 1000 miles" lights...
My practice has always been to check the oil level at each fuel fill. So, when the vehicle was new, I watched as the level gradually approached the minimum mark.
At 2,000 miles, it reached the minimum mark and the oil level lamp illuminated. Then, the same thing happened at 9,000 miles.
My impression is that the difference in miles prior to adding oil has to do with the starting point. When new, the level started below half on the dip stick.
At 2,000 miles, it reached the minimum mark and the oil level lamp illuminated. Then, the same thing happened at 9,000 miles.
My impression is that the difference in miles prior to adding oil has to do with the starting point. When new, the level started below half on the dip stick.
Re: Add oil light & "service in 1000 miles" lights...
Quote:
When new, the level started below half on the dip stick.
Hmm ... sloppy dealer prep? Mine was exactly on the full mark when I bought it. On the two oil changes they have done since then they have overfilled by about 1/4 quart!
Re: Add oil light & "service in 1000 miles" lights...
Isn't it acceptable to have the level between the minimum and maximum marks?
My preference would be to have the level in the operating range instead of 1/4 quart over. There are few nice solutions to that type of sloppyness. Given that the vehicle holds 9 quarts, the 1/2 quart to bring it to the max seems insignificant.
My preference would be to have the level in the operating range instead of 1/4 quart over. There are few nice solutions to that type of sloppyness. Given that the vehicle holds 9 quarts, the 1/2 quart to bring it to the max seems insignificant.
Re: Add oil light & "service in 1000 miles" lights...
I disagree. Whenever I have changed oil in my own vehicles I have always been very careful to refill to exactly the full mark. I expect no less from a Porsche service department. Both overfilling and underfilling is sloppy. 
The quality of engineering in Porsche vehicles deserves more respect than that.
The quality of engineering in Porsche vehicles deserves more respect than that.
Re: Add oil light & "service in 1000 miles" lights...
Quote:Isn't overfilling when the level is above the maximum and underfilling below the minimum?
GM Austin said:Both overfilling and underfilling is sloppy.
Doesn't Porsche state that it is acceptable to have the level between the marks? Why would it be better to have a technician follow a hit or miss procedure to bring the level, right to the max, with the possible or likely outcome of overfilling the level?
It is my understanding that an oil change is not part of the vehicle preparation.
Re: Add oil light & "service in 1000 miles" lights...
In my view, when an oil change is performed, not filling to the maximum is underfilling. Yes, anywhere between the marks is an acceptable oil level but what would be the purpose in filling it to anything less than the maximum? The vehicle will only consume oil, not create additional oil, so filling to the maximum will allow the vehicle to be operated for the longest period of time before it again needs attention. Filling to less than maximum only reduces that time before your car again needs oil. Filling to the maximum is hardly rocket science either.
Re: Add oil light & "service in 1000 miles" lights...
Quote:The purpose is to conform with documented Porsche service and maintenance procedures. The other purpose is that if the level is set between the marks and additional oil is added only when the minimum is reached, then one full quart may be safely added without risk of overfilling.
GM Austin said:Yes, anywhere between the marks is an acceptable oil level but what would be the purpose in filling it to anything less than the maximum?
The alternative creates risk without benefit. So, until Porsche issues a "respect the dipstick" TSB I will continue to add oil only when the level is at the minimum.
Is this a possible explanation as to why your vehicle had too much oil at the last changes?
Re: Add oil light & "service in 1000 miles" lights...
Quote:
Is this a possible explanation as to why your vehicle had too much oil at the last changes?
????? I have never added oil to my Cayenne. I'm not sure what you mean. It has too much oil because the dealer overfilled, which is also a mistake, in my view.
My only point here is that the oil level should be at maximum on the dipstick, no more and no less, when the oil is changed. This is not a difficult task.
I am not suggesting that anyone constantly keep their oil topped off to the full mark. This would certainly only need to be done when it reaches the low mark.
Let's say your car uses one quart every 5000 miles. Your dealer changes your oil and fills it to within 1/2 quart of maximum. This means you have to add oil in 2500 miles. If it had been filled completely at the time of the oil change you would go another 2500 miles before your oil needed attention.
Or another example, if your Cayenne's consumption rate was one quart every 20k miles, you would never need to add oil if the dealer always filled to the full mark.
Food for thought.
Maybe in a car that doesn't consume oil between oil changes it isn't essential to fill the oil to the max mark but as you all probably know, the flat six engines will consume a certain amount of oil. On my Turbo, I couldn't imagine it not being brought up to the full mark at an oil change. Is it so difficult to put in less than a quart/litre of oil? I personally am pretty capable of using the little marks on the side of the jug to judge how much oil is going in. If the oil is down half a quart/litre then it is easy enough to add half a quart/litre. There shouldn't be any issues of overfilling. In fact, if I was going to take a long trip then I would definitely bring the oil up to maximum before I left as a way of reducing how much extra oil I had to carry. Easier to carry it in the sump than it is in the jug.
My Turbo has a dry sump so it is less of an issue but on non-dry sump cars if you corner them hard then you are wise to keep the oil full so as to reduce the possibility of the engine running out of oil at the pickup(s). I have heard that this is a potential problem on the 996.
Another reason to keep the oil full is heat dissipation. Oil is used for cooling and the more there is, the more heat can be dissipated through the sump and the slower the oil temperature should rise and fall.
Oh, you are wrong GM about the oil level never rising. Pollutants, especially unburned fuel, can increase the volume. I had one sample that contained 8.8% fuel. On a 12 litre system that's more than 1 litre of fuel. So when people think that their oil level has remained constant, in fact what has happened is that the amount of oil in the sump has decreased and that volume has been replaced by contaminants. Food for thought!
Stephen
My Turbo has a dry sump so it is less of an issue but on non-dry sump cars if you corner them hard then you are wise to keep the oil full so as to reduce the possibility of the engine running out of oil at the pickup(s). I have heard that this is a potential problem on the 996.
Another reason to keep the oil full is heat dissipation. Oil is used for cooling and the more there is, the more heat can be dissipated through the sump and the slower the oil temperature should rise and fall.
Oh, you are wrong GM about the oil level never rising. Pollutants, especially unburned fuel, can increase the volume. I had one sample that contained 8.8% fuel. On a 12 litre system that's more than 1 litre of fuel. So when people think that their oil level has remained constant, in fact what has happened is that the amount of oil in the sump has decreased and that volume has been replaced by contaminants. Food for thought!
Stephen
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