Mystery oil consumption fixed.
Discussion
I'm stumped on this.
Bought a 2006 c4s from OPC. Regular as clockwork, for 3k miles, it used 1 litre per 1000 miles.
It went back in for a few bits including this to be looked at. Car is there for a week. OPC say nothing wrong with the engine, top it up and say keep an eye on it.
Done another thousand miles, my usual driving pattern, and it hasn't used a drop.
I'm very glad.. but stumped?
Bought a 2006 c4s from OPC. Regular as clockwork, for 3k miles, it used 1 litre per 1000 miles.
It went back in for a few bits including this to be looked at. Car is there for a week. OPC say nothing wrong with the engine, top it up and say keep an eye on it.
Done another thousand miles, my usual driving pattern, and it hasn't used a drop.
I'm very glad.. but stumped?
Acf69 said:
Maybe they tightened the sump plug 
Maybe it was something that simple.. didn't notice any leaks on the drive way though. Scared myself silly with all these scored bore threads etc.. so was very reassured by the warantee. Don't think I'd dare buy one without one.
Just a bit gutted they didn't manage to get the annoying buzz from somewhere on the dashboard, beginning to think I may have to live with that one!
richardrsc said:
I'm stumped on this.
Bought a 2006 c4s from OPC. Regular as clockwork, for 3k miles, it used 1 litre per 1000 miles.
It went back in for a few bits including this to be looked at. Car is there for a week. OPC say nothing wrong with the engine, top it up and say keep an eye on it.
Done another thousand miles, my usual driving pattern, and it hasn't used a drop.
I'm very glad.. but stumped?
What was the odometer reading when you dropped the car off and then when you picked the car up?Bought a 2006 c4s from OPC. Regular as clockwork, for 3k miles, it used 1 litre per 1000 miles.
It went back in for a few bits including this to be looked at. Car is there for a week. OPC say nothing wrong with the engine, top it up and say keep an eye on it.
Done another thousand miles, my usual driving pattern, and it hasn't used a drop.
I'm very glad.. but stumped?
More than once I've been at a Porsche dealer and encountered a customer complaining about heavy oil consumption or a car running (mildly) poor. Almost invariably the advice is to drive the car harder. In a few cases the dealer (GM, SM) has offered to drive the car for a week. The customer gets the message.
Rockster said:
What was the odometer reading when you dropped the car off and then when you picked the car up?
More than once I've been at a Porsche dealer and encountered a customer complaining about heavy oil consumption or a car running (mildly) poor. Almost invariably the advice is to drive the car harder. In a few cases the dealer (GM, SM) has offered to drive the car for a week. The customer gets the message.
I can't say I noticed tbh - though I really don't think it's me not driving it hard enough. I didn't buy a porsche to potter around in!More than once I've been at a Porsche dealer and encountered a customer complaining about heavy oil consumption or a car running (mildly) poor. Almost invariably the advice is to drive the car harder. In a few cases the dealer (GM, SM) has offered to drive the car for a week. The customer gets the message.
Dan911 said:
Can this be done? I thought 0-40 was what Porsche say to use?
Yes. There are a number of approved 5w-40 oils and even one approved 5w-50 oil (not a typo for 15w-50!).It is unlikely switching from say 0w-40 to 5w-40 or even 5w-50 oil will help oil consumption but you are free to give one a try of course.
I run 0w-40 in my high mileage Boxster (265K miles and counting) and my medium mileage Turbo (106K miles and counting) and do not notice any increase (or decrease) in oil consumption compared to when I used to run 5w-50. Absent noting the viscosity on the spare bottle I carry in the trunk of each car I can't tell which oil is in the either engine.
Generally what accounts for "heavy" oil consumption is the owner drives the car and it never gets really hot, the engine that is. Oil is being consumed but is replaced by unburned gasoline and water build up.
Then the owner drives the car on a warm or hot day and drives the car enough -- a longish road trip -- that this finally gets the engine good and warm and for long enough that unburned fuel and water boil away. Of course the oil level drops rather suddenly and the owner extrapolates this apparently extraordinary oil consumption into an oil consumption problem.
Given all engines use oil my take is if one is not seeing at least a bar or two drop in the oil level between oil changes he's not getting the oil hot enough to boil the water/unburned gasoline from the oil.
richardrsc said:
Just a bit gutted they didn't manage to get the annoying buzz from somewhere on the dashboard, beginning to think I may have to live with that one!
stupid question but what sort of buzz is it? electrical or just a noise. Can you describe it?I had a strange noise that I thought was a buzz behind the dash on my 996 C4 and I thought the dash was coming for it to be sorted out but my indy pulled the windscreen seal out from around the window and it disappeared.
I was told the screens can be fitted incorrectly and this can happen on 911's.
Coincidentally , I was having a new screen fitted the following week by Paul at Glasstec who confirmed this does sound like a dashboard noise and it was cured when the screen went in.
I may be a bit "off piste" but you never know?
Dan911 said:
KPE said:
Used a thicker oil like 5w-40 opposed to 0w-40?
Can this be done? I thought 0-40 was what Porsche say to use?If you have puddles on your drive it may help, if not, it won't.
Also have a look in your handbook, Porsche will likely give you an SAE graph and an API spec, not a specific number.
Globs said:
No it can't be done, for the simple reason that at 100C 0w40, 5w40, 10w40, 20w40, 30w40 and Sae40 are exactly the same thickness.
If you have puddles on your drive it may help, if not, it won't.
Also have a look in your handbook, Porsche will likely give you an SAE graph and an API spec, not a specific number.
Wrong way round, the smaller number relates to the weight when warm. So yes it can be doneIf you have puddles on your drive it may help, if not, it won't.
Also have a look in your handbook, Porsche will likely give you an SAE graph and an API spec, not a specific number.
On my RS - the use of oil on start up was epic, even for a 911 GT3. The car would create embarrassing clouds of smoke on start up. I took it to my local stealer for a check and they changed the oil and said it was fine, no abnormal smoke.
And when I got it back there wasn't any. And it was that way for six months, and yet the previous year it was awful. I am sure they put in thicker oil.
And when I got it back there wasn't any. And it was that way for six months, and yet the previous year it was awful. I am sure they put in thicker oil.
Globs said:
No it can't be done, for the simple reason that at 100C 0w40, 5w40, 10w40, 20w40, 30w40 and Sae40 are exactly the same thickness.
If you have puddles on your drive it may help, if not, it won't.
Also have a look in your handbook, Porsche will likely give you an SAE graph and an API spec, not a specific number.
Globs is absolutely rightIf you have puddles on your drive it may help, if not, it won't.
Also have a look in your handbook, Porsche will likely give you an SAE graph and an API spec, not a specific number.
911944 said:
Wrong way round, the smaller number relates to the weight when warm. So yes it can be done
911944 - Unfortunately, you couldn't be more wrong. If anyone acts on your statement, they could end-up with a damaged engine, as could you.You might want to read this:
http://www.kewengineering.co.uk/Auto_oils/oil_visc...
Globs said:
..... for the simple reason that at 100C 0w40, 5w40, 10w40, 20w40, 30w40 and Sae40 are exactly the same thickness.
........
I understand what you are saying, and I'm not trying to be confrontational, but that isn't strictly true. The "40" covers a range of viscosities. To get a true comparison, you have to compare the viscosities on a particular scale (CentiStokes is the most widely used) at 100°C. For example, Castrol Edge Sport 5W-40 has a kinematic viscosity of 12.8 cSt at 100°C, Whereas Silkolene ProS 5W-40 is 14.9 cSt.........
911944 said:
Globs said:
No it can't be done, for the simple reason that at 100C 0w40, 5w40, 10w40, 20w40, 30w40 and Sae40 are exactly the same thickness.
If you have puddles on your drive it may help, if not, it won't.
Also have a look in your handbook, Porsche will likely give you an SAE graph and an API spec, not a specific number.
Wrong way round, the smaller number relates to the weight when warm. So yes it can be doneIf you have puddles on your drive it may help, if not, it won't.
Also have a look in your handbook, Porsche will likely give you an SAE graph and an API spec, not a specific number.
jsmjsm said:
stupid question but what sort of buzz is it? electrical or just a noise. Can you describe it?
I had a strange noise that I thought was a buzz behind the dash on my 996 C4 and I thought the dash was coming for it to be sorted out but my indy pulled the windscreen seal out from around the window and it disappeared.
Thanks I finally nailed it with the help of a friend a couple of days ago - it turned out to be coming from the passenger side of the sunroof - so I was a bit off the mark!. A liberal application of felt tape under the little plastic flappy bit sorted it. Now it's about as quiet as a 911 gets I think I had a strange noise that I thought was a buzz behind the dash on my 996 C4 and I thought the dash was coming for it to be sorted out but my indy pulled the windscreen seal out from around the window and it disappeared.
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