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Topic Question - why am I having slightly increased oil consumption? |
Question - why am I having slightly increased oil consumption? Bruce In Philly (2000 S Boxster, now '09 C2S) - Thursday, 16 February, 2012, at 9:48:45 am |
Re: Question - why am I having slightly increased oil consumption? Guenter in Ontario - Thursday, 16 February, 2012, at 10:16:01 am |
One other thing Guenter in Ontario - Thursday, 16 February, 2012, at 10:20:05 am |
you will almost never see blue smoke anyway... grant - Thursday, 16 February, 2012, at 3:02:48 pm |
yep, sounds liek oil that thins out more at temp. grant - Thursday, 16 February, 2012, at 2:59:14 pm |
Re: yep, sounds liek oil that thins out more at temp. db997S - Thursday, 16 February, 2012, at 4:01:09 pm |
You might think that but my experience with my 02 is that even wtth Mobil 1 0w-40 and ... MarcW - Thursday, 16 February, 2012, at 4:29:45 pm |
There are no such hard and fast rules grant - Thursday, 16 February, 2012, at 7:21:50 pm |
According to the ACEA and SAE... I have to point out that in its approved oils list MarcW - Thursday, 16 February, 2012, at 7:55:33 pm |
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grant
First, theoretically, a 0w40 and 5w40 are both 40 weight at 100 deg C, which is operating temp. In practice, the 0w40 will likely be a bit thinner, and *may* require VIIs to achieve the range, which means it will shear down over use. But its vastly more complicated than "use 5w in older cars" and according to ACEA and SAE, dead irrelevant. Their specs say anything-w40 must meet the same viscosity specs when warm.
In fact, there are often bigger differences between brands and formulations than between the same manufacturer's 5w40 and 0w40.
In my experience, as it ages, the only prominent 0w40 (Mobil1) does begin to thin and can then burn.
But that brings us to the other part of what to do with older cars. Many older cars remain tight. I had an Audi with 300k miles that used no more oil than it did new. Of course, even new it used some oil. I have trouble believing that the poster's car suddenly became loose coincident with this oil change. It had to be something related to the change, or to a change in driving conditions. Or i should say its highly likely to be so.
Grant
i dont believe that Porsche testing invalidates ACEA specs. I think it...... grant - Sunday, 19 February, 2012, at 9:49:48 pm |
Maybe the longer trips are reducing the volume of accumulated moisture content in the oil. Laz - Thursday, 16 February, 2012, at 3:43:04 pm |
Oh, that's a good one. If you do many short trips, oil will burn, but (read on) grant - Thursday, 16 February, 2012, at 7:26:05 pm |
OK, questions answered and back from the mechanic Bruce In Philly (2000 S Boxster, now '09 C2S) - Thursday, 16 February, 2012, at 8:12:47 pm |
"top off with something heavier" Roger987 - Thursday, 16 February, 2012, at 9:21:57 pm |
Unless it's axle grease, I wouldn't worry too much about that. *NM* Laz - Thursday, 16 February, 2012, at 9:41:33 pm |
According to Porsche topping up one should use the same oil... MarcW - Friday, 17 February, 2012, at 2:34:47 pm |
True, and I don't mean for people to throw 75-90 gear oil in there either. *NM* Laz - Friday, 17 February, 2012, at 4:22:06 pm |
I am going to break this rule..... Bruce In Philly (2000 S Boxster, now '09 C2S) - Friday, 17 February, 2012, at 11:38:21 pm |
Re: I am going to break this rule..... Guenter in Ontario - Saturday, 18 February, 2012, at 11:11:04 am |
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Bruce In Philly (175K+)
I have been topping it up now with a heavier Mobil 1 instead of the already present Valvoline. I really can't see how this will hurt the car... if I did, I wouldn't do it. If anyone knows differently, let me know please. But I really can't think of why there would be a problem. I asked my mechanic about this and he said there is no issue.
So why does Porsche have this recommendation?
Re: I am going to break this rule..... Pedro (Odessa, FL) - Saturday, 18 February, 2012, at 11:28:31 am |
Thanx Pedro. *NM* Bruce In Philly (2000 S Boxster, now '09 C2S) - Saturday, 18 February, 2012, at 10:12:16 pm |
Here is what Porsche has to say on the matter... MarcW - Sunday, 19 February, 2012, at 11:22:39 am |
I suspect... grant - Wednesday, 22 February, 2012, at 12:02:38 pm |
You are mistaken. You cna mix any weights - so long as you know what you will get. grant - Wednesday, 22 February, 2012, at 10:34:34 am |
Heavier or not, how 'bout progressively topping up with the previous oil and see what happens? *NM* Laz - Thursday, 16 February, 2012, at 9:40:30 pm |
Re: Question - why am I having slightly increased oil consumption? boxsterd - Wednesday, 22 February, 2012, at 12:15:01 pm |