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My only comment is the people at Blackstone do not understand Porsche engines. Aluminum primarily doesn't come from the pistons in this case with engines with Alusil or Lokasil bores. Piston skirts are iron coated.
Often they will say that the air filter is dirty when they see high silicon levels, which again, isn't the case with these engines. As the bores wear, you get aluminum and silicon showing up in the UOA.
Got my first UOA back. Looks good other than flashpoint.
That looks great. All the Porsche DFI engines produce fuel dilution numbers like those - the 997s and Cayennes of the same generation. As long as you don't see that increase, this is a great benchmark report that you should try and duplicate. Looks like you have a good motor there.
BucketList, you can see the effects of the Ceratec in your Moly number. That's about double of a typical UOA without additive(s). Magnesium is even a higher multiple.
Yes it's not as high as it would be if I were using Driven oil but then Ceratec has other additives that also offer protection. The numbers are great. Happy to see this especially since my car is one of those that uses a bit of oil. About a qt per 2200 miles. I use about 2 quarts between changes. All that said, my indy changed from Total to Liquimoly. So the next UOA will be for their Leichtlauf High Tech 5W-40 with Ceratec. I like that I now have the same oil as the additive and so far the car is not using a drop. Time will tell the tale though.
Last edited by BucketList; 05-11-2021 at 07:28 PM.
Reason: additional info
Actual miles was 6,353.
150 miles less than the previous test, so the TAN was up a bit while TBN dropped by a third
Mongo only pawn in game of UOA
These results are phenomenal. Even though DI40 is a 0w40, you can see from this UOA that it holds its viscosity better the M1 and retains a high flashpoint.
The fluctuation in TBN/TAN could be something as simple as differences in fuels used or changes in driving habits. Nothing to worry about. In fact, with the reduction of sulfur in fuels, TAN/TBN testing isn't an accurate indication of oil life any longer. Oxidation testing is much more accurate for oil life.
Okay, so earlier in the thread, Charles is saying to change every six months or 3k miles for a 997.2. Given COVID and winter restricting my driving of the Porsche, does this mean I should be changing the oil I just put in the car less than 1500 miles ago? I’ll happily do it if that’s what the car requires, I’m just trying to make sure that I’m not just changing it to change it, as it were.
Okay, so earlier in the thread, Charles is saying to change every six months or 3k miles for a 997.2. Given COVID and winter restricting my driving of the Porsche, does this mean I should be changing the oil I just put in the car less than 1500 miles ago? I’ll happily do it if that’s what the car requires, I’m just trying to make sure that I’m not just changing it to change it, as it were.
I would change it. I (unfortunately) had to change mine with less than 1000 miles but hit the 6 month mark. Oil is cheap...
Okay, so earlier in the thread, Charles is saying to change every six months or 3k miles for a 997.2. Given COVID and winter restricting my driving of the Porsche, does this mean I should be changing the oil I just put in the car less than 1500 miles ago? I’ll happily do it if that’s what the car requires, I’m just trying to make sure that I’m not just changing it to change it, as it were.
I'll go up to 1 year between changes, especially if the mileage is low. All my cars except (my pickup and daughters X5 BMW, which are DDs) get changed annually or 3,000-5,000 miles depending on the car.
With 6 months and only 1,500 miles, I wouldn't change it if it were my car (and why I don't) but you can do what you're comfortable with.
This is what I do with my fleet.
914 - annually - sees only a couple thousand miles per year
928s - annually - Euro sees about 5,000 - 7,500 miles per year - the Spyder only 3,000 or so)
RUF 997 - changed every 3,000 miles or annually (which works out about the same)
997.1 C2S - changed annually or every 4,000 miles (usually it's the mileage on this one that happens first, which is every 6-9 months)
Cayenne Turbo S - annually or every 5,000 miles (which works out about the same). This car is used for family vacations, so 90% of the miles are highway miles.
GMC pickup - every 5,000 miles which is every 4 months or so
BMW X5 - every 5,000 miles which is every 4 months or so
04-06-2021, 02:53 PM
