Better oil for 997.2s - Driven DI40 / Ceratec - etc
06-03-2019, 09:43 AM
#16
Rennlist Member
Charles and Kevin - This is an excellent debate and there is a lot to learn.
Kevin - I read your entire thread and will adopt your process and methodology 100%.
Charles the LSPI sounds like a much nearer fire than long term wear.
Why did they leave the calcium levels relatively high in DI40 and not go as low as XP9 ? What are the risks of using XP9 or partially blending XP9 with DI40 ?
One thing is for sure - no more heavy accelerations for me after long idles.
Hoping somewhere in the middle there is a best solution. Thanks guys !
Kevin - I read your entire thread and will adopt your process and methodology 100%.
Charles the LSPI sounds like a much nearer fire than long term wear.
Why did they leave the calcium levels relatively high in DI40 and not go as low as XP9 ? What are the risks of using XP9 or partially blending XP9 with DI40 ?
One thing is for sure - no more heavy accelerations for me after long idles.
Hoping somewhere in the middle there is a best solution. Thanks guys !
The lower levels of Ca in DI40 are supplemented with other detergents to achieve the required drain intervals for a street oil.
I've attached the product data sheets requested for DI40, DT40, and DT50.
Here are some additional specs for DI40:
Kv100= 13.98 Kv40= 81.18 VI= 178 HTHS=4.2 Calcium, Wt.% 0.128 Moly, Wt.% 0.032 Phos, Wt.% 0.095 Zinc, Wt.% 0.107
All DI oils meet ACEA C2/C3 specifications for sulfated ash with an average 0.72 (mass %) and have similar formulations (just differing viscosities).
Last edited by Charles Navarro; 06-04-2019 at 12:31 PM. Reason: Added specifications for DI40.
06-03-2019, 09:45 AM
#17
Rennlist Member
Like most old men - I have to sleep but here's my understanding after a little research.
What is HTHS value and why does it matter..
High Temp High Shear - The optimum HTHS rating maximizes engine efficiency against engine wear.
Why does the VI matter and why does it tell us about the makeup base stock of a oil.
VI is Viscosity Index - the difference between the oils' centistokes value at 40 and 100 Celsius. The higher the value the more consistent the oil is as temps go higher. Better stated as the oils' viscosity resistance to temperature. VI also indicates hydrocarbon content.
So taking a stab at one question - why not use Driven XP9 in a DD car ?
Probably because it has low numbers that result in higher performance but premature wear. More frequent engine rebuilds.
What is HTHS value and why does it matter..
High Temp High Shear - The optimum HTHS rating maximizes engine efficiency against engine wear.
Why does the VI matter and why does it tell us about the makeup base stock of a oil.
VI is Viscosity Index - the difference between the oils' centistokes value at 40 and 100 Celsius. The higher the value the more consistent the oil is as temps go higher. Better stated as the oils' viscosity resistance to temperature. VI also indicates hydrocarbon content.
So taking a stab at one question - why not use Driven XP9 in a DD car ?
Probably because it has low numbers that result in higher performance but premature wear. More frequent engine rebuilds.
06-03-2019, 11:01 AM
#18
Burning Brakes
Thread Starter
Thank you Charles - It's by preference to be corrected when wrong because I am learning and I don't repeat my mistakes. I'll edit my post to note your addition for those that don't read entire threads. : )
06-03-2019, 11:08 AM
#19
Rennlist Member
You are welcome. I'm passionate about Porsches and Lubricants, the latter because of the former. I've spent almost the last 20 years researching lubrication and have most every SAE whitepaper on the subject in my library. I've been lucky as well to be involved with Lake Speed Jr. at Driven to help develop oils for our cars.
06-03-2019, 07:05 PM
#20
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Charles do you have any UOA Reports running in the Turbo 997.2TT or 991TT? I haven't seen any.. I can't find a DI40 VOA report from Blackstone or ??
06-03-2019, 07:39 PM
#21
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06-08-2019, 01:56 PM
#23
Burning Brakes
Thread Starter
I went with the DI40 and will do three oil changes and UOAs in the next 12 months regardless of mileage.
The first one is being treated as a flush and I'll change again around Independence day.
The first one is being treated as a flush and I'll change again around Independence day.
06-08-2019, 10:10 PM
#24
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I'm sitting on 24 quarts of DI40 and 12 quarts of their Flush oil.
I sure hope it's a good move, as I plan to have the car for a while.
I sure hope it's a good move, as I plan to have the car for a while.
06-09-2019, 03:48 PM
#25
Burning Brakes
Thread Starter
https://rennlist.com/forums/997-foru...for-172-a.html
06-11-2019, 06:31 PM
#26
Rennlist Member
Since switching to the Redline blend Kevin recommends, my wear numbers have been declining vs mileage for my past 3 UOA. I'll stick with the Redline blend until it flatlines or goes up....