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My car came with the bog standard Mobil 1 0W-40. I sent it in to Blackstone when I did an oil change, but switched to LiquiMoly 5W-40. Reading through the threads here, I may just switch to Driven DT-40 - if I do, is there any point in sending the old LiquiMoly I drain out for analysis? Seems not helpful to use a different oil.
How many miles ago did you switch to Liquimoly? You can add another UOA data point or add Ceratec. If you do switch to DT-40, run the BR30 for a hundred miles first.
How many miles ago did you switch to Liquimoly? You can add another UOA data point or add Ceratec. If you do switch to DT-40, run the BR30 for a hundred miles first.
Thanks. I changed to LiquiMoly my last oil change, or about 2700 miles ago.
My last UOA had similar mileage but with a longer duration. With this mileage, it's a good time to go with the DT-40 and have a data point with LiquiMoly.
Here is my latest UOA with hopefully my previous reports shown below. And here are all the protective measures I've been taking to try and ward off some streaked cylinders from advancing further. Feedback on my measures taken and on the analysis are welcome!
Based on Petza's previous advice for my scenario, I am running Driven FR50 oil.
I also have the L&N LTT installed and the spin-on oil filter adapter to run the Napa 1042 filters.
I am trying to keep my OCI to no more than 3k miles or 1 year. This particular change was 2500 miles and 8 months.
I fill up with Shell 93 V-Power NiTRO pretty much all the time. Occasionally I add Driven Injector Defender into the empty tank at fill-up.
Finally, I have been logging oil consumption for some time now, looking for any change in the consumption rate. If anything, it has gone down slightly in the last several months - at my last addition it was averaging over 1300 miles per 1L. I realize people's healthy and unhealthy engines consume oil at vastly different rates so I'm not really looking into the number itself, just any increase in consumption rate.
Originally Posted by onnastick
This is only my second UOA. I decided to try out SPEEDiagnostix, so since there's no history I'm cross-posting my first UOA. The consumption is pretty low I think (I was nearing having to add my first quart at 1200+ miles). The numbers look pretty good to me, but then again I'm not putting on a ton of miles as I'm not driving as much as I imagined I'd be. Closing in on my first year of ownership of my first Porsche.
The SPEEDiagnostix analysis was on Driven DT40. The Blackstone one I don't actually know since I didn't have that oil put in. I am assuming the previous owner (or dealership) just put in the Porsche recommended Mobile 1. I am now driving it with Driven FR50.
Here is my latest UOA with hopefully my previous reports shown below. And here are all the protective measures I've been taking to try and ward off some streaked cylinders from advancing further. Feedback on my measures taken and on the analysis are welcome!
Based on Petza's previous advice for my scenario, I am running Driven FR50 oil.
I also have the L&N LTT installed and the spin-on oil filter adapter to run the Napa 1042 filters.
I am trying to keep my OCI to no more than 3k miles or 1 year. This particular change was 2500 miles and 8 months.
I fill up with Shell 93 V-Power NiTRO pretty much all the time. Occasionally I add Driven Injector Defender into the empty tank at fill-up.
Finally, I have been logging oil consumption for some time now, looking for any change in the consumption rate. If anything, it has gone down slightly in the last several months - at my last addition it was averaging over 1300 miles per 1L. I realize people's healthy and unhealthy engines consume oil at vastly different rates so I'm not really looking into the number itself, just any increase in consumption rate.
I think you're on the right track here and nothing looks too concerning cinsideringnyuunren the oil twice as long in this sample vs the previous one. We'll know more once we see the next one with the 2nd round of FR50.
July 2023 BlackStone Report - nothing to see here, right?
Was stressing for more than a few months given this was a dealership purchase, but looks like a clean report for my 997. Will plan to run this report annually.
Was stressing for more than a few months given this was a dealership purchase, but looks like a clean report for my 997. Will plan to run this report annually.
Not bad, now switch to something better like Driven DT40 or LiquiMoly MolyGen in the green jug.
Copper and Iron are a little high for only 3,000 miles and at 5k would be high single digits if not low double digits. Viscosity is low too so the viscosity modifiers are shearing down the oil to a lesser grade and why the bearing wear is a bit high (iron, copper, and lead).
Aluminum is good though, which is the scoring indicator.
Thanks - As I'm not the original owner, I know the 1 owner that did have this 997.1 only ran 0w-40. My first oil change since submitting this oil for analysis, I stuck with the 0w-40 but I think given the viscosity issue, I will switch to 5w (A40 approved) going forward. Plus, I am running MoS2 now as well. The report shows 16 for moly readings, but I'm not sure if the previous owner used that stuff or not.
Note that the 10.96 cSt measurement in your report is the viscosity @ 100 C. This is your "hot" viscosity and is effectively a 30 weight, which is not good (good for your fuel economy not good otherwise). Switching from 0W-40 to 5W-40 will do nothing to help this because 0W/5W is only the cold viscosity. Some brands like Driven DI 40 only come in a 0W-40 instead of a 5W-40, this is nothing to worry about.
Thanks - As I'm not the original owner, I know the 1 owner that did have this 997.1 only ran 0w-40. My first oil change since submitting this oil for analysis, I stuck with the 0w-40 but I think given the viscosity issue, I will switch to 5w (A40 approved) going forward.
I'm also in a warmer climate area anyway.
Honestly, don't worry about A40 approval. Two of the best oils for these engines don't have A40 because the companies didn't write the big check to Porsche to make it so. If you're in a warm climate, I would run DT40 5w40 or even FR50 5w50. In SC I run FR50 in one of my 997s and am converting the other over at the next oil change to have more film strength. You can buy the Driven oil from them directly, from Summit Racing or from LN Engineering. I have a cabinet full of the different grades for my different cars and use it in 9 cars and a wakeboat. It produces better UOA reports than anything I've compared it to and better than anything that came in these cars when I bought them.
Posted this once to my original thread about changing from Motul to Driven. But thought I would post here to get better feedback. This is my first UOA since switching to Driven 5w-50 on advice from LN and Petza. Looks good to me. Car is a 2006 C2S with 98k miles.
Weird your fuel dilution measure only says "Negative" instead of the actual % ?? That is really weird. I was wondering if Speediagnostix changed that recently but I see it that way for your 5/14/19 test too. My reports from them always have it in % to the .01 precision, not a binary measure. Knowing the actual % is better probably for obvious reasons so I don't know if that is a mistake or why they would change that..
Petza/LN gave you good advice, both very knowledgeable, your results look good for a first OCI. You can see the higher viscosity in your 16.0 cSt reading even after almost 6K miles. The wear will probably continue to slightly improve in subsequent OCIs.
Two questions if possible - why dt40 over liquimoly? I just switched to liquimoly high tech 5w40 from a mobile 0w40 about a thousand miles ago.
Second - I've seen an excel file floating around for tracking UOAs, does anyone happen to have that?
The spreadsheets are in this thread, but I don't know in which post the latest version resides.
@wjk_glynn is who started this and has been posting the updates so maybe he'll throw a new version in here for us.
From the UOA reports I've seen nothing works as well as the Driven oils in these motors (DT40 or FR50 for the 997.1s depending on climate, mileage, and mods) and DI40 for the 997.2s.
If using LM, the only good reports I've seen are from the green bottle or jug one, whichever that is. The other LM oils seem to have quite a bit more bearing wear (iron & copper) than the Driven oils do.
06-26-2023, 04:39 PM
