When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
The Motul samples in the spreadsheet in post #4 have some of the highest wear metal and lowest viscosity numbers of all the spreadsheet entries. I used to use it but switched to DT40 and get better UOA results with it than I did with the Motul. I don't care about A40 approval as my car is way outside of warranty.
they also have higher mileage cars as well as double sometimes triple the oil change interval length of the other samples. There’s a DT sample in the chart with 2,000 miles on it.
wear metals take time to accumulate. LN recommends motul.
I didn’t read the whole thread, but just went through something similar with MoS2. Charles Navarro told me it does decrease viscosity and often leads to knocking/ticking. I’m ashamed I tried Liquimoly and MoS2, albeit for only 3k miles. I should’ve done better research. I dropped my oil pan to check, thankfully no metal.
MoS2 is a solid lubricant. Its benefit is that it adheres to the surfaces of touching moving parts - important for cold starts. I doubt MoS2 reduces oil viscosity, after all Driven (and others) add Moly to its oil.
It's telling that Driven oil has Moly... LiquiMoly MoS2 can be added to any oil.
True dat. Leaning for now with the whole "balanced formulation" straight from a supplier for the time being. Have had a hard time so far finding out exactly what type of moly is in the different oils other than the MoS2 is a suspended solid lubricant where the Mobile 1 (I think) is an organic type. And both react differently with the other lube modifiers like Boron and Zinc. As it is a solid, could too much be harmful if it settles out and just sits, collecting deposits in the galleys or low spots? Maybe not likely, but possible. I also wonder if too much can poison the cats over time. Been reading a bit but just a noobs with this stuff, so If some experts out there can offer a better explanation please do, so I can have my facts in order.
Originally Posted by Petza914
I would move to a 5,000 mile interval. There are a out 10 points shared between a TAN and TBN. You want the oil to not be acidic so the TBN should be a higher number than the TAN. If your TBN number is 1.4 that means your TAN is likely somewhere around 7 or 8 making the oil much more acidic than basic. In the next sample, pay the extra $10 to have Blackstone run the TBN so you can compare the two, then adjust the mileage change interval to a place where the TBN exceeds the TAN.
Wear metals look great though.
THIS^^^ relationship I was not clear on. Long chain fatty acids rule! Great info.Thanks!
Another oil report. Why do I keep doing this? Entertainment ! Yes, purely that. I changed my oil at 4,100 miles instead of 5,000 because I headed out on a multi-thousand mile trip and wanted fresh oil.
I had added MOS2 in this fill hence the high moly content. No, I do not endorse additives, again, pure entertainment. My current fill in my car has Ceratec because I am nuts.
NOTE: Blackstone notes that their average for our cars is 3,500 ... that tells me that only the seriously neurotic do these analytics.
Peace
Bruce in Philly
Last edited by Bruce In Philly; 10-01-2020 at 10:47 AM.
Another oil report. Why do I keep doing this? Entertainment ! Yes, purely that. I changed my oil at 4,100 miles instead of 5,000 because I headed out on a multi-thousand mile trip and wanted fresh oil.
I had added MOS2 in this fill hence the high moly content. No, I do not endorse additives, again, pure entertainment. My current fill in my car has Ceratec because I am nuts.
NOTE: Blackstone notes that their average for our cars is 3,500 ... that tells me that only the seriously neurotic do these analytics.
Peace
Bruce in Philly
Bruce, that's a significantly better report from a viscosity perspective - notice how much higher it is. As I've stated frequently, there's a significant drop-off in viscosity and the additive package once you cross over the 4,000 mile change interval.
Bruce, that's a significantly better report from a viscosity perspective - notice how much higher it is. As I've stated frequently, there's a significant drop-off in viscosity and the additive package once you cross over the 4,000 mile change interval.
And here is a quote from Pete that shows why it's important to understand....
quote=Petza914]Mano, the real purpose of UOA is to catch things before they go wrong and address them. For example, in my case on my 997, my Zinc and Phosphorous numbers were reading a little low for the type of oil I was running st the change interval I was using, so something in the motor was causing the anti-wear additive package to break down a little sooner than it should. Exploration revealed a leak in the AOS plumbing that was causing a slightly lean condition (fuel trim numbers below 1.0000) which makes the engine run hotter than it should and the spark plug electrode wear and tops of the piston crowns support this finding. Also found some bore scuffing in #6 - it's so light it can't be called scoring yet.
So, I've fixed the intake leak, am going to shorten my oil change interval from 4,000 miles to 3,000, run a slightly cooler spark plug, and hopefully, prevent having to rebuild this engine for a few years yet since it only sees about 5,000 mikes/year. Not discovering any of this from the initial UOA results, I would likely have more damage inside the motor and much worse scoring.
[/quote]
Off topic but important- A leak in the aos will cause the motor to have a vacuum leak which will allow unmetered air into the motor behind the maf. This will then be burned with the fuel injected per the MAF reading which will be short on gas and be lean. LT Fuel trims would add fuel to then be over 1 to adjust to accommodate for this vac leak.
if your fuel trims are under 1 the car is rich would not be caused by a vacuum leak.
I think it’s your fabspeed intake Pete. If you measured it I bet it’s smaller than the stock maf housing.
08-14-2020, 01:13 PM
