LSPI

[dgjks6]

So I guess I am an amateur oil enthusiast. Until a couple weeks ago never heard of LSPI or SN plus. Don't have any new American or Japanese or Korean DI turbo engines. What I'd do have is a bunch of Germans with DI and/or turbos. So looking for oil advice. There seems to be some discussion about LSPI causing bore scoring.

So here are my situations

2009 911, DI, no turbo. Still under warranty so I need an A40 oil. Are there any SN plus A40 oils?

2016 Porsche Macan, 3L twin turbo DI. 100K miles so no warranty issues. There is a Joe Gibbs DI40 that the Porsche forums recommend for the DI 911's. But it has no certifications. Thoughts? Or just run with an A40

2008 535xi, twin turbo, DFI. 200k miles. Do I even care? There ar no LL01 oils that are SN plus. What about the driven DI40 in a BMW?

 

[SubieRubyRoo]

Castrol 0W40. But German engines generally haven't had any issues with LSPI, suppositions are that the Germans generally program their transmissions to downshift at a lower load which reduces the risk of LSPI conditions- low RPM with high load and high boost. The Castrol will do everything you need and is approved for all of your engines.

 

[dbias]

I select sport mode most times in the A4 and there is no way the transmission program allows any lugging. Regular mode allows very little lugging either so there may be something to the comment about transmission programming. I have never seen it even mentioned on most of the Audi forum I visit but most threads on those forums fret about changing the grill or exhaust lol.

 

[Virtus_Probi]

The A3/B4 oils that seem to be very popular in Europe for such engines have a lot of ZDDP, which is a potent mitigator of LSPI according to multiple studies.
LSPI is a strange phenomenon that by its very nature is not predictable...I started reading about it when I began to change my own oil and having my car recalled for it made a profound impression upon me. Seems like a lot of FXTs and WRXs had plug damage from it, but there were also some engine replacements due to that recall.
Why some DIT engines do not seem to have an issue with it is a mystery to me...euro engines are often brought up as well as the Ford Ecoboosts. You can find drivers on F150 fora who had severe engine damage and feel that it was due to LSPI, I sometimes wonder if part of it could be the maker just saying somebody had a bad piston or whatever instead of saying it was LSPI when they encounter severely damaged engines.
Staying out of high torque, low RPM conditions will definitely help a driver avoid LSPI and I'd guess most people who drive manuals are not going to be likely to "lug" like that. I do notice that when I am climbing moderate hills in my CVT-equipped vehicle that the RPMs will stay low while the boost will go up to handle the hill unless I really stand on it...I'm sure this is for mileage and it's sure not what I do if I choose to shift using the paddles (which are, unfortunately, too slow to respond for sporty driving and generally only get used in slippery winter conditions in my vehicle).

Subaru calls for SM/SN-RC and GF-4/5 oils for my car and I just use d1G2 or SN+ oils to limit the chance of LSPI occurring.
That DI40 oil does sound interesting for your high performance applications, but I know next to nothing about Driven oils. If you are an aggressive driver who ups the revs when loading the engine and use a classic high SAPS euro oil with lots of ZDDP, maybe that is good enough?

 

[RooflessVW]

Just run an A40 approved oil. Bore score is not caused by LSPI - it is an issue that has been around since the M96.

Could buy and run the same oil in all three vehicles.

 

[OVERKILL]

LSPI seems to predominantly affected forced-induction DI engines, which you don't have, so I wouldn't be concerned.

 

[Virtus_Probi]

Should that 2008 Beemer say PFI?

If so, the only engine with a possibility of LSPI concerns is the Macan.

DI/NA and PFI/turbo are not liable to exhibit LSPI.

I picked up an interesting tidbit about LSPI susceptibility from one study into the topic, the researchers actually turned the injector in the cylinder they were studying to cause it to wet the cylinder wall with fuel more than normal in order to increase the number of LSPI events. This suggests that the physical design of the cylinder and the positioning and characteristics of the injector can have significant impacts on LSPI occurrence.

 

[d00df00d]

Originally Posted by Virtus_Probi
Should that 2008 Beemer say PFI?

From MY2007 on, any BMW with "35" in its name has DI.

 

[Virtus_Probi]

Originally Posted by d00df00d
Originally Posted by Virtus_Probi
Should that 2008 Beemer say PFI?

From MY2007 on, any BMW with "35" in its name has DI.

Thanks for the clarification, I also figured out in the meantime that DFI is just Direct Fuel Injection = DI.

 

[dgjks6]

Thanks guys. The Porsche forums seem easily excitable. Back to Castrol or Mobil 1 from Walmart it is. Except when they have a special on pennzoil at the auto parts store.

 

[sloinker]

I read somewhere that lowering the calcium content and using metals like tungsten helps mitigate LSPI.

 

[dave1251]

Originally Posted by sloinker
I read somewhere that lowering the calcium content and using metals like tungsten helps mitigate LSPI.


Moly and magnesium seem to help a little also. Doing whatever possible to keep combustion chamber clean also helps.

 

[wemay]

Originally Posted by dgjks6
Thanks guys. The Porsche forums seem easily excitable. Back to Castrol or Mobil 1 from Walmart it is. Except when they have a special on pennzoil at the auto parts store.



Trust me, not just those forums

 

[PimTac]

Originally Posted by wemay
Originally Posted by dgjks6
Thanks guys. The Porsche forums seem easily excitable. Back to Castrol or Mobil 1 from Walmart it is. Except when they have a special on pennzoil at the auto parts store.



Trust me, not just those forums


ðŸ‘ðŸ»

 

[dgjks6]

Ok. Maybe liqui moly then. It's free from FCP euro.

 

[Brigadier]

Originally Posted by OVERKILL
LSPI seems to predominantly affected forced-induction DI engines, which you don't have, so I wouldn't be concerned.

 

[Virtus_Probi]

Originally Posted by wemay
Originally Posted by dgjks6
Thanks guys. The Porsche forums seem easily excitable. Back to Castrol or Mobil 1 from Walmart it is. Except when they have a special on pennzoil at the auto parts store.

Trust me, not just those forums

Ha!

 

[Triple_Se7en]

Originally Posted by OVERKILL
LSPI seems to predominantly affected forced-induction DI engines, which you don't have, so I wouldn't be concerned.


Are 2019 Hyundai and Kia 2.4's forced-induction DI engines?

 

[The_Nuke]

Originally Posted by wemay
Originally Posted by dgjks6
Thanks guys. The Porsche forums seem easily excitable. Back to Castrol or Mobil 1 from Walmart it is. Except when they have a special on pennzoil at the auto parts store.



Trust me, not just those forums


WHAT ARE Y'ALL TALKING ABOUT?!?!?!

sorry, couldn't resist

 

[Jimmy_Russells]

You have a ten year old 997.2 that's still under warranty?