Might have engine noise or rough idle.

You having symptoms even after tune?

 

No I am just wondering if It does happen will I know it or is it a silent engine killer?
The rough Idle part would be after the damage is done, I'm more concerned with at that moment.

 

I know there were some changes made to pistons and such, after either the 2016 or 2017 model years. Have we seen any confirmed instances of LSPI in the 2018's yet? and better yet, AFTER a tune?

 

Yes it seemed limited to the 16.5 and 17's at some point during the 2017 production I heard GM went with a better piston. Supposedly all the 18's have them, this remains to be seen. But I have heard of not a single confirmed 18 piston failure due to LSPI, fingers crossed as it may still be to early to tell for the 18's.
If they started selling them lets say Late Sept early Oct that's about 9 months the failures seemed to happen starting at around 17K so we are probably just getting into the time frame that we may start to see them.

 

This article has a few things you are looking for including the sounds it should make.
https://www.oronite.com/products/lspi.asp

 

I also found this
https://mobiloil.com/en/article/why-the-mobil-advantage/mobil-1-modern-engines/lspi-protection

 

AMSOIL really is your best defense against LSPI on these engines. If you're not running it now, even the OE or XL, you really ought to consider it.

Shoot me a PM if you're interested and I can get you set up. We have the following that all have exceptional protection against LSPI:

OE 5W-30, for OEM drain intervals: https://www.amsoil.com/shop/by-prod...t/motor-oil/gasoline/sae-5w-30-oe-synthetic-motor-oil/?code=OEFQT-EA&zo=5224266

XL 5W-30, for 12k mile/1 year drain intervals: https://www.amsoil.com/shop/by-prod...soline/sae-5w-30-xl-extended-life-synthetic-motor-oil/?code=XLFQT-EA&zo=5224266

Signature Series: for 15k mile severe/25k mile normal/1 year service intervals, and the best protection in hard driving and tuned conditions: https://www.amsoil.com/shop/by-prod...w-30-signature-series-100-percent-synthetic-motor-oil/?code=ASLQT-EA&zo=5224266

We also have a 15k mile filter that fits the Gen2: https://www.amsoil.com/shop/by-prod...lters-and-by-pass-systems/oil/amsoil-ea-oil-filters/?code=EA15K50-EA&zo=5224266

 

I had a '15 with the 6mt, now a '18 with the 6mt and I can tell you the '18 is geared way higher, whereas the 15 would be 2600 rpm @ 60 the 18 is like 2000 rpm @ 60. The 18 feels like it has LESS torque than the 15, which makes it easy to lug the motor where it is not happy. Exactly what you don't want to do - pre ignition. Heck, the upshift light might to go from 5-6 doesn't happen till about 60 mph. The 15 would say 45 mph. All I can say is that now on the 18, 6th gear really is an overdrive. Its like if the 15 had a 7 sp.

On a side note, one thing I did not know until I read the manual - shift away with the cruise control on! Don't know if that worked on the 15 but I never tried. And... this thing has some kind of hill assist where it will not roll backwards (for a second or 2) - no mention of this in the manual however.

jk

edit - 2K rpm on the 18 is actually closer to 65 mph, in any event about a 500 rpm difference between the 15 and 18 per gear.

 

I have had the car cough, rattle, and then have absolutely zero power for a second. I think those have been LSPI events. The handful of times it's happened, I had tried 87/89 octane and was running the dealer Dexos 1 oil.

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I'd go to 91 octain and get rid of the dealer oil. That's what I did as precautionary action.

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Valvoline new modern engine synthetic addresses the lspi issues with proven testing in the GDI turbo engines . Marketed since May .

 

Pennzoil Platinum:

https://www.pennzoil.com/en_us/education/know-your-oil/what-you-need-to-know-about-api-sn-plus.html

 

Taken from the above link...

Maintaining your vehicle’s performance means protecting turbocharged engines from Low-Speed Pre-Ignition (LSPI). Automakers are the driving force behind API SN PLUS, a new supplemental motor oil specification that protects turbocharged engines. Pennzoil products with this designation protect against LSPI."

but to what standard?

 

Taken from the above link...

Maintaining your vehicle’s performance means protecting turbocharged engines from Low-Speed Pre-Ignition (LSPI). Automakers are the driving force behind API SN PLUS, a new supplemental motor oil specification that protects turbocharged engines. Pennzoil products with this designation protect against LSPI."

bot to what standard?

To what standard? I have no idea....its Marketing, as all brands of oil with Dexos 1 rating state basically the same. One of the stated causes of LSPI is oil droplets in the combustion chamber, which BTW, fouls the intake valves. Heavier weight oil and a catch can may help offset both issues.

 

Bottom line is all of the auto makers will talk about LSPI and will talk about protecting against it but will not explain to what degree or how effectively they protect against it. To date AMSOIL is the only company to advertise complete protection in GM's test on even one test run, let alone five consecutive runs.

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That's what I'm taking about.

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The required oil can be any oil having the Dexos 1 rating.

 

My 2017 owners manual shows on page 272. “Failure to use the recommended engine oil or equivalent can result in engine damage not covered by the vehicle warranty.” IMHO any dealership that tried to void your engine warranty for using Amsoil would have to have one big set of brass balls trying to prove in court that Amsoil is not the “equivalent” of the recommended oils, but who knows stranger things have happened.

 

****​

 

Note the date from the link provided by 17Cruzer:
http://www.amsoil.lube-direct.com/2011/04/dexos-1-amsoil-has-it/

April 2011

 

That doesn't really change anything.