Originally Posted By: oil_film_movies
So reprogramming will the ECM will change the MPG and emissions, already certified before. Anybody know how the EPA grants
re-certification for engine mapping changes like that which affect emissions and original MPG tests?
Also, first I've seen where a normal
synth-blend dexos1 oil isn't good enough here; They are calling for fully synthetic here expecting that helps reduce LSPI. Interesting.
They did all that durability testing in prototypes and engine development, and now this is discovered. Maybe only specific brands of engine oils are causing this, as LSPI research seems to point to particular additive compounds to blame for LSPI, and some oils may have more of the culprit additives. Of course, on the inside at GM, they must have asked what motor oil was being used, out of the many dexos1 oils out there.
Have TSBs like this been generated for any of the other DI+turbo engines made by other manufacturers? VW, Ecoboost, BMW, etc.?
Some 2014-5 Forester XTs as well as some 2015 WRXs were recalled for LSPI, my vehicle was involved. I know that some early Veloster turbos were suffering from severe LSPI damage and believe there was a recall involved there, too.
Good short article from Infineum on this topic...
http://www.infineuminsight.com/insight/nov-2016/quenching-low-speed-pre-ignition
I have been freaked out about LSPI since I first heard about it on this site and the recall involving my car only made that worse. I have used M1 5W30 vanilla/EP/ESP for some time since they consistently show low calcium in UOAs and VOAs, T6 5W40 is also low calcium but there are other things about it that make it less attractive to me. Seems like many Castrol synthetic formulations were showing low calcium in analyses around 2013-4 but there has been some evidence that at least some of those formulations have been changed to have MORE calcium since then, here is a thread on BITOG about Edge 5W20.
https://bobistheoilguy.com/forums/ubbthreads.php/topics/4294324/Re:_'10_Genesis_Coupe_V6_Edge_#Post4294324
This is probably just semantics, but I'd argue that these engines are blowing themselves up rather than melting themselves...