Originally Posted By: ChrisD46
Danh : I would sure hope so - I suppose the best way to check is try a SOPUS oil such as PPP or QSUD and see if you get any engine "pinging" ?
Originally Posted By: Danh
I suppose it depends on the specific engine, butI believe the LSPI risk is generally much lower in a GDI engine that is not turbocharged.
And while it looks like that calcium contributes to LSPI, engine manufacturers are aware of this and also know that calcium is abundant in most current engine oils. So it seems reasonable to assume OEMs program engine behavior to prevent LSPI even when high-calcium add packs are present and there's no reason not to use a SOPUS product (well, other than their virgin low viscosity that gets even lower with GDI fuel dilution...).
LSPI is different than the pre ignition or detonation that causes the pinging we're familiar with. LSPI is seemingly random, sudden, of very short duration, potentially very violent and can't be controlled using traditional knock sensors. LSPI doesn't create pinging: if your engine has an LSPI event you may hear or feel nothing or have something catastrophic occur. About all you can do is hope the manufacturer got it right. But again, in the absence of turbocharging it's probably nothing to lose sleep over.