After buying my wife’s 2008 Pontiac Solstice 2.0 T with the automatic transmission and only 32,000 miles I’ve done a lot of reading on this problem with the early, and to some extent the current DI engines and not just GM engines. Recommendation’s of different oils, to certain brands and octane ratings of gas to driving styles, to walnut shell blasting the intake valves to lessen or prevent LSPI have my head spinning. I’ve already changed the oil to Mobil1 5w30 EP, with a Castrol synthetic oil filter cartridge, but I’m wondering if I should drain a qt of the Mobil1 and add a qt of HPL engine cleaner for the first OCI. We foresee only driving it maybe 2,000 miles a year so if I do use the HPL cleaner I don’t know if it would do it’s job in that short of an OCI. So far in 500 miles no codes or hiccups of any kind and drives and handles great but the BITOG OCD seems to be creeping in.
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