AFAIK We have not seen any issues with oil cooling, nor with fuel filters. The biggest issue seems to be valve coking from oil blowby, condensation causing hydro lock, and detonation. Detonation is not common, but is failry catastrophic for these engines. Timing chains seem to be stretching, the trend seems to be longer (oem suggested) OCI's using semi synthetic oils can exacerbate it. All and all the better you maintain the vehicle the better it will treat you. I may be forgetting somethings, or may be a bit off, but there are several here who are quite a bit more knowledgeable than I.