I used to think running a 10W30 would help protect a DI engine from IVD but now I’m not so sure ? There reason is no oil company is putting any research into a 10W30 oil - they just aren’t . The focus is 0W30 and 5W30 for the oil companies addressing major auto maker specifications and requirements which doesn’t include 10W30. I switched to Mobil 1 Extended Performance 5w30 and Mobil 1 ESP 0w30 long ago in my DI engine . This past week it was time for my 10K mile CRC Intake valve cleaner treatment and the result was FAR less smoke (next to zero) and “can of marbles” sounding engine after the 1 hour soak and first after treatment drive was non - existent now . The engine had a slight hesitation after accelerating for a couple of seconds and that was it . *My point is since switching to and staying with mainstream Mobil 1 Extended Performance 5w30 and Mobil 1 ESP 0w30 I no longer feel IVD are a concern in at least my DI (Hyundai) engine running 4K mile / 6 month OCI’s. I believe I would have the same experience using Pennzoil Platinum Plus or Pennzoil Ultra Platinum as well with low IVD. The 10W30 oils offered by major oil companies are no longer their best oils and running Mobil 1 Extended Performance 5w30 , Mobil 1 ESP 0w30 or even 5W30 ESP should present no IVD concerns in a DI engine with conservative OCI’s which in my opinion should be run any way in a DI engine (4K miles / 6 months).