Originally Posted By: 1JZ_E46
Originally Posted By: Speak2Mountain
I BELIEVE I read that Mobil 1 EP and AP 0w20 are 9-10. Not bad considering their thinness.
According to some new data presented on BITOG, NOACK may not be as important % of PAO in preventing carbon deposits on intake valves.
I know the Mobil 1 EP/AP has alot on PAO in 0w20.
While we spin our wheels on the data trying to determine what is important or not, perhaps the most significant variable we can control to reduce intake valve deposits is to keep the oil CLEAN and don’t engage in long drain intervals. The oil can be be the best oil money can buy, but the deposits in suspension are still going be there and they’ll bake onto the valve.
*If PFI fuel system you can run a little OCI and address IVD with a bottle of Gum Out Regain or Techron ... With DFI fuel systems in a mix of suburban and h'way driving I will not exceed 5,000 mile OCI's in my '17 Sonata and at 3,750 miles I may start checking more closely and possibly change earlier than 5,000 miles !