I'm using Amsoil 10w 40 high performance Synthetic oil in my LPG car and was wondering if the Amsoil Series 3000 HDD 5w30 would also be suitable to use? I do 75%/25% highway/city driving. BTW the car runs great on Amsoil with 12 month OIC's.
Why do you want to use HDD oil in a propane fueled engine. You don't need extra cleaning with propane its far cleaner then gas let alone diesel fuel. Why not use Amsoil's CNG oil. LPG is much more closely related to CNG.