Greg Good Cylinder Heads
Enthusiast
If he is right, then I'm willing to take the time to read the documentation showing proof of all that has been discussed. (engne wear, longivity, performance, protection etc.) And yes the warranty is an important issue for newer Viper owners as well as engine life and performance... *safe for engines and warranty is the issue. Anybody can say anything but without the documented research to prove it, the suggestions and theories don't mean beans. Show me the documented proven research on Viper engines that specifically reccomends 15/40 oil and I will be glad to review it and entertain you more.
You're *doubting* ZDDP works? Sorry, but no one will be able to help you if that's the case.
Of course, if Detroit put more effort into building better engines ZDDP poisoning of cats wouldn't be an issue, because very little oil would ever get into the combustion chamber in the first place.
Use thicker sleeves that don't distort as much.
Use harder material on the sleeves so they don't wear as quickly.
Hone the block with torque plates.
Use honed bronze valve guides that will last.
Those four things right there would reduce oil consumption, and the amount of oil that gets into the exhaust. Then you can run a little more ZDDP in the oil and it doesn't matter.