Amsoil 5W30 Signature Series too thin for Turbo Subaru or 450 hp Ecoboost

[RDY4WAR]

Originally Posted by kschachn
Sorry, but this is a thread full of imagined problems and subsequent solutions based on more imagination.


Exactly. A few SAE studies have shown no correlation between kinematic viscosity nor dynamic viscosity above the minimum oil film thickness needed for the application. You'd be surprised how thin that is. There's also a point where wear increases with too high of viscosity due to less flow and more friction. This thread is a prime example of the "bigger is better" mentality being wrongfully applied.

 

[RDY4WAR]

Originally Posted by burla
Originally Posted by kschachn
Sorry, but this is a thread full of imagined problems and subsequent solutions based on more imagination.


Dude is asking for help assuming he is developing a strategy for his di engines. The issues with di engines are not imagined, in fact they have been solely responsible for the entire industry moving in the same direction of low CA oils. LSPI does exist, a lubrication strategy can help it. Maybe there are plenty of other factors, but as an owner you can only do so much, why not do what is in your power to do? Amsoil's formula looks like one of the better di friendly formulas out there as far as lspi protection goes, but some di's have been known to shread oil visc, it is another valid concern about starting out thin. There are many things to consider when owning a di turbo, it is advanced ownership, and it seams like even great di formulas can improve upon themselves. Haven't seen a low CA, low noack, high viscosity, high moly oil for this yet, and a lot of the paper out there suggests this would be a good oil formula for di's. let's all just run havo in a box baby and not worry ourselves?


Driven DI40 5w-40 fits that ticket with PAO base oil, 1050 ppm Zn, 950 ppm P, 1220 ppm Ca, and 340 ppm Mo.