Amsoil decisions

[Adamvabeach]

Ok ive done some researching in the previous threads and have yet to find the answers Im looking for. I have ordered Amsoil for my 2005 F350 6.0 diesel. It has 96,000 miles on it. Also got the engine flush. Im concerned about the weight. I ordered 5w30. Series 3000. I cant use the 5w40 it is only manufactured for vehicles 2007 and on. So the other choice is posted below Amsoil as well. Which should I get??

Synthetic Heavy-Duty Diesel & Marine Motor Oil SAE 15W-40 (AME)

Engineered for all types of diesel engines with an emphasis on modern, low emission heavy duty diesel engines. High 12 TBN controls acids from combustion blow-by and EGR. High levels of detergency and dispersancy additives control soot thickening, oxidation and wear. Resists bore polishing, deposit formation and ring sticking. Provides clean engine performance. Extended drain capabilities reduce downtime and motor oil expenses.[/B]

[DoubleDpsd]

pretty sure you can use 5w40. Don't see why not.

[Adamvabeach]

On the Amsoil website its states this


Synthetic 5W-40 Premium Diesel Oil


The premium choice diesel oil for model-year 2007 and newer heavy-duty and pickup truck diesel engines requiring API CJ-4 emission-quality oil standards. Delivers extraordinary lubrication in diesel engines in commercial, fleet and personal applications. Exceeds modern specs for emission-quality diesel oil.

[Dan"gerous"]

5w-40 is backwards compatable.......They are simply informing that it is OK to use in the newer engines.

[Adamvabeach]

Id much rather use this it will lower the price significantly, what about the 15w40 marine oil?

[Adamvabeach]

What do you mean backwards?

[Dan"gerous"]

On amsoil site click on more info under 5w40 and you'll find this:
APPLICATIONS
AMSOIL Synthetic 5W-40 Premium Diesel Oil replaces 5W-40, 10W-40 and 15W-40 viscosity oils. It is “backwards compatible” with pre-2007 diesel engines and recommended for newer and older diesel and gasoline engines and other applications requiring the following worldwide specifications:

[Dan"gerous"]

Originally Posted by Adamvabeach

What do you mean backwards?

It means it will work in pre-07 engines

[Adamvabeach]

Thanks a million

It meens that its the only oil you can use in 2007 and newer but you can use this or the old oil in 2006 or older. Also marine oil is designed to be used at different temps, conditions and durations and can lead to problems if used in a non marine application.