What oil

[badluckb]

What oil should I be running?7.3 100000 miles. I spend alot of time in the snow during the winter. I also do alot of towing in the summer 100 degree weather.

[TxEx]

amsoil 15 40 imho

[7.3Lariat]

I personally like the Rotella T6 5w40. Seems to do me well in the winter here.

[jays big blue]

I agree..T6 5w-40 is good in the cold. Just recently started using it and makes a noticable difference on start up...below 20 degrees.

[floorboy]

T6 5w-40 here

[jesilvas]

What are your winter temps?
15w40 is standard, but isn't good for cold temps around 20-30.
5w40 is good for much lower temps but still provides summer temp protection

I made my Samsung SGH-I997 send this.

[hucorey]

For me the rotella T6 didn't hold up very long. For a full synthetic I feel you should get 10k miles. Started to get noisy around 5k miles. I just recently put in Amsoil 5W30HD. Quicker starts, quieter, and a little more throttle response. But, that's just how my truck runs.

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[jesilvas]

I don't see why you think it should go further with such shearing by the HPOP

[hucorey]

Better quality oil will shear less. By what your saying you can use any oil and it makes no difference. It all shears the same??? The additive packages companies put in their oil are there to help reduce that. Granted, our heui powerstrokes are definitely going to reduce the life compared to non heui systems.

[blue99stroker]

i just bought 5w-40 delo 400 synthetic at walmart for under 20 bucks a gallon.
trucks starts great in the cold and runs smoother when its cold.
and its full synthetic.