[Mrhavasu]

I have switched to the M1 0/40 over the 10/30. Reason is the additives are being reduced again to save the cats. The 0/40 has a much higher additive package, zinc and such. Also noticed M1 claims the oil is not a 0wt, but will perform like one. Sounds good to me, any thoughts? Not looking for a brand war, just opions on the 0/40 vs 10/30. I noticed that mercedes , and others come factory fill with 0/40 M1 or 5/40 which I cannot find. Thanks

 

[idiotsaray]

I ran 0/40 this winter in nd where temps got as low as -30 and it started every day. I went with it thinking it might be a little lighter for the winter cold starts.

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[NorCal 4x4]

I've run it a few times, but it's usually out of stock and I can never find it in the 5 qt. jugs.
Here's a link to a long thread on the stuff ... or at least on how it used to be formulated, if it has changed. http://www.titantalk.com/forums/tit...1-titan-loves-mobil-1-0w-40-a.html#post149765

 

[bottlerocket]

I run it in my Titan and my snowmobile. I have also used Mobil 1 0W-30 with great results.

 

[desertruner09]

I've ran a 0W-40 once and it quieted down the engine quite a bit, especially when towing up hill in warm weather. I'm now feeding the Titan a steady diet of 5w-40.

Only negative than I can see is cold oil pressure. After a cold start (SoCal cold), my oil pressure gauge hits the 3/4 mark at only about 2000 rpm so I need to take it easy until it gets to operating temp. Gas mileage seems to be the same as when using a 5w-30, at least for me.