Going back to 0w-20 for the winter

[tired]

I went to 0w30 for better protection.

I see. So you decided to go back to a 20 grade for less protection?

I think the ecm is programmed for the flow characteristics of 0w20 oil and maybe this 0w30 is just throwing numbers it doesn’t like

Someone get the bingo card out. We're gonna have a bingo for sure in this thread.

 

[JForestZ34]

Most of the failures with the 3.6 were due to manufacturing defects. Millions of these engines running 0w20 without an issue

 

[ltslimjim]

I have a 2025 and it has a dual stage oil pump. Low and high. Low is for cruising and for mpg and high is for accelerating and towing I believe or high load. My issue was when I was driving on the highway at 70mph and the oil temp was at about 200 my oil psi was a steady 75. It would occasionally drop down to say 35 and stay there a couple secs but then go right back up to 75. I would get off my exit and my idle psi was 42-52. Something isn’t right because with 0w20 it never did that. I think the ecm is programmed for the flow characteristics of 0w20 oil and maybe this 0w30 is just throwing numbers it doesn’t like. So it’s constantly trying to bleed off pressure. I’ve done some research and many say the newer 3.6l are really picky with oil

I’d be shocked that the operating viscosity of 30 vs 20 to be the root cause of the aforementioned observed. You have a wide range within each grade that there are so called “thin 30” or “thick 20” oils at operating temp. The difference between them isn’t significant enough for me to believe the conclusion is accurate. I could also be wrong.

 

[GW.]

Most of the failures with the 3.6 were due to manufacturing defects. Millions of these engines running 0w20 without an issue

Absolutely. But it doesn’t mean you can’t do better with more headroom. In my case oil temps reaching 250f off roading for hours in the mountains. If I was mall crawling and wanted better fuel economy I’d be all over 0W-20.

 

[Exhaustgases]

Most of the failures with the 3.6 were due to manufacturing defects. Millions of these engines running 0w20 without an issue

Yeah how dare them not use frictionless bearings.

 

[TiGeo]

I see. So you decided to go back to a 20 grade for less protection?


Someone get the bingo card out. We're gonna have a bingo for sure in this thread.

I'm retired.