M1 HM 5W30, 4.5k mi, 06 Infiniti M45

[himemsys]

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Assuming these engines use tri-metal bearings, I'd go back to whatever produced the lower lead numbers.

The other thing is, seeing that this is a Nissan V8, they like thicker oil to begin with. A lot of people have had good results with these and the VQ motors on Xw40. I owned a Titan at one time and I can confirm it got better wear numbers on 0w40. I bought my Titan new and it never consumed any oil that I noticed, so as far as the consumption goes, don't know that a thicker oil would help if the rings are worn or you're putting oil down the valve guides.

This is an older OCI. Here's the latest:

2006 Infiniti M45 - M1 HM 5W30 - 5000 mi

The lower flashpoint is due to me not properly warming the oil up before changing it. I idled it a bit then revved the engine to 2500 rpm to get the oil temp gauge up. Just didn't have time to drive it like I normally do prior to changing it. Lead is back down to universal averages, which was...

bobistheoilguy.com

Lead went down to universal averages on the same M1 HM 5W30 and I replaced it with Pennzoil Euro L (a very thick 30 grade at 11.92 cst).