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0W-30 Oil
So, at about 40k miles and for the subsequent 35k miles, my 2016 developed this death rattle right at 3400RPM. Many members here said it was most likely the VVT-i cam mechanism. At first it only happened occasionally (once a tankful) but then gradually became regular and predictable. It usually happened when outside temps were warm, above 75° or so. After perusing some schematics, I thought perhaps loose tolerances so for my last oil change I put in 0W-30, Mobil 1. It's been about 1800 miles since then, temps have been 90-115 degrees and I no longer have the death rattle, at all. Surprisingly (coincidence?), the crickets have disappeared too.
Just thought I'd let you know...
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