Still shearing down, just used up the last of my Kirkland oil. So one more report to follow with it. Will try something different next time.
07 RX400H, Kirkland 5w30, 8500 miles
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21 Si but the UA is 35? Maybe 21 isn't out of line w/this engine...hmm strange. 
Viscosity low but not terrible for the thinner 30 grades of today & 8,500 miles. But yeah either shortening the interval or...What are you planning on trying next?
Viscosity low but not terrible for the thinner 30 grades of today & 8,500 miles. But yeah either shortening the interval or...What are you planning on trying next?
It goes on sale a few times a year.
Despite their assertion that the viscosity deviation wasn’t due to fuel dilution, they really have no way of knowing that. This lab is useless for determining whether there is fuel in a sample or not.
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I wouldn't run this oil past 5k.
TBH this oil is usually very good in others cars in my family. I’ll be trying something different next change.
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Wear looks great and viscosity is BARELY out of range. This is a 10k oil in your case, easily
The last time I sampled this oil was in my 2014 Cruze 1.4L turbo at 5k miles and it still had plenty of life in it. I think 8500 miles on an oil that sells regularly for $16/5qts is a pretty solid value.
Why not? The UOA looks just fine.
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I wouldn't
It's has already sheared below it's viscosity grade. And just because the analysis looks okay on paper, doesn't mean the internals can show signs of tarnishing.
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And the engine is specd for 0w20, not 5w30, so it doesn’t matter if it’s sheared
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You're wrong! It's an 07, Spec'd for 5W-30.
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Toyota/lexus released an updated oil application chart that shows anything between 0w20-5w30 is acceptable in the rx400h. And most importantly, based on the wear levels, the engine couldn’t care less
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Yeah….im sure they released this chart for CAFE requirements on model years of the past…
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Another guy who ends his message with an emoji.Yeah….im sure they released this chart for CAFE requirements on model years of the past…
yes, it was spec'd for 5W-30 when the vehicle was made. I don't care what it was spec'd 2 decades later
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No one, including Blackstone themselves know whether there is mechanical shear of the VM or if there is fuel dilution. A Blackstone analysis cannot determine this.
What?
