Interesting…I grew up working on cars but hybrid tech is new to me. I’m going to look into this - I so appreciate the thought.

 

Just to clarify, my LS500 was not hybrid. But, I've had 4 Toyo-Lex hybrids going back since April 2008 so I'm very used to weird noises when I don't expect them, gas engine shutting off or turning on when unexpected, etc. Your experience of RPMs really doesn't surprise me and I don't even pay too much attention anymore to RPMs, etc. on a daily basis because everything is "normal" to me LOL.

My gut feeling is what you are experiencing is by design and nothing to be concerned about.

 

Yeah, I am starting to agree that this may be by design - largely due to the help of folks like you here. Thank you!
I had a Honda hybrid for a short period of time before this car and I don't recall such an issue but Toyota/Lexus is likely different technology.
As I have been paying close attention, I am noticing that the issue seems to only appear more when the battery is fully charged - I'll continue to test this.
I just want to be able to give Lexus every detail when I explain this - I used to being able to offer a potential diagnose to a tech but this hybrid stuff is such a different animal.

 

Hmmmmm, this has real promise as a cause/solution. So, again with hybrid being so foreign to me, the theory is that the MG1 is going to spin all/most of the time however if the battery is full, it has to burn that energy off - as spinning the ICE? I am noticing, but will continue to monitor, that the RPM bump seems to occur when the battery is at capacity - it most often when I get onto slower roads after having cruised at highway speed for 30-40 minutes. Make sense?

 

i wouldn't worry about anything. unless there's lights, i doubt there's an issue. hybrids just drive a bit different and people overthink.

all of this is moot without a video.

 

This is the case only if you see 8 bars on the battery monitor.