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Here are my plugs at 82k. They were pretty easy to do with The Car Care Nut’s video. There are slight variations with the RX but pretty easy to figure out.
Six plugs at 82k Surge tank
Wow those spark plugs look new. Did you notice a difference?
Wow those spark plugs look new. Did you notice a difference?
The car feels a bit more responsive and smoother than before but nothing major. Similar feeling to whenever I change my differential and transfer case oil.
This is getting confusing. Assuming 350L is posting a page from his owners manual maintenance schedule showing 60K, could you do the same showing 120K?
For what it's worth my MY2016 has this in its manual. Similar videos on the 2GR-FKS engine in the Sienna has shown the plugs to be pretty fouled up around 60k. I only use top tier fuel and generally drive long distances with minimal city driving, which is why it looked pretty good for 82k. I didn't want to wait too long and potentially get stuck plugs.
They are due at 60K miles the 72 month doesn't apply to the plugs, but to what's done to the car at the 72 months check.
Spark plugs don't age when not firing.
Somewhat related to this because it requires removal of key components, is the PCV and EGR system on this engine. There was some oily residue on the surge tank runners and also the intake manifold ports, I did notice some oily/carbon build up on the intake manifold ports; hopefully the low pressure port injection did its job of cleaning off valve stems. Vacuum lines appeared to be functional. Something to notate for people who want to drive their cars until the wheels fall off.
Honestly wouldn't have known if not for the spark plug change job. Engine runs fine and doesn't consume oil.
My 2017 RX450h from drivers.lexus.com also shows replace spark plugs at 60K/72 months:
Since the ICE in a 450h operates only part of the time (while it operates all the time in the 350), why is the required spark plug change for a 450h at the same interval as the 350?
Since the ICE in a 450h operates only part of the time (while it operates all the time in the 350), why is the required spark plug change for a 450h at the same interval as the 350?
Just speculating, but does the constant start/stop behavior of a hybrid ICE wear or foul parts like this faster? I have heard this suggested as the reasoning for keeping the oil change interval the same for both models.
Just speculating, but does the constant start/stop behavior of a hybrid ICE wear or foul parts like this faster? I have heard this suggested as the reasoning for keeping the oil change interval the same for both models.
Interesting question. My wife has a 2020 RX 350 and I have a 2021 RX 450h (bought 3 months apart). I'm trying to balance the miles driven between the two cars, so it will be an interesting experiment to see how each holds up through time. I have my concerns about the 10K mile oil change interval, but more concern for my wife's 350 than my 450h. It's not likely we'll ever reach 10K miles in a year on either vehicle. More like 8-9K miles max.
As for fouling the spark plugs due to stop/start, on startup, the ICE in the 450h appears to power the front wheels until it is warmed up (though the hybrid battery may be supplying power to the rear wheels). I suspect the Toyota/Lexus hybrid system may be more durable than the systems of other manufacturers as it is fully-integrated with the ICE. Not an either/or system common on many other hybrids (and PHEVs).
08-01-21, 09:04 PM
