RX - 4th Gen (2016-2022) Discussion topics related to the 2016 and up RX350 and RX450h models

4RX Mileage Thread

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Old 02-29-24, 07:26 PM
  #436  
bitkahuna
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down hill, 55-60, don't try to keep constant speed or accelerate on inclines, etc. in other words, hypermiling?

but nothing to do with ev's.
Old 02-29-24, 07:44 PM
  #437  
Gdhillon
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Originally Posted by Quantum501
I have a 2020 and mileage really depends on driving habits. On highway I get about 24 mph but in city with stop and go it drops to about 17 mpg.....sorry, I am in US so we use the goofy units. So your mileage is definitely low....about 14 mpg.

Dirty Air filter and/or MAF sensor, and old spark plugs could all also contribute. With 136k on the engine (km or miles) the plugs may be due.
ok thanks, I found a good video on YouTube for changing plugs. But having a bit of issues sourcing plugs etc, locally we only have a Toyota. Could I in theory just purchase plugs, intake manifold and throttle body gasket for a 17 highlander?

I’ve also seen guys on here recommend lexuspartsdirect.ca but shipping seems pretty high

Thanks!
Old 02-29-24, 07:46 PM
  #438  
Gdhillon
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Originally Posted by FastFord
16.5 l/100kms is a bit low for city driving...depends on how bad the stop and go, idle time, temperature, etc.
16.5 is 17 mpg (imp)
I never found eco got better gas milage, just horrible acceleration.

I get a bit better (22 RX350) in the city (14 avg) and substantially better on the highway (9.8 avg) Almost the same as my 6.2l 4x4 pick up truck!

Like Quantum501 says, check Filters, plugs, etc.
thanks for the reply

yes it does seem to shift weird/poor acceleration.

i will try off eco, it has been a bit cold here but not too crazy. I usually only idle for a few minutes

I will look into above thanks again!
Old 03-01-24, 03:06 AM
  #439  
JimInTN
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I've gotten 28.x before in wife's RX, highest I remember.
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