Mates:
My 2017 RX was serviced at 31K miles, and I reset the maintenance light via dash board car settings. After resent it says I have 8000 miles to go before another maintenance required.
Now at 35K and the light came back on. Just 3~4K miles driven, and service again? Full Synthetic oil definitely lasts longer than that I think?

Service manual calls for 1year/10K oil change interval. So the maintenance light is there for decoration purpose, I guess?

You guys ever got confused by that?

 

Just reset it again and if it comes back too soon, tell your dealer.

 

How far does it go between reminder intervals in your RX?

 

10k, IIRC.

 

The oil life monitor supposedly receives a multitude of inputs (time, mileage, engine load, temperature, etc.) to calculate when it's time for a change. Unless you drive under severe conditions, just change it according to time or mileage whichever comes first. The one in my Mustang is supposed to do the same, but it comes on every 12 months regardless of mileage. Last year, I drove only 1,500 miles.

 

Are you certain the maintenance light is for the oil change interval? Assuming the '17s are like the '20s, there is a full set of maintenance items under Settings->Vehicle->Maintenance. All are customizable with target mileage and/or date. I think those will trigger the dashboard maintenance light, too. To answer your last question, yes, I have been confused by the Lexus maintenance tracking system. It appears to have been designed by an intern with no usability training.

 

I have a 2017 and the reminder is there for you, you set it and it will remind you when, you can set it by time, miles, or both it follows YOUR instructions to the letter it does not talk to the engine.

 

Mine is 2017 base with the smaller dash display. I didn't see an option in the menu for customizing which reminder though. I got to really play with it

 

Mine comes on every 5k miles. Its automatic. While oil changes are typically every 10k, there are 5k services as well which are usually smaller in nature. If you consult your maintenance schedule, you will see you have "maintenance" at 5k, 10k,15k, etc. The light is simply a reminder of that time frame. I use the vehicle maintenance menu on the NAV to setup things to remind me like cabin filter, air filter, brakes, etc. You can customize all of those based on when that service was done. If you have had service at 31k (which would be the "30k service"), you may see a reminder around 35/36k for the small maintenance in the schedule. Hope that helps.

You may find this useful - > L-MMS-17RX350.pdf (lexus.com)

 

Are all 2016+ RX models required to hold full synthetic oil?

 

I believe so with the 10K mile change interval. I change at 5 or 6K thinking the filter can't last that long even if the oil can.

 

My 2020 owner's manual specifies ILSAC GF-5 oil with a recommended viscosity of 0W-20. 0W-20 is available as a synthetic blend and full synthetic. Based on the owner's manual, I don't think full synthetic is required. Every reference I can find for Toyota Genuine Motor Oil just says "synthetic." It is not clear to me if it is a blend or not.

The GF-5 spec is over 10 years old. You didn't ask, but I run GF-6A full synthetic oil in my RX.

 

Thank you so much guys