Cruiter

Reading 'twice' through the new Maintenance requirements I noticed something else that is baffling to me.

There is a requirement at 144 months or 120,000 miles for the 350 to replace spark plugs and it say's (on RX 350, use Denso FK20HR11 plugs or equivalent) pg 21. I couldn't find any mention in the book for changing plugs on the 450h.

I'm pretty sure I'll have traded up before then so it's not a real concern for me, but it's still baffling they don't mention any spark plug replacement requirement for the 450h model.

tsslaporte

Here is a place that does a UOA (Used Oil Analysis) http://www.blackstone-labs.com/ they send out a free kit then You bassiaclly fill up a small bottle when you get your oil changed. Then Mail it back and then they email and mail you a report.

You also got a PM.

on a side note-
If you use another type oil and run it for 10k and do a UOA and it shows that the oil is still good then Lexus cant bother you. But if you use a different type of oil and run it for 10k but have no proof it can run that long they will prob hassle you.

mefromfl

if i let my car go for 10k miles before doing oil change, do I need to watch the other fluids? I don't do anything by myself and usually the oil change people do my other fluids.

IS-SV

Yes, you should monitor the other fluids, but most likely nothing will need to be added within the 10K interval.

IS-SV

I was just at the Lexus dealer on Saturday with my IS350. I told my SA in service department that I planned on going to 10K intervals with the Lexus/Toyota synthetic oil. He said okay, no problem.

tsslaporte

^ what are the Factory intervals? I would not trust any one at the Service department.

IS-SV

It's all detailed in the manual(s) provided with the Lexus. Somebody might have a PDF copy for the RX

Joeb427

iTrader: (1)

10K miles with synthetic.
I'll go 7500.

tsslaporte

I was asking about your car the IS350 which you said you would be doing 10k intervals.

IS-SV

Oh. Manual says intervals are at 5K miles.

tsslaporte

If you lease the car then meh w/e, but if you own the car I would run a UOA once you did 10k to make sure everything is ok, even better and what I would do is to stop at 7500 do a UAO and see if you can go for longer.

IS-SV

Does not matter if you lease (or own) or if you use UOA or not, nobody checks this stuff upon lease return. 5-7.5K on specified conventional oil or 10K on Lexus synthetic will not be a problem for those leasing.

tsslaporte

^ if you own the car you want to make sure your oil has enough TBN and Viscosity to be protecting your engine. I agree with the leasing comment but if you own it, blindly going high mileage OCI is dumb imo.

IS-SV

I see your point, but OCI of 7.5/10K for correct conventional/synthetic oils is not high-mileage today. Going beyond would be high-mileage.