I don't get it with you guys.
Lexus servicing is 12 months or max 15000 kms, that is dealer servicing and it doesn't mean you don't have to do other ( none dealer) stuff yourself or if you don't like to get your hands dirty get someone else to do it .
These include but not limited to:
Check oil level on a weekly basis,
Check tyre pressures on a weekly basis:
Check engine coolant level.
Windscreen washer fluid level.
Check all lights :
I'm sure if you read your book all the above and more will be listed there .
DON'T wait to get an oil warning to check the level, what if something fails and you don't get the warning? Goddbye engine!!
Just because you have to top up the oil it doesn't mean you need to change it more often, sure do it if you want or if you lots of hard driving, very short trips etc.. and always after a track day.
The quility of oils these days is so that you can have 15 ks and 12 months service, not the case 30 years ago, some Euros specify 25 k k's service under normal conditions, I don't think I would let oil in my engine for 25 k's unless I was driving 1000 ks per week on the freeway. MR2QIK,Oil use is not unique to Toyotas, all engines will and should use some oil, it's normal, some will use more than others, a lot depends on how hard you drive them too.