Devh

If we are talking about severe duty then all of those are taken into consideration with the 10k oil change and I believe on some of the UOA from the Toyota oil that it could push 10k.
My Honda calls for 10k oil changes and I have done so since it was new and now I have over 120k on her and she is still going strong. With my Spyder I have tested the oil and found that it can go much longer then what I was changing it at so I extended the drain longer.
With the BMW the previous owner and I did 15k oil changes recommended by the factory and I sold the car at over 90k with a strong engine that didn't burn any oil.
If you use a synthetic oil in a modern car you don't have to live by the perpetual myths of oil change intervals. If in doubt the it is better to be grounded in the scientific method with test.

If you told someone 15 years ago that you were dumping your oil at 6k miles they would think you were crazy you didn't change it a 3k miles.

Usually these arbitrary numbers have no scientific bases and it is usually brought about by the unfounded logic that if you cut the oil change interval in half you will get twice the longevity.
If Toyota called for 20k oil changes then we would be back to the original 10k feel good interval.

Lavrishevo

iTrader: (1)

Have the transmission fluid serviced. At least every 60k. Both the manufacturer and Lexus, except only in the United States, have clear service intervals. Including Canada, Mexico, Europe, Asia, etc.. This is the same for the 04 - 06 LS430. Calling it a lifetime fluid is a marketing ploy and to cut own maintenance cost. Don't neglect it especially if you plan on keeping the car for a long time.

Clean the MAF sensor every 15k - 30k miles. It is first in line to get dirty after the air filter. Have the throttle body cleaned every 60k as well.

Doublebase

I respect your opinion - and honestly I may take your advice - but it will be hard...I'm old school regarding oil changes. Even going 6k makes me cringe, but I know you're most likely right. It's more piece of mind for me, and I work in the trade, so half the time I'm not even paying for oil.

Doublebase

Agree 100%. I did mine at 72k and the fluid was black, not dark...black.

I'll be doing simple drain and fills yearly from here on out. It's only a few quarts anyway.

Devh

Trust me when I say I had exactly the same mindset as you over 15 years ago. I actually believed that frequent oil changes will extend the life of the engine but I had no evidence that was the case except that the information was passed down to me. There were also many myths about synthetic oil from mechanics and one oil manufacture decided to capitalize on the ignorance of the consumer (Royal Purple).
After I started doing extended drains, I was pushing oil from my usual 3k miles to 5k miles. I was a bit leery but nothing happened.
There is a lot of factors that have determined fluid change intervals and one of the big ones is the technology. The problem is that people are not moving with what is acceptable because of unfounded myths.
I have met people that have gone 25k miles on their synthetic oil and it wasn't because of neglect as they knew exactly what they were doing with the selection of oil, filter change interval and frequent oil analysis. There was one example that had over 350k on the motor.

Devh

I agree. The the first few miles of driving, the car should be driven normally with less load on the engine and drivetrain until everything warms up.
There were those people like myself long ago that thought it was a good idea to let a car warm up by idling for 15 minutes or more when the car is first started but it turns out it is not good idea and it also serves no benefit.

It is a good idea on a cold morning to let the car idle for a few minutes tops and then slowly start driving normally which means you do not place excessive load or race the engine.
Once the car reaches operating temps then you can do as you please. On the BMWs they set the limiter on the rpms until it get warm so you don't damage the engine. Lexus could have implemented a cut off also because my other Toyota engine will not allow me to go past 6k rpms into lift until the engine is warm enough.

Johnhw2

Thanks for these great tips about war up driving until operating temps are reached.

roadfrog

When I was running Mobil 1 full synthetic in my 7 series BMW, I went approx 15k miles between changes and each time my Blackstone oil analysis advised me that I could go at least another 2k miles. I never did, because I was content with my 15k intervals.

Devh

Forget what we do here in north America as far as oil change intervals. Extended oil change has been proven on a large scale by the Europeans.