RX - 3rd Gen (2010-2015) Discussion topics related to the 2010 - 2015 RX350 and RX450H models

2010 requires synthetic oil

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Old 06-29-16, 08:48 AM
  #91  
NateJG
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Default GF-5 (replacing GF-4) took effect in 2010

http://www.ilsac.com/ilsac-motor-oil-specifications/

http://www.motor.com/newsletters/201...lStandard.html

Last edited by NateJG; 07-05-16 at 03:03 PM.
Old 06-29-16, 09:16 PM
  #92  
raylor4
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Originally Posted by E12ic46
Lexus only did wheel rotation at my 5k. I thought they were gonna change the oil but they said 10k.
That is correct. They like to see it every 5K.
Ray A.
Old 07-05-16, 02:34 PM
  #93  
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Default ILSAC GF-5 FAQ's

http://haukedal.ca/downloads/ILSAC_G...ESTIONS_EN.pdf
Old 10-29-16, 02:59 PM
  #94  
Rengucha
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Default Synthetic or not

If u are in colder climate 5w20 is good enough

More important is Changing the oil filter every 5K miles. Might as well put cheaper oil every 5k miles

No one can control air quality. It is same whether u put synthetic or not. Filter will become dirty no matter what
Old 10-29-16, 03:00 PM
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Rengucha
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I meant air quality
Old 10-31-16, 10:07 AM
  #96  
lexus114
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Originally Posted by Rengucha
If u are in colder climate 5w20 is good enough

More important is Changing the oil filter every 5K miles. Might as well put cheaper oil every 5k miles

No one can control air quality. It is same whether u put synthetic or not. Filter will become dirty no matter what
i asked lexus corporate about using 5w20 conventional oil and changing every 5k. they said they want the 0w20 for cold starts?

Last edited by lexus114; 10-31-16 at 12:19 PM.
Old 10-31-16, 10:33 AM
  #97  
Clutchless
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0 weight flows much faster at colder temperatures than 5 weight. That faster flow reduces engine wear at start up, which is when most wear occurs, especially in colder weather. Thus you get to full oil pressure faster and critical components are lubricated more quickly. Increases mileage too, which is the main reason they want it.
Old 10-31-16, 11:06 AM
  #98  
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Yeah... you only have the viscosity of the 0 weight for a few minutes at the most. As the oil continues to warm up, it continually migrates towards the viscosity of a 20 weight oil.
Old 10-31-16, 12:17 PM
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lexus114
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Originally Posted by Clutchless
0 weight flows much faster at colder temperatures than 5 weight. That faster flow reduces engine wear at start up, which is when most wear occurs, especially in colder weather. Thus you get to full oil pressure faster and critical components are lubricated more quickly. Increases mileage too, which is the main reason they want it.
well looking at the product information of valvoline 5W20 conventional oil. looks like it would flow just fine to me? i`m thinking the 0W20 is mostly for cafe standards. i dont see a problem with using conventional oil for 5k. there is no way i will use any oil for 10,000 miles. i just dont buy it. i do too many short trips in the winter for that.

Last edited by lexus114; 10-31-16 at 12:22 PM.
Old 11-03-16, 07:14 PM
  #100  
riredale
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Pure synthetics can go way beyond 10k miles and have been able to do so for many years now.

At the other extreme is my buddy Patrick. Back many years ago when we were just beginning to drive, his folks got him a beautiful blue Fiat roadster (forget the model, but boy, was that one sweet car). But Patrick had a particular quirk--he didn't believe in changing oil. Ever.

About 3 years go by and his engine is trashed. Rings, bearings, lifters. Can't imagine what the oil looked like in the bottom of the sump; perhaps closer to roofing tar.
Old 11-04-16, 07:04 AM
  #101  
lexus114
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Originally Posted by riredale
Pure synthetics can go way beyond 10k miles and have been able to do so for many years now.

At the other extreme is my buddy Patrick. Back many years ago when we were just beginning to drive, his folks got him a beautiful blue Fiat roadster (forget the model, but boy, was that one sweet car). But Patrick had a particular quirk--he didn't believe in changing oil. Ever.

About 3 years go by and his engine is trashed. Rings, bearings, lifters. Can't imagine what the oil looked like in the bottom of the sump; perhaps closer to roofing tar.
im sure he should have noticed diminished engine performance way before it died. especially on a four cylinder. im surprised his father wasn't on him about maintenance. unless of course he was like my dad back then. he didn't do any maintenance on his cars either...
Old 11-05-16, 07:38 PM
  #102  
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Practice compassion with everyone you meet! F250

I like that advice.
Ray A.
Old 11-06-16, 04:20 PM
  #103  
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It's really more of a reminder to me than to anyone else.

As for the oils, the "thinner" (lighter) weights are going to flow more easily which can potentially mean less residence time in hot spots and potentially more cooling effect on those hot spots. At the same time, though, it provides a physically thinner film of lubrication between friction components, and that can result in increased wear if the driver hammers the throttle on a regular basis because of the surges of forces within the engine that can overcome an overly thin lubricant film layer.

How you drive (push or baby the engine for two extreme examples) is just as important as which oil you use and how often you change that oil, and they all go hand in hand as different components of the wear and efficiency performance.
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