10sw30 for 2013 gs350 ??
#2
Racer
Why would you deviate from the oil recommended by the manufacturer?
0w20 synthetic is recommended for this and many other modern engines.
10w30 is thicker at all temperatures and will not flow as designed through the engine. You should not do that.
0w20 has been recommended for many engines from many manufacturers for more than ten years.
There is no evidence that it has affected engine wear in any way: cars are still exceeding 250k miles without issue.
Polymer additives have changed how oil lubricates; viscosity and lubrication are not related the same as they were in the past, and that continues to evolve.
Oil 'thinness' is not a measure of its ability to lubricate, only of its viscosity.
0w20 synthetic is recommended for this and many other modern engines.
10w30 is thicker at all temperatures and will not flow as designed through the engine. You should not do that.
0w20 has been recommended for many engines from many manufacturers for more than ten years.
There is no evidence that it has affected engine wear in any way: cars are still exceeding 250k miles without issue.
Polymer additives have changed how oil lubricates; viscosity and lubrication are not related the same as they were in the past, and that continues to evolve.
Oil 'thinness' is not a measure of its ability to lubricate, only of its viscosity.
Last edited by jonathancl; 02-15-18 at 09:05 AM.
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Superman60 (02-15-18)
#3
I would go with what is recommended but they are going to "to thin" oil imo due to gas mileage. Yes, the weight of oil makes a difference.
but use full synthetic and your gtg
but use full synthetic and your gtg
#5
Instructor
This, like all modern engines, is designed and built to close tolerances to support using such a thin oil. Older engines were built with high tolerances and the oil had to be thicker to protect the bearings.
The only way I'd go UP in oil weight would be if I was in an extremely hot environment, such a desert or tropical climate that never sees freezing temps. Your mileage will decrease with a thicker oil. I would not try anything thicker than a 5W20 or possibly mix in a single quart of 10W30 into the rest of 0W20 for a mixture of 2W22. Too much of a change all at once might damage seals and other unknown things.
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#7
Instructor
In cold climate like Alberta, the most wear happens during the first few seconds of starting the car when the oil is settled and thick. Putting in anything higher will cause even more wear during those crucial seconds.
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#8
Lexus Fanatic
Why would you want a heavier weight oil on startup? Just as a little extra to prevent leaks? Not worth it. If you want to use a heavier weight oil I would go with OW 30 as it has better engine protection when the engine is hot and the same protection as OW 20 when the engine is cold/startup.
#9
Pole Position
this kind of reasoning doesnt make sense because they spec thinner oils to increase mpg’s and meet emissions standards. They do not spec oils for maximum protection and in their terms the life of a car is only 150k miles. They also say the transmission fluid doesnt need to be changed 🙄 i hope no one is following that recommendation either.
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User 122922 (09-20-21)
#10
Pole Position
this kind of reasoning doesnt make sense because they spec thinner oils to increase mpg’s and meet emissions standards. They do not spec oils for maximum protection and in their terms the life of a car is only 150k miles. They also say the transmission fluid doesnt need to be changed �� i hope no one is following that recommendation either.
Last edited by Superman60; 02-17-18 at 05:54 AM.
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#11
Instructor
this kind of reasoning doesnt make sense because they spec thinner oils to increase mpg’s and meet emissions standards. They do not spec oils for maximum protection and in their terms the life of a car is only 150k miles. They also say the transmission fluid doesnt need to be changed 🙄 i hope no one is following that recommendation either.
I've built motors that required 20W50 due to the clearances and the expected RPM/load the motor was going to be subjected to in its life. The crank clearances were set at 0.0025 on the mains and 0.003 on the rods because it was going to be slinging 110mm pistons 99mm up and down at 6500 RPM.
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#12
Pole Position
The things people do to chintz on something as cheap as oil to a Lexus is nuts. Just go to Wal Mart and by the correct Mobil 1 and be done with it if your changing it yourself.
#13
Pole Position
i dont understand where you got the idea it was about saving money. The OP stated he wanted to use 10w30 synthetic oil, is that cheaper than 0w20 synthetic?I doubt it. I think they are more worried about protecting the engine properly as 0w20 is basically water and in hot climates im not sure how well it protects either.
#14
this kind of reasoning doesnt make sense because they spec thinner oils to increase mpg’s and meet emissions standards. They do not spec oils for maximum protection and in their terms the life of a car is only 150k miles. They also say the transmission fluid doesnt need to be changed i hope no one is following that recommendation either.
As far as the trans fluid goes you are right about that, but frankly that's a way different ballgame from the motor....
-Mike
#15
Pole Position
Not sure if serious, I guess all the people putting 200K+ on toyota V6/V8s just by using the factory recommended oil weight, are all just full of BS..... lol. the motors running just fine are just figments of our collective imagination.
As far as the trans fluid goes you are right about that, but frankly that's a way different ballgame from the motor....
-Mike
As far as the trans fluid goes you are right about that, but frankly that's a way different ballgame from the motor....
-Mike