IS - 2nd Gen (2006-2013) Discussion about the 2006+ model IS models

Engine Oil for IS350

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Old 06-09-12, 11:07 PM
  #31  
phillimt
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Originally Posted by aw04lfan
Mobil 1 is great, Costco have 6 qt for $26 right now.
I just took advantage of this deal! haha!
Old 06-10-12, 12:54 AM
  #32  
KillaIS250
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Damn i'm gonna have to go to Costco tomorrow!

Do you need a coupon? Last time it was that cheap only with a coupon...
Old 12-17-12, 02:40 PM
  #33  
Yogesh
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It is an overkill to use Syntheic oil. The manufacturer recomends the oil to be chaged every 5K miles and you are throwing away money if you switch to synthetic. Oil filter cannot last for 10K
Old 12-17-12, 02:46 PM
  #34  
jsmacks
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lolz..

It's only overkill if you don't value your engine. Synthetic oil is proven to be superior to conventional.

Hell.. I know it by a simple seat of the pants test. I've run both in my boat and I have to back off the gas to avoid redlining it with synthetic in there as things are just that much more slippery. It's all in how much you're willing to pay to treat your investment.


Originally Posted by Yogesh
It is an overkill to use Syntheic oil. The manufacturer recomends the oil to be chaged every 5K miles and you are throwing away money if you switch to synthetic. Oil filter cannot last for 10K
Old 12-17-12, 03:01 PM
  #35  
DKnight350
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Originally Posted by Yogesh
It is an overkill to use Syntheic oil. The manufacturer recomends the oil to be chaged every 5K miles and you are throwing away money if you switch to synthetic. Oil filter cannot last for 10K
Then why do the 250s come with synthetic from the factory?

Also, the Toyota dealerships provide written information about doing 10k oil changes with synthetic oil. If Toyota will put it in writing - I believe it.
Old 12-17-12, 03:03 PM
  #36  
2slixx
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ROYAL PURPLE ONLY! 5-30. Every 5k Miles along with Royal purple oil filter.
Old 12-17-12, 06:06 PM
  #37  
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switched from mobil 1 to Royal Purple about 15k ago, love it. can't go wrong with royal purple
Old 12-17-12, 08:25 PM
  #38  
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Originally Posted by felixt
I'm about to change my oil and saw most people using mobil 1 syn

Just wondering if anyone tried using ENEOS 5W30 Syn on their 350?
I've run eneos 5w-40 in my last 5 cars and haven't had one issue yet. In my old LS, MR2, and my now is350 I use that and oem Toyota filters. I change at every 5k miles and haven't one issue.
Old 06-25-16, 06:09 AM
  #39  
phantum29
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Sorry to bump a 4 year old thread, but I just had my 2011 IS 350 serviced and they used 0w-20. I quested them about it and they said we've been using 0w-20 in all our 350's for four years now. I mean on the online manual it still called for either 5w or 10w, and no mention of 0w for a 350. He was responding to me as if I were crazy, and it would be okay.

I bought the car 6 months ago and have already put on 15k miles, it's at 75k now and I want this car to last me a long time (milage wise). I do a lot of backroad commuting because I live out in the boonies.

Anyone know if he is right?
Old 06-25-16, 06:20 AM
  #40  
RandyIS250
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Originally Posted by phantum29
Sorry to bump a 4 year old thread, but I just had my 2011 IS 350 serviced and they used 0w-20. I quested them about it and they said we've been using 0w-20 in all our 350's for four years now. I mean on the online manual it still called for either 5w or 10w, and no mention of 0w for a 350. He was responding to me as if I were crazy, and it would be okay.

I bought the car 6 months ago and have already put on 15k miles, it's at 75k now and I want this car to last me a long time (milage wise). I do a lot of backroad commuting because I live out in the boonies.

Anyone know if he is right?
ya the Lexus Corp changed from 5-30 to 5-20, i dont know why they did that but i still using 5-30. your car should be 5-20 all the 2011 model and up
Old 06-25-16, 06:25 AM
  #41  
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Originally Posted by RandyIS250
ya the Lexus Corp changed from 5-30 to 5-20, i dont know why they did that but i still using 5-30. your car should be 5-20 all the 2011 model and up
Right, so I should have them change it out from the 0w they installed to the 5w thats factory recommended, just not what the foreman thinks is okay?
Old 06-25-16, 07:02 AM
  #42  
RandyIS250
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Originally Posted by phantum29
Right, so I should have them change it out from the 0w they installed to the 5w thats factory recommended, just not what the foreman thinks is okay?
is250 they used 0-20 winter and should use 5-30 in the summer, yours is is350 they should use 5-30 in the summer and 5-20 in the winter, i don't why they used 0-20 for your is350.

for your is350 in particular, i recommend you to stay with 5-30 because is350 engine is different to is250, use always synthetic brand from Mobile 1 . i've drove Toyota Lexus over 15 years with Mobile engine oil .

PS: During "Vietnam War" my grandpa had a Toyota Pickup Truck bus Shuttle that he rides the Vietnam South Armies back- and ford-

Last edited by RandyIS250; 06-25-16 at 07:05 AM.
Old 06-25-16, 07:43 AM
  #43  
phantum29
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Originally Posted by RandyIS250
is250 they used 0-20 winter and should use 5-30 in the summer, yours is is350 they should use 5-30 in the summer and 5-20 in the winter, i don't why they used 0-20 for your is350.

for your is350 in particular, i recommend you to stay with 5-30 because is350 engine is different to is250, use always synthetic brand from Mobile 1 . i've drove Toyota Lexus over 15 years with Mobile engine oil .

PS: During "Vietnam War" my grandpa had a Toyota Pickup Truck bus Shuttle that he rides the Vietnam South Armies back- and ford-
Thanks for the agreement! I also prefer Mobil 1 full synth, and would ideally use 5w-30 as recommended in the manual. Theses guys at the dealer are now trying to tell me that it calls for 5w-30 conventional, and if I asked for synth (which i probably did, as usual) that they would then use 0w-20. AFAIK it doesn't work like that, 5w is 5w is 5w, not 0w synth = 5w conv. I also confirmed with Lexus of America and other dealers, because these guys are resisting this, and continue to try and tell me the wrong information. "The lexus synth chart then says 0w for 350, not 5w" please correct me if I'm wrong.
Old 06-25-16, 08:17 AM
  #44  
RandyIS250
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Originally Posted by phantum29
Thanks for the agreement! I also prefer Mobil 1 full synth, and would ideally use 5w-30 as recommended in the manual. Theses guys at the dealer are now trying to tell me that it calls for 5w-30 conventional, and if I asked for synth (which i probably did, as usual) that they would then use 0w-20. AFAIK it doesn't work like that, 5w is 5w is 5w, not 0w synth = 5w conv. I also confirmed with Lexus of America and other dealers, because these guys are resisting this, and continue to try and tell me the wrong information. "The lexus synth chart then says 0w for 350, not 5w" please correct me if I'm wrong.
0w is very thin for your is350, the reason they changed from 5w to 0w because IS engine has a cam shaft knocking problem, it's piston slaps, the 0w reduce that noise, you should keep in mind that thicker oil has better protection, ill probably try 10-30w next time for my IS250 as i always used for all my TOYOTA Solara V6 Engine summer only and go back to 5-30w in the winter.

Its ok and will be fine if your car is a brand new or low mileage but if your Engine is 120k miles + man i fear that will breaks your engine time after time when you drive the car,

unless recommended by Lexus Toyota Mechanic Engineer in person or paper work signed otherwise i won't listen to unofficial info from anyone or REP in the dealership.

And don't use conventional oil lol don't listen to those guys in an independant shop even friends, my mechanic friend always tells me every Engine oil is the same well F him !
Old 06-25-16, 02:34 PM
  #45  
mike33
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Originally Posted by RandyIS250
0w is very thin for your is350, the reason they changed from 5w to 0w because IS engine has a cam shaft knocking problem, it's piston slaps, the 0w reduce that noise, you should keep in mind that thicker oil has better protection, ill probably try 10-30w next time for my IS250 as i always used for all my TOYOTA Solara V6 Engine summer only and go back to 5-30w in the winter.

Its ok and will be fine if your car is a brand new or low mileage but if your Engine is 120k miles + man i fear that will breaks your engine time after time when you drive the car,

unless recommended by Lexus Toyota Mechanic Engineer in person or paper work signed otherwise i won't listen to unofficial info from anyone or REP in the dealership.

And don't use conventional oil lol don't listen to those guys in an independant shop even friends, my mechanic friend always tells me every Engine oil is the same well F him !
Car companies have gone to thinner weight oils to help meet CAFE standards by increasing mpg ratings... What is your basis for saying that a thinner oil was used because of a cam shaft knock problem and that the pistons slap? If you are referring to the vvt actuator recall, Lexus addressed that with a newly designed part, if simply using a thinner oil would have solved that problem I'm sure Lexus would not have gone through the expense of a recall... Also, changing to 0w oil is not going to help reduce engine noise or piston slap.

To the OP, I still use the 5w30 in my 2006 is350, I do use mobile one full synthetic instead of conventional oil though... I'm sure the dealer finds it easier to just use the 0w20 when some one asks for synthetic, since the newer models use this oil, and they probably carry it in bulk. I think you will be fine using the 0w20 for this oil change, but I would go back to a 5w30 at the next interval.


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