IS - 2nd Gen (2006-2013) Discussion about the 2006+ model IS models
View Poll Results: are you running synthetic or a synthetic blend?
full synthetic
238
59.95%
synthetic blend
19
4.79%
dinosaur oil
39
9.82%
whatever the dealer fills it with
101
25.44%
Voters: 397. You may not vote on this poll

how many are running full sythetic or a synthetic blend?

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Old 09-16-07, 10:26 AM
  #91  
Joeb427
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Originally Posted by lexuspdx
Amsoil 0w-20. 25K 100% sythetic. I'll change the filter out every 5k, but not the oil for probably 20K-25K. It should be about 2 years!
I use Amsoil and would not leave oil in more than a year.
Amsoil policy also.


SERVICE LIFE
AMSOIL Synthetic 0W-20 Motor Oil is recommended for extended drain intervals in unmodified(1), mechanically sound(2) gasoline-fueled vehicles as follows:

• Normal Service(3) – Up to 25,000 miles or one year, whichever comes first.

• Severe Service(4) – Up to 15,000 miles or one year, whichever comes first.

Last edited by Joeb427; 09-16-07 at 10:41 AM.
Old 09-16-07, 11:46 PM
  #92  
lexuspdx
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[QUOTE=Joeb427;2919282]I use Amsoil and would not leave oil in more than a year.
Amsoil policy also.

Thanks, I didn't know that. I just changed over to this oil at 10K, or about 300 miles ago. I guess I'll switch it over after a year. Oh well, after I finish my case, maybe I'll switch over to the 7500 mile synthetic 5w-20 since I still have to switch the oil filter.
Old 09-24-07, 07:21 PM
  #93  
Jay.Diem
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Originally Posted by lobuxracer
Because you are throwing away perfectly good oil. Click here for supporting evidence.

This is a noob question, but when you remove only the filter, wouldn't there be this mad rush of oil coming out since nothing has been drained yet?
Old 09-25-07, 07:03 AM
  #94  
Gernby
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Originally Posted by aragorn
This is a noob question, but when you remove only the filter, wouldn't there be this mad rush of oil coming out since nothing has been drained yet?
The filter housing will drain out, but not the rest of the oil.
Old 09-25-07, 07:35 AM
  #95  
Koz
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Originally Posted by Gtidan

3) In the US, the only Group IV PAO Synthetics that are available are 1) Mobil 1, 2) Amsoil (but not the Xl-7500), 3) Royal Purple, and 4) German Castrol 0w-30 (it has the red label and says on the back, "Made in Germany). Redline is a Group V PolyEster based oil. All other Castrol, Quaker State, Pennzoil, Valvoline "synthetics" are a Group III hydrocracked oil. It is debated how much better Group IV base oils are than group III, but generally they are considered better.
From what I've read, Mobil 1 is not group IV. Sometime after Mobil filed their complaint about Castrol's claimed synthetic W/group III oil (which Castrol prevailed), Mobil 1 was re-formulated with group III. If you some documentation I would be interested to see it!

Koz
Old 09-27-07, 04:07 PM
  #96  
Shoyuu
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I was bored at work so I was reading the 2008 manual and it still says 5w-30 as the best choice for the vehicle....

Odd since I thought there was a TSIB released for 5w-20?
Old 10-29-07, 01:29 AM
  #97  
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Seems like they should have updated the manual.......probably cheaper to leave it as is though.
Old 11-12-07, 08:13 PM
  #98  
tmag
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Just got my oil changed for my 10K went with Amsoil 5W30 (shop was out of mobil 5W20). I know lexus now recommends 5W20, but is there a big difference especially in a place that doesn't get too cold?
Old 11-14-07, 01:49 AM
  #99  
inLine4
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Valvoline 5W-20 is good enuff for me.
Old 11-14-07, 10:25 AM
  #100  
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Must be something they recommend back east in the colder climates.

My dealer (Newport Lexus, Newport Beach, CA) tells me there is NO change in there oil recommendations. He checked and could not find any TSB on the subject. I looked at the caps (oil) on the showroom floor and all still state 5/30......
Old 11-14-07, 11:30 AM
  #101  
Joeb427
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Originally Posted by Gtidan
Must be something they recommend back east in the colder climates.

My dealer (Newport Lexus, Newport Beach, CA) tells me there is NO change in there oil recommendations. He checked and could not find any TSB on the subject. I looked at the caps (oil) on the showroom floor and all still state 5/30......
There's something in writing about using 2w20 but I'm sticking with 5w30.
Old 11-14-07, 12:07 PM
  #102  
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Originally Posted by Gtidan
Must be something they recommend back east in the colder climates.

My dealer (Newport Lexus, Newport Beach, CA) tells me there is NO change in there oil recommendations. He checked and could not find any TSB on the subject. I looked at the caps (oil) on the showroom floor and all still state 5/30......

Dealer didn't look hard enough then-

http://is350.grantham-international....mmendation.pdf

5W20 has been the "offically" recommended oil since at least March 29, 2006.

Nobody seems to know why Lexus hasn't changed the printing on their oil caps though
Old 11-22-07, 08:47 PM
  #103  
Gtidan
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Originally Posted by Kurtz
Dealer didn't look hard enough then-

http://is350.grantham-international....mmendation.pdf

5W20 has been the "offically" recommended oil since at least March 29, 2006.

Nobody seems to know why Lexus hasn't changed the printing on their oil caps though
I have no idea either but as I said all the cars I looked at in the last week or so are still showing 5/30 on the oil cap. And both Westminster Lexus and Newport Lexus are still filling with 5/30 and are not changing anytime soon.

Using the oil cap recommendation as a guide than this is what the TSIB notice says and I'm cutting and pasting here

NOTE:
The recommended viscosity grade for this oil differs according to vehicle model.
Use the recommended grade specified on the oil filler cap or in the Repair Manual
or Owner’s Manual for each vehicle.


Me? I'm sticking with my 5/30 full synthetic and moving on. I'm not cruising across the Mohave desert in 120 degree heat with a 5/20 oil. On the other hand if I lived in Minnesota I would definitely would use a 5/20 oil in the winter. JHMO
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Last edited by Gtidan; 11-22-07 at 08:50 PM.
Old 11-24-07, 01:37 PM
  #104  
gsrthomas
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I still use 5-30.
Old 11-24-07, 02:13 PM
  #105  
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how many miles is it okay to leave Quaker state's full synthetic running in an is250? I drive very economically...


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