Oil Change - 5w-20 or 5w-30? What everyone is using?
#18
Driver
Thread Starter
Join Date: Jun 2008
Location: CA
Posts: 124
Likes: 0
Received 0 Likes
on
0 Posts
![Default](https://www.clublexus.com/forums/images/icons/icon1.gif)
A Ferrari engine is at the far end of the spectrum compared to a Toyota/Lexus engine. Toyota/Lexus engines are gentle on motor oil so any brand pure synthetic oil will be overkill, especially if you are following the OEM recommended OCI (Oil change interval). With a quality synthetic you can safely use a one year or 10K mile OCI, on our engines.
I've had great results with Amsoil 0w-30. I installed a oil bypass system on my V8 4Runner. I've been using this oil now for 4 years (Never changed) with 40K miles on it and my last UOA shows no end in sight yet. Usually 0w oils have the best additive packages and are the highest quality (For street use) oil each manufacture makes. You can’t go wrong with ANY 0w oil.
http://www.amsoil.com/storefront/sso.aspx
Koz
I've had great results with Amsoil 0w-30. I installed a oil bypass system on my V8 4Runner. I've been using this oil now for 4 years (Never changed) with 40K miles on it and my last UOA shows no end in sight yet. Usually 0w oils have the best additive packages and are the highest quality (For street use) oil each manufacture makes. You can’t go wrong with ANY 0w oil.
http://www.amsoil.com/storefront/sso.aspx
Koz
#19
Lexus Test Driver
iTrader: (11)
![Default](https://www.clublexus.com/forums/images/icons/icon1.gif)
Does the OEM filter last 10K miles? I sure don't want to exceed that but I do run Mobil1 5W30 currently and I plan to switch to Mobil1 0W30. I run about 6000 miles in between but always unsure of the filter efficiency after 6K miles. But it does make me sleep better being in Houston 100+ degree heat..
#20
Driver
Thread Starter
Join Date: Jun 2008
Location: CA
Posts: 124
Likes: 0
Received 0 Likes
on
0 Posts
![Default](https://www.clublexus.com/forums/images/icons/icon1.gif)
Does the OEM filter last 10K miles? I sure don't want to exceed that but I do run Mobil1 5W30 currently and I plan to switch to Mobil1 0W30. I run about 6000 miles in between but always unsure of the filter efficiency after 6K miles. But it does make me sleep better being in Houston 100+ degree heat..
#21
#22
![Default](https://www.clublexus.com/forums/images/icons/icon1.gif)
0w-30, 5w-30, 10w-30, all will provide approx the same protection against thermal breakdown, being that they all have the 30 weight rating. The difference is in the pour rate (ability to flow when cold). The lower the "w" (Winter) rating/viscosity the better flow at start up. The best viscosity to use is the lowest viscosity that falls within the OEM recommended range. Petro based oil is affected more by the "w" rating, that's why you see the graph in the owner's manual with several different viscosities. In reality, a 0w-30 quality synthetic oil will cover that whole range in the owner's manual.
Koz
#23
![Default](https://www.clublexus.com/forums/images/icons/icon1.gif)
Does the OEM filter last 10K miles? I sure don't want to exceed that but I do run Mobil1 5W30 currently and I plan to switch to Mobil1 0W30. I run about 6000 miles in between but always unsure of the filter efficiency after 6K miles. But it does make me sleep better being in Houston 100+ degree heat..
Koz
#24
Lexus Fanatic
iTrader: (10)
Join Date: Nov 2004
Location: Under an IS F since 2008
Posts: 13,441
Received 1,064 Likes
on
586 Posts
![Lightbulb](https://www.clublexus.com/forums/images/icons/icon3.gif)
Originally Posted by Koz
The IS, along with most modern engines are using 5w-20. The “w” represents winter and is the important number to look at when determining cold start flow. The lower the number the better cold flow.
Every IS Model, including the IS-F comes with regular 5w30 oil from the factory in Japan..
It's printed on the Oil Cap and in the Manual..
This includes the newest IS-F's and the 2010 IS-C's..
To the OP: there is NO new "oil use suggestion" from Lexus and/or Toyota.
On a side note, I change my oil every 5K miles with regular Mobile Clean 5K Oil..
(non synthetic)
![](https://www.mobiloil.com/USA-English/MotorOil/Images/Products/DC5W30_top.gif)
Regards,
Joe Z
Last edited by Joe Z; 08-04-09 at 02:47 PM. Reason: typo
#25
Driver
Thread Starter
Join Date: Jun 2008
Location: CA
Posts: 124
Likes: 0
Received 0 Likes
on
0 Posts
![Default](https://www.clublexus.com/forums/images/icons/icon1.gif)
^^ FYI Koz...
Every IS Model, including the IS-F comes with regular 5w30 oil from the factory in Japan..
It's printed on the Oil Cap and in the Manual..
This includeds the newest IS-F's and the 2010 IS-C's..
To the OP: there is NO new "oil use suggestion" from Lexus and/or Toyota.
On a side note, I change my oil every 5K miles with regular Mobile Clean 5K Oil..
(non synthetic)
![](https://www.mobiloil.com/USA-English/MotorOil/Images/Products/DC5W30_top.gif)
Regards,
Joe Z
Every IS Model, including the IS-F comes with regular 5w30 oil from the factory in Japan..
It's printed on the Oil Cap and in the Manual..
This includeds the newest IS-F's and the 2010 IS-C's..
To the OP: there is NO new "oil use suggestion" from Lexus and/or Toyota.
On a side note, I change my oil every 5K miles with regular Mobile Clean 5K Oil..
(non synthetic)
![](https://www.mobiloil.com/USA-English/MotorOil/Images/Products/DC5W30_top.gif)
Regards,
Joe Z
#26
![Default](https://www.clublexus.com/forums/images/icons/icon1.gif)
Anyway, to the OP, the climate in So. Cal. isn't so extreme (in most cases) to necessitate a synthetic oil or a 0w-30. I think many people here, myself included, just want to use what has been shown to be better alternatives. Also, if we can safely squeeze a little more mileage out of our oil and decrease oil change frequencies then few here would object to doing so.
#29
Lexus Fanatic
iTrader: (10)
Join Date: Nov 2004
Location: Under an IS F since 2008
Posts: 13,441
Received 1,064 Likes
on
586 Posts
![Lightbulb](https://www.clublexus.com/forums/images/icons/icon3.gif)
(it was a short interval on some MY 2006 Lexus/Toyota Engines)
and
Nope, neither the caps or manuals have ever had 5w20 printed on/in them...
That's a Fact..
Joe Z
![Big Grin](https://www.clublexus.com/forums/images/smilies/biggrin.gif)