What Oil weight do you run?

[R2D2]

Recommended weight is 5W-30.

A TSB was issued recommending ILSAC GF-4 and ok-ing the use of 5W-20.

I have used 20 wt exclusively. I currently am running (and intend to stick with) Renewable Lubricants BIOSYN 0W-20.

[GeneralDon7]

I switched to 5w-20 after 10,000 miles. Recommended should be 5w-30 like above post said. Definatly noticed an engine response and fuel economy benefit when switched.

[TheSilkySmooth]

Originally Posted by R2D2

Recommended weight is 5W-30.

A TSB was issued recommending ILSAC GF-4 and ok-ing the use of 5W-20.

I have used 20 wt exclusively. I currently am running (and intend to stick with) Renewable Lubricants BIOSYN 0W-20.

It is not "back spec'd". All yaris are spec for 5w-30 or heavier in severe service. Warning on TSB says to run what is on the oil fill cap and thats 5w-30.

[sbergman27]

Originally Posted by R2D2

A TSB was issued recommending ILSAC GF-4 and ok-ing the use of 5W-20.

Actually... no. That TSB has been widely misinterpreted in this forum. Read it carefully, paying close attention to the *title* of the TSB, and particularly to the text in the *second red box*.

The TSB was OK'ing GF-4 rather than GF-3, and further stating that certain future engines would be OK with 5w20 and/or 0w20. So far as I know, no current Yaris engines are really supposed to be using Xw20 oils.

-Steve

[R2D2]

Originally Posted by sbergman27

Actually... no. That TSB has been widely misinterpreted in this forum. Read it carefully, paying close attention to the *title* of the TSB, and particularly to the text in the *second red box*.

The TSB was OK'ing GF-4 rather than GF-3, and further stating that certain future engines would be OK with 5w20 and/or 0w20. So far as I know, no current Yaris engines are really supposed to be using Xw20 oils.

-Steve

This was posted in the 5W-20 TSB thread.

Originally Posted by newhavenpatriot

Hey all,

I don't post here regularly, but I wanted to share an email communication I had with a Toyota Customer Service representative regarding the EG018-06 bulletin. Below are both the email I sent and the email I received back. Looks like it is A-OK to use 5W-20 in the Yaris.


Subject
Toyota Service Bulletin EG018-06

Customer (Joshua Smith) 10/16/2009 08:42 PM

Greetings,

I have a question regarding the correct oil type to use in a 2007 Yaris Hatchback. Unless I'm mistaken, my car has a 1NZ-FE engine, which is listed in the Toyota Service Bulletin EG018-06 as an engine that can use 5W-20 oil. My oil cap and manual both say 5W-30 is recommended, but in the service bulletin, Toyota says that 5W-20 may be used -- and a direct quote from the service bulletin states the following: "This oil is superior in terms of fuel economy, engine protection, and cold starting performance." Please let me know if 5W-20 is safe to use, and if it is not, I'd like to know why. I'd prefer to use 5W-20 for the better fuel economy and cold weather starting performance, as my car sometimes hesitates to turn on when it's very cold out.

There are a lot of people who have discussed/debated the EG018-06 issue on online message boards and none of us can come up with a solid answer. I'd like to get an official response from Toyota and put this to rest. Please also include a list of which specific Yaris models/years (broken down by VIN# range or some similar method) this covers so I can give some people a definitive answer for their Yarises. Thanks very much in advance for your time and effort.

Regards,
Joshua Smith



Response (RTou) 10/22/2009 08:00 AM

Dear Mr. Smith,

Thank you for contacting Toyota Motor Sales.

We appreciate the opportunity to respond to your inquiry.

Toyota recommends the use of ILSAC multigrade, 5W-30 Toyota Genuine Motor Oil or equivalent for the 2007 Yaris. Toyota also recommends, due to its superiority in terms of fuel efficiency, engine protection, and cold starting performance, the use ILSAC GF-4 SAE 5W-20 engine oil for the 2007 Yaris (no specified VIN range).

Thank you again for contacting Toyota.

If we can answer any further questions, please feel free to http://www.toyota.com/help/contactus.html.

Renee Toussaint
Toyota Customer Experience

Note the words used are recommended, not required.

The NZ series is listed in the column for engines that can use 5W-20.

For those folks who are scared of 20wt oils, some of the conventional 5W-30's people use shear down to 20wts in short order anyway, it just goes unnoticed because most people don't have their used oil analyzed. Not a big deal under most circumstances.

Also for clarity I realize that 0W-20 is not recommended. It stands to reason however that there is in reality no difference between 5W-20 and 0W-20 to the engine except for improved cold performance as long as the 0W-20 is a quality, shear stable formulation.

SilkySmooth is not wrong for running a 10W-30 HDEO if he is really running his car hard for long periods of time and elevating the oil temp. I don't think the particular 0W-20 I choose to use in my Yaris is a bad decision either given the fact most of my trips are under 10 mi in cold weather, and the oil hardly has time to reach normal operating temperature. Plus I drive like an old lady.

People should use what they are most comfortable using in there own cars. It is your car after all. In reality this is all really splitting hairs.

R2