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Understanding TSBs regarding oil (Yaris) #4100374 05/18/16 06:20 PM
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geetar Offline OP
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Hi all,

I posted on here a while ago regarding an oil recommendation for a 2000 Yaris with the 2NZ-FE engine and got some great information. (concluded to stick with 5w30 as stated in the handbook)

Since then, I've bought another Yaris, this time with the 1NZ-FE engine and noticed the oil recommendation in the handbook is 10w30.

Despite this, I came across a TSB (EG018-06) from Toyota which states ILSAC GF-4 SAE 5W-20 or ILSAC GF-4 SAE 0W-20 will perform better in the 1NZ-FE engine. However it says it only applies to 2006 - 2007 models and mine is a 2003.

So what should I go for? 0w20 seems like an extreme difference from the 10w30 that was originally put in it. Does the TSB only apply to newer models with the 1NZ-FE engine due to different materials used or ECU maps?


I'm paying attention to oils because I do a few track days per year and a mixture of highway and stop/start in the city.

Re: Understanding TSBs regarding oil (Yaris) [Re: geetar] #4100385 05/18/16 06:38 PM
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kschachn Online Content
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Well I can tell you that I've used 0W-20 in my 1NZ-FE starting at around the 100,000 mile mark. It has been over 150,000 miles so far and no issues. For me it makes it much quieter in the winter and easier to start, but I live in a cold area. For you I don't think it would matter much.

Originally Posted By: geetar
Hi all,

I posted on here a while ago regarding an oil recommendation for a 2000 Yaris with the 2NZ-FE engine and got some great information. (concluded to stick with 5w30 as stated in the handbook)

Since then, I've bought another Yaris, this time with the 1NZ-FE engine and noticed the oil recommendation in the handbook is 10w30.

Despite this, I came across a TSB (EG018-06) from Toyota which states ILSAC GF-4 SAE 5W-20 or ILSAC GF-4 SAE 0W-20 will perform better in the 1NZ-FE engine. However it says it only applies to 2006 - 2007 models and mine is a 2003.

So what should I go for? 0w20 seems like an extreme difference from the 10w30 that was originally put in it. Does the TSB only apply to newer models with the 1NZ-FE engine due to different materials used or ECU maps?


I'm paying attention to oils because I do a few track days per year and a mixture of highway and stop/start in the city.


1994 BMW 530i, 246K
1996 Honda Accord, 280K
1999 Toyota Sienna, 420K
2000 Toyota ECHO, 281K
Re: Understanding TSBs regarding oil (Yaris) [Re: geetar] #4100394 05/18/16 06:53 PM
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geetar Offline OP
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OK thanks for the advice.

I'm looking at Gulf Ultrasynth X 5W-20 which is ILSAC GF-5, would this be suitable as its rated higher than GF-4?

Re: Understanding TSBs regarding oil (Yaris) [Re: geetar] #4100404 05/18/16 07:10 PM
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CT8 Offline
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Why would you want to run a 20wt?

Re: Understanding TSBs regarding oil (Yaris) [Re: geetar] #4100405 05/18/16 07:11 PM
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Trav Offline
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Originally Posted By: geetar


I'm paying attention to oils because I do a few track days per year and a mixture of highway and stop/start in the city.


Don't even consider xw20, zero benefits only added risk. Despite what the xw20 fan boys claim the TSB is not applicable to your engine.


ASE L1, Master. Deutsch Meisterbrief.
Re: Understanding TSBs regarding oil (Yaris) [Re: geetar] #4100420 05/18/16 07:28 PM
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Personally , I'd stick with the 5w30 or 10w30 - just my 2cents


16 Civic-QSUD 0W-20, XG7317
14 Civic-PP 0W-20, XG7317
05 Chevy 2500HD-QSUD 10W-30, PF61E
97 Accord Wagon-Napa Performance 5W-30, Napa 21334
Re: Understanding TSBs regarding oil (Yaris) [Re: geetar] #4100421 05/18/16 07:30 PM
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demarpaint Offline
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If they didn't mention your engine in the TSB then don't use the 0W20. I'd use 5W30 in it.


God Bless Our Troops

Re: Understanding TSBs regarding oil (Yaris) [Re: Trav] #4100423 05/18/16 07:33 PM
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geetar Offline OP
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Why isn't the TSB applicable?

The handbook wants a viscosity that is impossible to find other than from Toyota and the TSB isn't appropriate? Might end up just going for 5w30 even though its not appropriate for the temperature according to handbook.

Edit: The TSB is for my engine but not my year of manufacture. I think the engine was available at different times in different markets across different models.

Last edited by geetar; 05/18/16 07:35 PM.
Re: Understanding TSBs regarding oil (Yaris) [Re: geetar] #4100432 05/18/16 07:48 PM
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simple_gifts Offline
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Lots of miles on my 1NZ-FE using 20 weight oil.


2004 Prius; 118K; ALM
2007 Yaris 89K ATM
2006 B2300;135K;ALM


Was driving an ox cart; Now on the USS Enterprise
Re: Understanding TSBs regarding oil (Yaris) [Re: geetar] #4100435 05/18/16 07:52 PM
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Trav Offline
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It may be the same engine code but are all the parts the same? Does the newer model have additional nanny protection in the ECM yours doesn't?
Why didn't Toyota back spec to 2003? The exact reason not someones guess. Unless you can answer these questions I wouldn't second guess the TSB cutoff date but its your engine.


ASE L1, Master. Deutsch Meisterbrief.
Re: Understanding TSBs regarding oil (Yaris) [Re: geetar] #4100473 05/18/16 08:38 PM
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EPA / CAFE reqs don't go back to 2003, so the models are added in a need to do basis.

Re: Understanding TSBs regarding oil (Yaris) [Re: geetar] #4100522 05/18/16 09:48 PM
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Run what ever helps you sleep better. That engine, like the Honda Fit 1.5l, runs on anything 0w-20 - 10w-30. Really! Those engines are made for the world market and run on a wide range of oil weights. You'll get 200-300k using good oil at the recommended change intervals.

Re: Understanding TSBs regarding oil (Yaris) [Re: geetar] #4100569 05/18/16 11:06 PM
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5W30 would help me sleep better at night.


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Re: Understanding TSBs regarding oil (Yaris) [Re: geetar] #4100581 05/18/16 11:34 PM
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Originally Posted By: geetar
Why isn't the TSB applicable?

The handbook wants a viscosity that is impossible to find other than from Toyota and the TSB isn't appropriate? Might end up just going for 5w30 even though its not appropriate for the temperature according to handbook.

Edit: The TSB is for my engine but not my year of manufacture. I think the engine was available at different times in different markets across different models.


How is 5w30 not apropriate for your temperatures?! My understanding is that it doesnt get too hot or that cold.. So unsure how 5w30 wouldnt work. Id bet 0w20/5w20 would work fine too. Think id go with 5w30 in your shoes.


2007 Corolla Red Pearl 155k miles
PP 0w20 & ST 4967
2015 Toyota Venza Parisian Blue Pearl 25k miles
TGMO 0W20 & OEM filter

Re: Understanding TSBs regarding oil (Yaris) [Re: geetar] #4100601 05/19/16 12:50 AM
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You're in the UK, where xW-20 oils are as common as hen's teeth. Unless you want to buy online at premium or pay a ridiculous sum at a Jaguar dealer, that option's thick as mince.

Stick with a quality xW-30/xW-40 you can pick up at Halford's or CostCo and sleep well at night. I reckon that TSB probably does not apply to the EU anyway.

ACEA > API + ILSAC IMHO.


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