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07-12-2018, 01:27 PM | #1 |
Drives: 2012 Toyota Yaris 1.3 -3rd Gen Join Date: Aug 2017
Location: South Africa
Posts: 68
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Oil weight
I'm curious as to what weight of oil everyone uses. On my last service, toyota used 15W-40 which came as a shock. Now the book states it can be used but either 0W-20 or 5W-20 is also acceptable which I feel is a far better weighted oil for a small engine and according to the temperature range application can do more. What is everyone's opinion and what do you use?
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07-12-2018, 01:45 PM | #2 |
Drives: 2007 2-door hatchback Join Date: Jul 2016
Location: USAnotCA
Posts: 750
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Ask "toyota" why 15w-40 was used on this oil change. (please bring answer here. I don't like giving up ANY engine life/protection for the efficiency gain of thin oil...understanding that too thick on cold winter starts isn't good for the engine either.)
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07-13-2018, 06:34 AM | #3 |
Drives: 2012 Toyota Yaris 1.3 -3rd Gen Join Date: Aug 2017
Location: South Africa
Posts: 68
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When I asked they stated it was the general based oil they use on the smaller petrol engines, they also stated due to our climate it is the right oil to use. However, if i follow the weight guide in the book, the range for lighter oils have more versatility than the heavier used in my car. Temperatures rarely drop below 10 degrees here and its for a short amount of the year, otherwise its in the mid 20s to 30s.
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07-13-2018, 09:44 AM | #4 |
Hmm, I see...
Drives: 2012 Toyota Tundra and Yaris Join Date: Oct 2016
Location: Rowlett, TX
Posts: 220
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I run 5W-30 Full Synthetic
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07-13-2018, 10:09 AM | #5 |
Drives: 2007 2-door hatchback Join Date: Jul 2016
Location: USAnotCA
Posts: 750
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I'd then ask why 15w-40 rather than the common 10w-40.
(10F or 10C?) |
07-13-2018, 10:13 AM | #6 |
Drives: street-legal go-kart Join Date: Oct 2008
Location: bowser's castle
Posts: 627
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07-13-2018, 10:28 AM | #7 |
Drives: '08 2zr swapped Vios M/T Join Date: Oct 2012
Location: Caledonia Ont.
Posts: 2,938
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5w30 full syn during the summer at the track (260 degree oil temps and pressure is fine) and I run 0w30 full syn during the winter.
The problem on forums when discussing oil now a days is that there are many people who have been around cars for a couple decades or more but oil technology has come leaps and bounds in the past 10 years. This leads to much advice not necessarily being correct in today's world although it was smart not a long while ago. Case in point - thicker oils offer more protection. Not necessarily true anymore although this would have been the case back when single weight and dyno oils were the main stay. There are a tremendous amount of studies published online that have been performed on new full syn oils of varying weights and their effect on engine components. Problem is these are not always known and are not easy to read not are they fun to read so they often get passed over. Take home point - run a UOA if you want to know how your oil stacks up. This is how I know I can run 20,000km oci's on my oil with track use
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07-13-2018, 10:49 AM | #8 |
Drives: 2014 Yaris SE Join Date: Apr 2014
Location: NYC
Posts: 1,076
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07-13-2018, 05:40 PM | #9 |
It's the illusion you see
Drives: 07 Yaris Sedan Aero Join Date: Oct 2006
Location: Brossard, QC
Posts: 3,888
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Middle East and African countries seem to use quite heavy weight oil. 10w50, 15w40 is regularly seen being used.a
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07-14-2018, 11:38 PM | #10 |
Drives: 2016 yaris Join Date: May 2018
Location: CT
Posts: 39
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I am lucky , I can get any weight I desire, right now I'm using 5w-30, I don't think I am sacrifice any engine e life over using a 10w30 or 10w40
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07-15-2018, 11:02 AM | #11 | |
It's the illusion you see
Drives: 07 Yaris Sedan Aero Join Date: Oct 2006
Location: Brossard, QC
Posts: 3,888
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Quote:
I'm sure you don't see this kind of temperature in CT. Sent from my SM-G930W8 using Tapatalk |
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07-16-2018, 02:14 PM | #12 |
Drives: 2016 yaris Join Date: May 2018
Location: CT
Posts: 39
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Luckily, I don't see those temps. I see the 90's but that's about as high as it goes.
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07-17-2018, 09:32 AM | #13 |
Drives: 2015 Yaris L Join Date: Jun 2017
Location: Illinois
Posts: 94
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Here in the US, 15w40 is the commonly used weight for big truck diesel. I'm not even sure a 15w40 is sold here that doesn't have the diesel engine additive package.
It's not an oil formulated for cars. You can use 15w40 for a car, but it isn't ideal. Of course being OP is in S.A. could change all of that. |
11-12-2018, 07:51 PM | #14 |
Hey, I have an '07 h/b, a/t, w/86k mi. Does anyone use 0W-20 on the 1.5 1NZ-FE in cold weather? I've used 0W-30 and syn 5W-20 in winter, but not 0W-20 yet. Car is not run hard, 'hypermile' type driving 100% of the time, if that matters. Thx!
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11-12-2018, 08:42 PM | #15 |
Drives: '08 2zr swapped Vios M/T Join Date: Oct 2012
Location: Caledonia Ont.
Posts: 2,938
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The 1nz in NA iirc specs 5w30, 0w30 can be used without issue, 0w20 would also likely be fine but isn't technically what the manual specs.
If your focus is fuel efficiency then it may be of slight benefit to you. I use various oil weights in my 2zr engine even though it calls for 0w20 in NA (calls for a different weight in warmer climates). I do this based on my oil temps as a stock engine operating temps for oil are about 220F summer and 180F winter.
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11-12-2018, 10:11 PM | #16 |
thx tmontague :-)
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11-13-2018, 03:09 PM | #17 |
Banned
Drives: 2015 Yaris LE 3door 1F7 Join Date: Feb 2017
Location: Massachusetts
Posts: 963
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use what is specified in the manual unless your going modified or live in an exceptional climate.
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01-17-2019, 04:05 AM | #18 | |
Drives: Yaris 2016 1.3 Manual Join Date: Jun 2017
Location: SAUDI ARABIA
Posts: 125
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Quote:
I am in Saudi Arabia and run using full syn 5w30 all year long from summer reaching average 45 deg C and winter at ~5deg C... This is also what is stated in my manual... But toyota service center dont have the fully synthetic 5w30 available hence i used 3rd party brand lube... |
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