Synthetic engine oil

[toyota62]

Hi Guys.
My RAv4 2AZ-FE engine rebuild due to stuck piston rings.
Toyota replaced 4 pistons and ring set.
After the repair I have done 1700kms how long I have to wait before install fully Synthetic engine oil?
Different people say different things.
I think personally 2000kms is enough for bedding in.
Cheers.
Bob.

 

[901Memphis]

Right now is good.

 

[Dyusik]

Yesterday would be pretty good too. It's motor oil, syn or not. Now butter vs margarine, now that's a topic.

 

[toyota62]

http://www.penriteoil.com.au/pis_pdfs/010 TENTHS RUNNING IN OIL MAY 2015.pdf

I haven't run this oil but this make me nerves.

 

[Garak]

What makes you nervous, that oil or not having used it? Neither makes me nervous.

 

[oilboy123]

You must have the same engine with oil consumption issues that my sister has. She bought her Rav4 with 50k miles on it. Then her oil light starting flickering on her. The dealer told her they needed to check the consumption etc.

Now they are talking about doing the pistons, and or rings on it. I hope yours will be OK after the work.
If you are not sure when to switch. Wait awhile, then switch to a syn oil.

 

[Superflan]

Many engines runs syn straight out from the factory. I understand the rings seal concern about this, but then, how come all that cars don't consume any oils at all ?

Clio 4 D4F740 => 5W40 syn
Koleos M9R800 => 5W30 low saps C4

 

[19jacobob93]

Originally Posted By: Superflan
Many engines runs syn straight out from the factory. I understand the rings seal concern about this, but then, how come all that cars don't consume any oils at all ?

Clio 4 D4F740 => 5W40 syn
Koleos M9R800 => 5W30 low saps C4

 

[Kamele0N]

bad example......French technology.....a.k.a "creative technology" as Citroen says...

LoL Yeenks are so funny....everything that is not FULL synthetic is bad......yeah.....that Yota engin will explode in seconds after ignition....

 

[CourierDriver]

I have never read on any synthetic oil bottle anything about not using said oil on new engines or anything else. Why would they be putting synthetic oil in new cars if it is causing rings not to set....sometimes I think many of us are living on the rumors of the 50s and 40s,imho.

 

[Superflan]

Originally Posted By: CourierDriver
sometimes I think many of us are living on the rumors of the 50s and 40s,imho.


There's something about burn-in (running in) I hear much of the time :

"Dont drive it hard, be light on throttle, keep revs low, etc."

I've always driven the brand new cars & bikes I had "hard" from the start, as soon as the engine, oils & fluids were -- I think -- warmed up...

And always got better performance compared similar cars or bikes, and barely no oil consumption at all.

 

[AKhan87]

Originally Posted By: toyota62
I think personally 2000kms is enough for bedding in.

these are low tension piston rings, they seat upon start up...I have done enough toyota engine rebuilds and I have personally rebuilt a 2AZ-FE, with EngineTech piston rings with perfect success so far.

you only want to change the oil early if there is any break-in material, and this is generally just debris and dirt, I use to do 2000 miles break-in oil change, now i just do an initial 5000 OCI and then run a full synthetic for 10-15k, no issues so far.

 

[toyota62]

Originally Posted By: CourierDriver
I have never read on any synthetic oil bottle anything about not using said oil on new engines or anything else. Why would they be putting synthetic oil in new cars if it is causing rings not to set....sometimes I think many of us are living on the rumors of the 50s and 40s,imho.

from Royal Purple web

Can I put Royal Purple into my brand new car?

Yes. Royal Purple currently offers many viscosity grades of API-licensed motor oils. To allow for proper break-in of the engine, Royal Purple recommends waiting until the manufacturer’s first scheduled oil change or a minimum of 3,000 kms in new gasoline engines. Allow 10,000 to 20,000 kms before using Royal Purple in diesel engines.

 

[toyota62]

from Red Line oil web

Q: Can I break-in my engine on Red Line motor oil?
For peformance engines, we recommend using conventional 10w30 motor oil to ensure proper piston ring seating. We recommend using this oil in combonation with our Engine Oil Break In Additive, which features the antiwear chemicals necessary to protect valve train components like camshafts, rollers, and tappets. Though most conventional oils are missing the important antiwear components that you find in Red Line's synthetic motor oils, the conventional oil is not as slick as Red Line and will allow the piston rings to seat more quickly. If you allow 1500 to 2000 miles in a street engine or 20 to 30 minutes on the dyno at low rpm, the rings will have had sufficient time to seat and the high initial break-in wear will have occurred. For new road cars, always follow the manufacturer recommendations and initial oil change recommendations for break-in.

 

[toyota62]

But Mobil 1 web site

Is it true that new engines need break-in periods using conventional motor oil?
That is a myth. In the past, engine break-in was necessary to remove metal flashing or any other abrasive material left inside the engine after machining, as well as to allow the valves and rings to "seat" properly. Today's engines are built with much tighter tolerances and much improved machining, and under much cleaner conditions compared to the engines of 10 or 20 years ago. Current engine manufacturing technology does not require a break-in period using petroleum-based motor oils.

 

[toneydoc]

New Toyota engines come with synthetic oil in them from the factory. Does not matter what type of oil for break in period. As long as it has oil in it of course

 

[HerrStig]

Originally Posted By: toyota62
But Mobil 1 web site

Is it true that new engines need break-in periods using conventional motor oil?
That is a myth. In the past, engine break-in was necessary to remove metal flashing or any other abrasive material left inside the engine after machining, as well as to allow the valves and rings to "seat" properly. Today's engines are built with much tighter tolerances and much improved machining, and under much cleaner conditions compared to the engines of 10 or 20 years ago. Current engine manufacturing technology does not require a break-in period using petroleum-based motor oils.
+1

 

[CT8]

Originally Posted By: Dyusik
Yesterday would be pretty good too. It's motor oil, syn or not. Now butter vs margarine, now that's a topic.
Organic butter

 

[MolaKule]

Originally Posted By: toyota62
Hi Guys.
My RAv4 2AZ-FE engine rebuild due to stuck piston rings.
Toyota replaced 4 pistons and ring set.
After the repair I have done 1700kms how long I have to wait before install fully Synthetic engine oil?
Different people say different things.
I think personally 2000kms is enough for bedding in.
Cheers.
Bob.


Did Toyota machine the block or cylinders before inserting new pistons or rings or bearings? Exactly what did Toyota do? It makes a difference.

In any rebuilt engine (not a factory short block or new engine) I think it is a good idea to run a 30 grade mineral oil, such as the Amsoil BRK, for 500 miles minimum.

If there is no oil consumption at the end of run, you're good to go with the OEM spec oil.

 

[CT8]

The syn oil companies don't want the new engine to fail when using their oils.