2016 Toyota Corolla 1.8L - Supertech 0w-20 synthetic

[bonedaddy4538]

OP if you wish to double your interval to spend less time under the car you should run castrol edge EP in 0w-20 or 5w-30 if you want but isn't necessary and a better filter like a fram ultra or endurance. What is your trans maintenance like and do you have the 4spd or the cvt?

Cvt and I did like 4 qts fluid exchange at around 60k miles. Might do again around 80k. I used valvoline cvt fluid too and it didn’t explode from using non Toyota fluid like everyone seems to think(they’re wrong)

 

[bonedaddy4538]

What's the starting TBN on the supertech? I wouldn't double the interval with 2.8 tbn remaining, I'd be hesitant to increase it at alln especially through winter (sitting in traffic doesn't heat up oil much, so acid formation from fuel and water prsence is a concern). I assume the 5.6k was essentially over summer? then again, californian winters....

Did you add top off oil? I know the report says no, but just double checking as it matters a lot.

No top off. Also sitting in traffic should be irrelevant since it’s liquid cooled the oil temp should be relatively stable.(and hot)

 

[Hermann]

I would do 5-6K IIWM. Reason, to keep the oil control rings free and working properly.

 

[Jetronic]

No top off. Also sitting in traffic should be irrelevant since it’s liquid cooled the oil temp should be relatively stable.(and hot)

You're in for a surprise then. Not even with special oil/coolant heat exchangers is the oil temperature stable.

 

[TomYoung]

Or maybe ok to extend with a 30 weight?

Do tell? What is this relationship between oil change interval and oil weight?

 

[ATex7239]

Do tell? What is this relationship between oil change interval and oil weight?

Viscosity loss.

 

[TomYoung]

I would do 5-6K IIWM. Reason, to keep the oil control rings free and working properly.

One of many great reasons to keep the OCI short in this (and any) vehicle. Great advice.

 

[bonedaddy4538]

You're in for a surprise then. Not even with special oil/coolant heat exchangers is the oil temperature stable.

 

[Averroes]

Dude, just stick to 7500 miles for the next oci. If you see TBN at 2.8 at 5xxx miles (with given driving conditions) why push for 10k miles?

Be nice to the car, it’ll be nice to you.

 

[bonedaddy4538]

Dude, just stick to 7500 miles for the next oci. If you see TBN at 2.8 at 5xxx miles (with given driving conditions) why push for 10k miles?

Be nice to the car, it’ll be nice to you.

Only because its not likely to be a super huge issue. When I get to 10k and the oil is either ok or on the edge not like it will implode that first oil change. I am not trying to keep a car 300k miles like most people on here

 

[Gene K]

Only because its not likely to be a super huge issue. When I get to 10k and the oil is either ok or on the edge not like it will implode that first oil change. I am not trying to keep a car 300k miles like most people on here

1. It's a Blackstone Test (Lower TBN than Polaris in my experience).

2. TBN is likely 60% of what it would have been at 1000 mi with their test.

As long as you are going to do a UOA at 10,000 mi the next time I have no issue with it.

 

[himemsys]

1. It's a Blackstone Test (Lower TBN than Polaris in my experience).

2. TBN is likely 60% of what it would have been at 1000 mi with their test.

Polaris uses D2896 while BS uses D4739. D2896 will always show higher results because it is a different method. But Polaris is one of the only labs that uses D2896 for used oil. According to the ASTM, used oil should be tested with D4739.

 

[Reloader59]

To each their own do what you like and I’ll do what I like

It's just a recommendation, like others. You don't need to be a jerk about it!

 

[himemsys]

According to my calculations, if TBN depleted linearly (which we know it doesn't), then at a TBN of 1.0, it would've reached 8400 miles. At a TBN of 0.0, it would've reached 9900 miles. So yeah. It will probably get to 10k without exploding. LOL.

 

[Nathan]

I would run the 5w20 if you want to go past 6k.

 

[Reloader59]

Very nice report! I would go 6k and call it the day. TBN is getting low and you don't want build up in your oil rings

 

[We're Metals]

I would run the 5w20 if you want to go past 6k.

What would this do?

 

[wemay]

Great report! Super Tech for the win.

 

[Gene K]

What would this do?

I think he is assuming the 0W-20 is using a lower viscosity base stock and has increased VII . His thought is VII shearing is primarily responsible for the viscosity loss.

However it's entirely possible that the 0W-20 is using a higher VI base stock of similar viscosity at operating temp and the same or less VII and might be at least as shear stable as the 5W-20.

 

[kschachn]

I think he is assuming the 0W-20 is using a lower viscosity base stock and has increased VII . His thought is VII shearing is primarily responsible for the viscosity loss.

However it's entirely possible that the 0W-20 is using a higher VI base stock of similar viscosity at operating temp and the same or less VII and might be at least as shear stable as the 5W-20.

Plus being a Blackstone analysis you have no accurate indication of how much fuel is in that sample, much less how much actual mechanical shear of the VM is occurring - if any.