Best Engine Oil for Genesis 2012 V6

[kn5owa]

The Theta, Lambda and Tau engines all get "louder" when you use Castrol, Mobil, Royal Purple, etc.

My "tau" - a V8 for the uninitiated - is virtually silent at idle - with Mobil 5W20 as the fill. Easily the quietest car I have ever had.

And not particularly noisy on rapid acceleration.

 

[Mark_888]

Factory fill for Hyundai is Shell.

The Theta, Lambda and Tau engines all get "louder" when you use Castrol, Mobil, Royal Purple, etc.

I have a Lambda owner (In a Coupe) that has been running Shell Rotella 5W40 for the last 65,000 miles, zero issues or complaints and his UOA looked damn good with 7.5K intervals.

I too recently switched to Shell Rotella 5W40 in my Tau and enjoy the quieter engine and it appears to be a very minimal gas mileage hit.

I have no doubt that if there was a warranty claim on the engine, and Hyundai know you were using 5W-40, they would try and deny the claim.

 

[kn5owa]

I have no doubt that if there was a warranty claim on the engine, and Hyundai know you were using 5W-40, they would try and deny the claim.

I think it's nice to have a little controversy on the forum nowadays - love it - in fact.

But - does Hyundai really have a lab that knows I'm using salad oil (It looks like about 10W-30) instead of the "filter cap 5W-20", that I'm actually using. I doubt it.

And, as far as denial of claims, just know the name, address, and phone # of your lawyer and your local courthouse - You'll have no problem with your dealer - been there - done that.


5W-40 Oil? - would be perhaps my choice in the Sahara Desert.

 

[Mark_888]

But - does Hyundai really have a lab that knows I'm using salad oil (It looks like about 10W-30) instead of the "filter cap 5W-20", that I'm actually using. I doubt it.

If an owner does their own oil changes, and Hyundai asked for proof of oil changes for an engine warranty repair, then receipts would be provided. I am assuming that the viscosity would be listed on the receipt.

The problem with 5W-40 viscosity is it is harder for the oil pump to keep the oil moving around to all the critical engine parts. At the very least, the oil pump has to work harder than designed. Hyundai might try and use that as an excuse to not honor the warranty (if improper oil flow could have caused the defect in the warranty claim).

 

[kn5owa]

If an owner does their own oil changes, and Hyundai asked for proof of oil changes for an engine warranty repair, then receipts would be provided. I am assuming that the viscosity would be listed on the receipt.

The problem with 5W-40 viscosity is it is harder for the oil pump to keep the oil moving around to all the critical engine parts. At the very least, the oil pump has to work harder than designed. Hyundai might try and use that as an excuse to not honor the warranty (if improper oil flow could have caused the defect in the warranty claim).

My view is a little different - The burden of proof would be on the dealer to prove that I'm wrong - and I'm always right -

 

[Mark_888]

My view is a little different - The burden of proof would be on the dealer to prove that I'm wrong - and I'm always right -

Proof of using 5W-40 viscosity would be pretty clear on the receipt.

As far as denying a warranty claim because 5W-40 is out of spec (per the owners manual)--if oil with excessively high viscosity oil could have caused the problem, and they denied a warranty claim because of that, at the very least YOU would have to initiate an appeal or legal challenge to get it fixed under warranty. So I don't know what you mean by dealer having the "burden of proof."

Personally, I think Hyundai acts improperly sometimes in denying warranty claims that they should cover, but in this case I would not budge if I were them. I don't know why people think that 5W-40 is better than 5W-30, especially if the engine and oil pumping system was not designed for such a high viscosity.

 

[84FordMan]

My "tau" - a V8 for the uninitiated - is virtually silent at idle - with Mobil 5W20 as the fill. Easily the quietest car I have ever had.

And not particularly noisy on rapid acceleration.

The noise is well known to non-GDI Hyundai engines. Sometimes called lifter noise, sometimes injector ticking. Never exactly been pinpointed, but the GDI Lambda and GDI Tau did get quieter than their MPI predecessors. The Sedan in general is quieter in the engine bay due to the engine cover and the sound deadening it incorporates. In turn, the Lambda in the Coupe has no real cover (MPI).

 

[84FordMan]

As far as weight, as per the owner's manual, you are 'permitted' to use up to 5W30. In reference to the comment of flow/oil pump:

Shell 5W30
SuS viscosity at 210F - 59.0
cSt viscosity at 100C - 9.94

Mobil 5W20
SuS viscosity at 210F - 54.4
cSt viscosity at 100C - 8.60

Rotella 5W40
SuS viscosity at 210F - 67.3
cSt viscosity at 100C - 12.5

Yes it is thicker, but there is a deeper reason to why I use it, beyond viscosity.

Rotella 5W40
Zinc 1264
Phosphorus 1147

Mobil 1 5W20
Zinc 755
Phosphorus 634

Shell 5W30
Zinc 846
Phosphorus 613

I should also add I have not been under powertrain warranty for some time, so dealerships do not concern me.

 

[Mark_888]

As far as weight, as per the owner's manual, you are 'permitted' to use up to 5W30. ILSAC GF-4.

Yes, I am aware of that, But 5W-40 has a much higher viscosity than 5W-30 at normal engine temps, as you noted above. I would have no problem running 5W-30 in the Tau V-8.

I assume you know that Rotella is designed for diesel engines, mostly trucks. Says that right on the Rotella bottle/jug.

Based on what I have read new engines have roller tappets and don't need the extra zinc and phosphorus. In fact, too much of those additives can foul the emissions system and O2 sensor.

 

[shagnat]

Factory fill for Hyundai is Shell.

The Theta, Lambda and Tau engines all get "louder" when you use Castrol, Mobil, Royal Purple, etc.

I have a Lambda owner (In a Coupe) that has been running Shell Rotella 5W40 for the last 65,000 miles, zero issues or complaints and his UOA looked damn good with 7.5K intervals.

I too recently switched to Shell Rotella 5W40 in my Tau and enjoy the quieter engine and it appears to be a very minimal gas mileage hit.

You're crazy... Plus I have serious doubts that you have tested at minimum 3 oils you listed in those 3 separate engines..... you're gonna' have to prove that.

Additionally, I have a "Tau" engine and use one of the 3 oils you listed and noise is NOT a problem.

Why do people "like you" post such non-provable crap?!?!

______________________________

Help support this site so it can continue supporting you!

 

[PREZN]

Mobil 1 has regular, high mileage, and extended performance lines. Which one do you get?

 

[Mark_888]

Mobil 1 has regular, high mileage, and extended performance lines. Which one do you get?

Don't ever use a "high mileage" oil unless you are experiencing problems such as high oil consumption or leaky seals, regardless of the number of miles on the car.

I have used the following different Mobil 1 varieties:

• Mobil 1 5W-30 (the "regular" one)
• Mobil 1 0W-30 AFE (Advanced Fuel Economy)
• Mobil 1 5W-30 EP (Extended Protection)

At Walmart, a 5-quart jug of EP is only about $2.50 more than the others, so that is what I have been using. But if lived in a cold climate, I would probably use 0W-30 AFE.

 

[84FordMan]

Yes, I am aware of that, But 5W-40 has a much higher viscosity than 5W-30 at normal engine temps, as you noted above. I would have no problem running 5W-30 in the Tau V-8.

I assume you know that Rotella is designed for diesel engines, mostly trucks. Says that right on the Rotella bottle/jug.

Based on what I have read new engines have roller tappets and don't need the extra zinc and phosphorus. In fact, too much of those additives can foul the emissions system and O2 sensor.

It is not uncommon for manufacturers to set factory oil viscosity for maximum gas mileage for two main reasons, chiefly to appeal to the consumer, but not too far beyond that, to keep their CAFE number high enough to avoid a huge fine. Example: In the late-90s/early-00s, Ford issued a TSB taking all of their vehicles from 5W30 and 10W30 recommendations to 5W20 to avoid a near $200 million dollar fine.

Then there are other cases where the factory fill just does not provide enough protection, Hyundai Sonata. Factory fill was 5W20, oil consumption issues and rod bearing issues led Hyundai to recall the engines and switch to 5W30 and install a new dipstick, increasing oil capacity.

Yes I am aware there is the word 'Diesel' on the front of the oil bottle, but what makes it a 'diesel' oil? Just the amount of those two additives above. Take Castrol Edge 5W40, which does not have anything 'diesel' on it's label, zinc =1002, phosphorous =849. The 'diesel' oils, also go for API diesel certifications. Speaking of API, the Rotella 5W40 is also an API SM oil, which is a gasoline oil rating. Hyundai only requires SL (SN is the most current API rating).

Can phosphorous and zinc poison a converter and oxygen sensor? Most certainly, would not recommend this oil for someone that has serious blow-by issues or internal oil leaks.

In closing, you might be surprised Hyundai recommends upwards of 20W50 for the Lambda V6 (Depending on temperature)....

Check out Hyundai TSB 09-EM-003.

 

[Mark_888]

It is not uncommon for manufacturers to set factory oil viscosity for maximum gas mileage for two main reasons, chiefly to appeal to the consumer, but not too far beyond that, to keep their CAFE number high enough to avoid a huge fine. Example: In the late-90s/early-00s, Ford issued a TSB taking all of their vehicles from 5W30 and 10W30 recommendations to 5W20 to avoid a near $200 million dollar fine.

I agree with your assessment. That is why, even though Hyundai recommends 5W-20 on the Tau V8, I would use 5W-30. But 5W-40 is a different animal. I would use Mobil 1 High Mileage Oil if you really wanted the zinc and phosphorus, but those additives can cause expensive emission control problems if there is too much, and I don't believe that there needs to be blow by problems for it cause damage (although I don't claim to be an expert).

What makes it diesel are the certifications, and the viscosity.

I checked out TSB 09-EM-003 for the Genesis Coupe, but it does not match what is in the Hyundai Genesis sedan owners manual, so I don't think it applies ot the sedan. Also, we were talking about the Tau V8, not the Lambda V6.
http://pages.suddenlink.net/daydrea...SERVICE INTERVAL FOR TURBOCHARGED ENGINES.pdf

 

[84FordMan]

You're crazy... Plus I have serious doubts that you have tested at minimum 3 oils you listed in those 3 separate engines..... you're gonna' have to prove that.

Additionally, I have a "Tau" engine and use one of the 3 oils you listed and noise is NOT a problem.

Why do people "like you" post such non-provable crap?!?!

So like photos of me holding that day's newspaper, pouring in a bottle of oil?

If you are asking for my qualifications, owned a Lambda powered Genesis Coupe, Tau powered Genesis Sedan. Coupe was at about 115K when traded in, Sedan is at 61K. My ASE certifications: A1, A4, A5, A7, A8, L1, C1 and P2. C1 and P2 are the only ones I keep current, the rest expired years ago. Associates degree in Automotive Technology. Contributing member to the Hyundai Genesis community since 2011, assisting in developing an aftermarket where there really is none.

Oh, and we are also developing a supercharger for the 4.6L Tau.

 

[shagnat]

So like photos of me holding that day's newspaper, pouring in a bottle of oil?

If you are asking for my qualifications, owned a Lambda powered Genesis Coupe, Tau powered Genesis Sedan. Coupe was at about 115K when traded in, Sedan is at 61K. My ASE certifications: A1, A4, A5, A7, A8, L1, C1 and P2. C1 and P2 are the only ones I keep current, the rest expired years ago. Associates degree in Automotive Technology. Contributing member to the Hyundai Genesis community since 2011, assisting in developing an aftermarket where there really is none.

Oh, and we are also developing a supercharger for the 4.6L Tau.

And that answers my question, how?! Nice attempt at avoiding the question, but, you got to get up earlier than that, Sparky.

 

[OneFunGenesis]

Hello all,

Again, please keep the community respectful and attack ideas and not people.

Thank you

OFG

 

[Sal Collaziano]

we are also developing a supercharger for the 4.6L Tau.

Sounds like you're a vendor... What's the company name?

 

[CarLightTrends]

I've used Mobil 1 full synthetic on all of my personal cars for over 20+ years and have never had a problem. I do change the oil just a bit early around 3,500-4K and it has severed me well.

 

[G-533880]

Thanks for sharing your thoughts. I was looking into trying Castrol Edge with Liquid Titanium 5W-30. Have you tried this one?

I run it and it was fine