What oil should I use?

[nickpike]

May I emphasise that this applies to a Genesis purchased in the UK.
I don't know the American equivalent oil product names.

In my owners pack is a card recommending oil.
Please see the attached scans, basically the front cover and the rear of the card showing the actual oils recommended.

I've already purchased the Professional AG for my oil change.

 

[Mark_888]

May I emphasise that this applies to a Genesis purchased in the UK.
I don't know the American equivalent oil product names.

In my owners pack is a card recommending oil.
Please see the attached scans, basically the front cover and the rear of the card showing the actual oils recommended.

I've already purchased the Professional AG for my oil change.

Hyundai Motor America (HMA) provides the following specs for motor oil in the 2015 Genesis:

• Lambda 3.8 V6 - API Service SM & ILSAC GF-4 (or above), ACEA A5 or above
• Tau 5.0 V8 - API Service SM & ILSAC GF-4 (or above)

HMA does not specifically "recommend" synthetic oil (and does not require it), but there are obviously many synthetics that meet the above specs (although some like the "premium" Amsoil do not meet the API specs above).

Unless the UK owner's manual includes a provision that specifies synthetic, or has a specification that is only available in synthetic oils (such as a 0W-30), then the card in your owner's pack is not legally binding with regard to oil requirements to maintain the manufacturer's warranty. As noted previously in this thread, the plug for Shell/Quaker State is a paid advertisement (or quid pro quo).

Shell Helix is not routinely available in the US, but the closest Shell product in the USA on that card is probably Pennzoil Ultra Platinum with PurePlus Technology. But there are other brands (such as Mobil 1) that would work just as well.

HMA specifically does not recommend that a 5W-40 motor oil be used for the Genesis.

 

[nickpike]

...........then the card in your owner's pack is not legally binding with regard to oil requirements to maintain the manufacturer's warranty.

Hi,
In the UK, 5W-30 would indicate a fully synthetic.
I see what you are saying, but if Hyundai puts a recommendation card in the owners pack, I fail to see why they would not uphold warranty. Also, the oil meets with the general specification criteria given.

 

[dareckibmw]

Owner's manual '15 page ~480

 

[Mark_888]

Hi,
In the UK, 5W-30 would indicate a fully synthetic.
I see what you are saying, but if Hyundai puts a recommendation card in the owners pack, I fail to see why they would not uphold warranty. Also, the oil meets with the general specification criteria given.

In the USA, 5W-30 does not mean synthetic. There are many 5W-30 and 5W-20 motor oils that are conventional mineral oil.

I am not sure what you are talking about with regard to warranty? Are you talking about the 5W-40 oil mentioned in the card, but not mentioned in the owner's manual specifications? The card is an advertising item, not an official specifications document, although I don't know if they would deny a warranty claim or not if you used 5W-40. I certainly would not use 5W-40 synthetic unless I was driving in conditions where the ambient temperature was routinely above 110F. I certainly would not use 5W-40 in the UK on the Genesis (even though I know that some German cars specify that viscosity in the UK and elsewhere).

 

[hms09]

Made my trip and all is well. Still showing half quart low but exactly where it was when I left for my 1000 mile trip. As Midnightsun says everything is fine. Just wanted to report back.

Thanks for all the replies.

 

[Midnightsun]

Glad to hear all is well.

From past experience on engines in general I always fill oil to 1/8" - 1/4"" less than the full mark after an oil change. I have had and heard of more issues with a little too much oil yet never heard of an issue running anywhere between full and add. Important part is to know where it was filled to after an oil change and this way you have a reference and can tell if it consumes oil. Some consumption may be normal depending on the engine however if you need to add oil in between oil changes (gets to the add mark) then you need to get it looked at as something is wrong.

 

[TroyK]

took the genesis in for an oil change/tire rotation to the nearest dealer today. checked out sales receipt and it says they put 5w20 full synthetic in my 3.8L. interesting!!

 

[Mark_888]

took the genesis in for an oil change/tire rotation to the nearest dealer today. checked out sales receipt and it says they put 5w20 full synthetic in my 3.8L. interesting!!

That is interesting, since if you look at your owner's manual (2015 or 2016) it specifically says 5W-30 or 10W-30 for the 3.8 V6, even though it allows 5W-20 for the 5.0 V8. (See post above for a pic of the owner's manual).

Also, even though your receipt says 5W-20 Full Synthetic, you don't really know what they used.

I don't know why anyone would think dealers know more than the Hyundai owner's manual.

 

[TroyK]

That is interesting, since if you look at your owner's manual (2015 or 2016) it specifically says 5W-30 or 10W-30 for the 3.8 V6, even though it allows 5W-20 for the 5.0 V8. (See post above for a pic of the owner's manual).

Also, even though your receipt says 5W-20 Full Synthetic, you don't really know what they used.

I don't know why anyone would think dealers know more than the Hyundai owner's manual.

yep, using a weight that is not recommended is indeed interesting! if indeed they did use what they say, i'm not too worried about it given that it's supposedly full synth. plus, it's not as if the car gets driven in 100 degree heat at 100 mph very often!

i think i'll email the service manager and ask why they put in 5w20.

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[Mark_888]

i think i'll email the service manager and ask why they put in 5w20.

I hope you have him strapped to a polygraph machine when he responds.

 

[Midnightsun]

Take a look at your filler cap, normally it says what weight right there. In my case it is 5w-20.

 

[TroyK]

I hope you have him strapped to a polygraph machine when he responds.

response i just got back was that in colder weather the lighter oil cuts down on cold start engine clatter. take that for what it's worth.

 

[Mark_888]

response i just got back was that in colder weather the lighter oil cuts down on cold start engine clatter. take that for what it's worth.

Motor oil viscosity has two numbers, the ambient temperature viscosity and the operating temperature viscosity. For example, with 5W-20, the viscosity at start up is "about" 5, and the viscosity when the engine is warm is "about" 20.

So with a 5W-30, the viscosity at startup is also 5, and the viscosity when engine is warm is 30.

So you can take what your dealer says for what it is worth, which is basically zero.

Usually there is a tradeoff between improved gas mileage and engine longevity when selecting motor oil viscosity. For improved engine longevity, 5W-30 is preferred over 5W-20. Auto manufacturers tend to favor the lowest viscosity that they live with, because EPA mileage ratings are extremely important to them.

In the case of the 2015-2016 Genesis 3.8 V6, Hyundai changed the minimum recommended viscosity from 5W-20 (in 2012-2014 V6 engines) up to 5W-30. There must be some reason why they did that. There have been very few (if any) changes to the 3.8 V6 since 2012 when GDI was added.

Not sure where you are living, but in most places it is Spring time and weather will be getting warmer.

 

[TroyK]

Motor oil viscosity has two numbers, the ambient temperature viscosity and the operating temperature viscosity. For example, with 5W-20, the viscosity at start up is "about" 5, and the viscosity when the engine is warm is "about" 20.

So with a 5W-30, the viscosity at startup is also 5, and the viscosity when engine is warm is 30.

So you can take what your dealer says for what it is worth, which is basically zero.

Usually there is a tradeoff between improved gas mileage and engine longevity when selecting motor oil viscosity. For improved engine longevity, 5W-30 is preferred over 5W-20. Auto manufacturers tend to favor the lowest viscosity that they live with, because EPA mileage ratings are extremely important to them.

In the case of the 2015-2016 Genesis 3.8 V6, Hyundai changed the minimum recommended viscosity from 5W-20 (in 2012-2014 V6 engines) up to 5W-30. There must be some reason why they did that. There have been very few (if any) changes to the 3.8 V6 since 2012 when GDI was added.

Not sure where you are living, but in most places it is Spring time and weather will be getting warmer.

i will say that i've really not noticed much clatter (valve or DI) on cold start with my genesis. however, my dad's G1 did clatter quite a bit on cold start. maybe the full synth helps with that. anyway, i'm not particularly worried about it, but did find it curious that they aren't following the recommendation for oil viscosity. it's leased so i'll never know whether or not the lower visc oil affected engine longevity.

 

[lobsenza]

5w-30 is also an acceptable oil for the 5.0. I prefer 0w-30 full synthetic. I think the 30 weight gives better hot protection.

 

[Mark_888]

5w-30 is also an acceptable oil for the 5.0. I prefer 0w-30 full synthetic. I think the 30 weight gives better hot protection.

You can't beat Mobil 1 0W-30 AFE (advanced fuel economy). Excellent engine protection, improved gas mileage, and excellent cold weather starting.