Hyundai 3.8L V-6 GDI OCIs

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Philth

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Just would like to ask the community here about your general opinions on "extended" drains on a GDI engine.

My '12 Genesis Sedan has the 3.8L V-6 GDI engine. Per the manual, normal service is described as 7,500 mile OCI, and severe is 3,750 OCI. Since the first oil change, I have been using M1 5w30 EP, along with an OEM oil filter; 7,500 mile changes. Odometer currently reads 28,000 and change.

I have not ran any labs on the oil, as I don't see a need to while it's still in warranty and I cannot exceed 7,500 mile changes.

I'm just curious as to any GDI owners who has successfully ran extended OCIs on their engines. I'm considering going to 3,750 mile changes, as I have been reading fuel dilution might be a concern.
 
I would not arbitrarily change the OCI based on what might be. If you are concerned get a UOA performed. Not all DI engines have shown fuel dilution issues that show increased wear. Ed
 
I got 12 hyundai accent and run oil 7k miles on 5w20 pennzoil synthetic. When its cold like NOW i just let it idle till i comes down to 1000rpm and then ease the first couple miles. i think the synthetic is more robust and will be fine from fuel being as big a factor as many consider. 7k miles is where i like to be for oil change and tire rotation. I also run approx. 1/3 can oil Liquimoly Mos2 each oil change and I have read it like a 30wt mineral oil viscosity so..it gives me an obese 5w20. Cold starts are easier for synthetic so it must be better for EVERYTHING,maybe Thanks for your service Philth!
 
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My wife and I have this engine and change the oil under the severe service recommendation.

We make a lot of short trips + a lot of stop and go city driving. Both are hard on the oil.

That and you must keep up your factory warranty.

Considering the price of the oil and filter it really is not worth trying to do extended oil changes with that DI Engine without having the oil checked. Considering the cost of that why not just change the oil and filter and not worry about it.
 
One interesting note that I would like to mention, Hyundai does not define what short distances are, mileage-wise.

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Originally Posted By: Marco620
Thanks for your service Philth!


Thanks! Will be wrapping up a 20+ year career next Feb.
 
I have a quick question with regards to the Mobil "warranty".

My Genesis is still under Hyundai powertrain warranty. Normal OCI is 7,500 miles. Severe is 3,750 miles.

M1's site says to change the oil in accordance with OEM warranty. So, if Hyundai is telling me that my car is in a severe service category, I need to change my oil at 3,750 miles?

If I keep everything the same as is now (7,500 OCI), and Hyundai gives me issues for an unexpected engine oil related failure, will Mobil step up for repairs?
 
Originally Posted By: Philth
I have a quick question with regards to the Mobil "warranty".

My Genesis is still under Hyundai powertrain warranty. Normal OCI is 7,500 miles. Severe is 3,750 miles.

M1's site says to change the oil in accordance with OEM warranty. So, if Hyundai is telling me that my car is in a severe service category, I need to change my oil at 3,750 miles?

If I keep everything the same as is now (7,500 OCI), and Hyundai gives me issues for an unexpected engine oil related failure, will Mobil step up for repairs?



Who says your in severe service? Most people think they are when they aren't.
 
Originally Posted By: Philth
I have a quick question with regards to the Mobil "warranty".

My Genesis is still under Hyundai powertrain warranty. Normal OCI is 7,500 miles. Severe is 3,750 miles.

M1's site says to change the oil in accordance with OEM warranty. So, if Hyundai is telling me that my car is in a severe service category, I need to change my oil at 3,750 miles?

If I keep everything the same as is now (7,500 OCI), and Hyundai gives me issues for an unexpected engine oil related failure, will Mobil step up for repairs?


I am in the same situation with our KIA. If you read the manual pretty much if you drive the car you are in severe service, ridiculous.

What I did was run a top tier syn for 7k then did a UOA. The UOA shows the oil still had good service life still in it, and it was still 500 miles under their 7,500 max. I feel very protected and within warranty so I'm sticking with 7k OCI's until the warranty is up. Then I'll probably go straight to 10k.
 
I'll most likely do the same. I have M1 5w30EP in it now...is just under 7k miles. I have an oil sample kit and pump coming from Blackstone. Will do a UOA to see where I'm sitting.

BTW - Yes, Hyundai severe service conditions are just about anything. (I posted a copy from the service manual above). They don't require synthetic, so I assume this is the reason why; to plan for a worst case scenario when using cheap oil.
 
just did a uoa (3rd change since new) w/ penn ultra and the analysis showed 4% fuel.it's been very cold here and i have a remove starter so i use that.mostly highway km's.
i need to keep an eye on that.i would use severe service on a gdi
engine.
 
Originally Posted By: Philth
M1's site says to change the oil in accordance with OEM warranty.

No. "The Mobil 1 limited warranty is valid for 10,000 miles or your vehicle's OEM recommended oil change interval, whichever is longer," cut and pasted from here.
 
Originally Posted By: Garak

No. "The Mobil 1 limited warranty is valid for 10,000 miles or your vehicle's OEM recommended oil change interval, whichever is longer," cut and pasted from here.


It also says, "Be advised that if your vehicle is covered by a warranty, you should follow the vehicle’s oil life sensor or the oil change interval recommended in your owner’s manual to avoid a disruption in your vehicle warranty. Follow your owner’s manual if the vehicle is operated in any of the following severe services: racing or commercial applications including taxis, limousines, etc.; frequent towing or hauling; extremely dusty or dirty conditions; or under excessive idling conditions."
 
Oh, certainly. They're not going to "forbid" you from following your OM or OLM. Of course, they trot out the taxi chestnut. Taxis are among the easiest vehicles in which to actually extend the OCI.
 
Sounds good, and thanks for pointing that out. So bottom line, even though Hyundai may deny a warranty, I can always fall back on Mobil for 10K with their M1, and 15K with their M1 EP?
 
Technically, yes. The point is that XOM has confidence in its oil over such an OCI and that the oil will sufficiently serve its purpose over that OCI. Their mention of the OEM OCI, though, is likely to avoid stepping on manufacturers' toes and to point out that 10,000 mile guarantees don't mean much if you don't keep levels up.

Personally, with a vehicle with a short, OEM OCI, under warranty, I'd be more likely to select a cheaper conventional (where feasible - obviously some 0w-20 applications preclude this) and follow the OEM interval than grab M1 and go 10,000 miles.

So few engines experience lubricant related failures that it's almost a non-issue. If the engine doesn't have a manufacturing defect and it's operated in a remotely sensible manner, what are the odds that it's going to fail due to a lubricant related issue?
 
Point understood and taken.

I'm about ready to deploy for 6 months and my wife will be driving the car. I don't really trust people working on my cars, so using a product like M1 5w30EP is ideal in my situation.
 
I don't blame you in the least. I don't let anyone do oil changes for me. I local business I do some promotions with wanted to throw me some free oil changes. I'd only let them give me some Hastings filters. I'll do the changes, thanks.
wink.gif
 
Anything more than 7,500 miles on a GDI engine and I would be investing in a Blackstone oil sample !
 
The absolute limit on my GDI is 7,500. I still plan on drawing a sample prior to oil change, just to make sure everything is peachy.
 
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