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GDI Oil Consumption Cause(s) ? #5339791 02/03/20 07:45 AM
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ChrisD46 Offline OP
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In my experiment to run QSUD 5W20 I have already added 1 qrt. of make up oil by the 3,100 mile mark on my way to a 3,750 mile severe service OCI . I wouldn't even consider my driving anything other than average suburban driving with my daily work commute being 40 ~ 45 minutes one way . Both the older PFI engines in my signature don't burn a drop of oil during a OCI - not the case with the newer GDI Sonata , so what gives with GDI engines using / burning oil when broken in by the book and factory fill changed at 1K miles with synthetic oil used it's whole life to date ?


'17 Hyundai Sonata 2.4L GDI 5W20 QSUD / Fram Ultra #9688
'10 Hyundai Elantra 2.0L 5W30 (50%) / 5W20 (50%) QSUD / Fram Ultra #9688
'07 Kia Sedona 3.8L 5W30 Castrol EP / Fram Ultra #9999
Re: GDI Oil Consumption Cause(s) ? [Re: ChrisD46] #5339797 02/03/20 07:53 AM
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supton Offline
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Might be reading too much into one data point? Loads of non-DI cars burned oil, so much so that many of the OEM's have had a policy for years of stating that 1qt/1k (or 1qt/1.5k, depends on who) was "acceptable" oil consumption. Thin oil, low tension rings, and who knows what else--some engines like to consume oil more than others, and that's even within the same engine family.

My wife's Camry typically uses no oil over a 10k OCI. I used PP 10W30 for a change or two, and I think the first time I did, it used a qt over 10k. But not since. shrug


2011 Toyota Camry, base, 2.5L/6MT, 201k, hers
2010 Toyota Tundra DC, 4.6L/6AT, 157k, ours
1999 Toyota Camry LE, 2.2L/4AT, 223k, his
Re: GDI Oil Consumption Cause(s) ? [Re: ChrisD46] #5339803 02/03/20 07:58 AM
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jayjr1105 Offline
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2.0L Skyactiv engine here that's DI. I don't burn a single drop in 7K mile intervals.


2013 Mazda 3 - PP 0w20
2005 Honda Odyssey - PP HM 5w20
Re: GDI Oil Consumption Cause(s) ? [Re: ChrisD46] #5339807 02/03/20 08:03 AM
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skyactiv Offline
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My wife's Audi and my Elantra sport don't consume oil and they both have a GDI-T engine.
The VW GTI I sold my brother needs 1/2 a quart added 4K into the OCI. Sold the VW to my brother at 166K
which he uses for his work car. Pharmacist at WM and doesn't want his new Acura MDX getting dinged up at work.


Wife: 15' Audi A4 quattro 6 speed manual
Me: 18' Elantra Sport 6 speed manual
The rude guy that points out reality


Re: GDI Oil Consumption Cause(s) ? [Re: jayjr1105] #5339811 02/03/20 08:19 AM
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E150GT Online Content
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Originally Posted by jayjr1105
2.0L Skyactiv engine here that's DI. I don't burn a single drop in 7K mile intervals.

Mine burns 1 quart per 3000 miles


1984 Mercedes-Benz 300SD - 100k
1995 F150 XL 4.9 reg cab 5MT - 251k 5w30
2016 Mazda6 Touring 6MT - 68k 5w30
2006 Buick Lucerne CXL 3.8 40k 5w30
Re: GDI Oil Consumption Cause(s) ? [Re: E150GT] #5339841 02/03/20 08:58 AM
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jayjr1105 Offline
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Originally Posted by E150GT
Originally Posted by jayjr1105
2.0L Skyactiv engine here that's DI. I don't burn a single drop in 7K mile intervals.

Mine burns 1 quart per 3000 miles

Turbo model? I don't see how one skyactiv can burn 0 and the next burn 2 quarts during a regular OCI.


2013 Mazda 3 - PP 0w20
2005 Honda Odyssey - PP HM 5w20
Re: GDI Oil Consumption Cause(s) ? [Re: ChrisD46] #5339905 02/03/20 10:27 AM
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circuitsmith Offline
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Originally Posted by ChrisD46
I have already added 1 qrt. of make up oil by the 3,100 mile mark on my way to a 3,750 mile severe service OCI .

I think this consumption is more of a Theta II thing than a GDI thing.

Last edited by circuitsmith; 02/03/20 10:28 AM.

2017 Hyundai Tucson SE FWD
SuperTech synth, 5w-30, 5000mi/12mo OCI
Re: GDI Oil Consumption Cause(s) ? [Re: ChrisD46] #5339913 02/03/20 10:33 AM
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PimTac Offline
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Being GDI has nothing to do with oil consumption. That is up to the individual engine.

My Mazda doesn’t use a drop of oil.


2017 Mazda CX5
Valvoline Advanced Synthetic 0w20
Roki OEM filter.
Re: GDI Oil Consumption Cause(s) ? [Re: ChrisD46] #5339920 02/03/20 10:50 AM
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tiger862 Offline
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You changed oil at 1000 miles so engine was not broke in. Most engines I have seen that used oil was changed early on first change. 1qt at 3k is not bad and could stop as engine breaks in. My van dropped a qt in first 4k but has not used any since which manual states is normal.


Tiger862
2018 Grand Caravan
Re: GDI Oil Consumption Cause(s) ? [Re: ChrisD46] #5340077 02/03/20 03:11 PM
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MONKEYMAN Online Content
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I think I would experiment with a different oil like 5w-30. I like PP 5w-30 in my 2017 Elantra. No mileage penalty that I can tell. What was you oil consumption before QSUD 5W20?


Truth alone triumphs, not untruth.

2017 Elantra SE
Re: GDI Oil Consumption Cause(s) ? [Re: E150GT] #5340089 02/03/20 03:38 PM
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buster Offline
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Originally Posted by E150GT
Originally Posted by jayjr1105
2.0L Skyactiv engine here that's DI. I don't burn a single drop in 7K mile intervals.

Mine burns 1 quart per 3000 miles



Just curious, how did you break-in the engine?

There are a number of things that can cause oil consumption.

My Skyactiv 2.0 didn't burn any at all. I also broke it in with high load in a tall gear. Not sure if that had anything to do with it or not.


2019 Frontier Pro 4X - RGT 5w30
2019 Impreza Sport - OE fill
Re: GDI Oil Consumption Cause(s) ? [Re: ChrisD46] #5340277 02/03/20 07:40 PM
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JasonC Offline
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I personally believe on some engines it is due to fuel dilution.


2012 Buick Verano 2.4
2006 Ford Mustang GT Convertible
Re: GDI Oil Consumption Cause(s) ? [Re: circuitsmith] #5340585 02/04/20 07:40 AM
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ChrisD46 Offline OP
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*I am now leaning strongly to this possibility ... It stinks to do everything proper during break in and taking care of the engine and still have it burn oil !
Originally Posted by circuitsmith
Originally Posted by ChrisD46
I have already added 1 qrt. of make up oil by the 3,100 mile mark on my way to a 3,750 mile severe service OCI .

I think this consumption is more of a Theta II thing than a GDI thing.


'17 Hyundai Sonata 2.4L GDI 5W20 QSUD / Fram Ultra #9688
'10 Hyundai Elantra 2.0L 5W30 (50%) / 5W20 (50%) QSUD / Fram Ultra #9688
'07 Kia Sedona 3.8L 5W30 Castrol EP / Fram Ultra #9999
Re: GDI Oil Consumption Cause(s) ? [Re: tiger862] #5340587 02/04/20 07:42 AM
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ChrisD46 Offline OP
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*Next new vehicle I buy I will not change the oil until 3K miles as changing the oil in my Theta II at 1K miles didn't matter (I did it due to earlier concerns the Theta II may have metal shavings as a result of the engine build) .
Originally Posted by tiger862
You changed oil at 1000 miles so engine was not broke in. Most engines I have seen that used oil was changed early on first change. 1qt at 3k is not bad and could stop as engine breaks in. My van dropped a qt in first 4k but has not used any since which manual states is normal.


'17 Hyundai Sonata 2.4L GDI 5W20 QSUD / Fram Ultra #9688
'10 Hyundai Elantra 2.0L 5W30 (50%) / 5W20 (50%) QSUD / Fram Ultra #9688
'07 Kia Sedona 3.8L 5W30 Castrol EP / Fram Ultra #9999
Re: GDI Oil Consumption Cause(s) ? [Re: MONKEYMAN] #5340589 02/04/20 07:45 AM
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ChrisD46 Offline OP
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*About the same oil usage using 5W20 and 5W30 oils ... I've never run the same synthetic oil twice in a row though .
Originally Posted by MONKEYMAN
I think I would experiment with a different oil like 5w-30. I like PP 5w-30 in my 2017 Elantra. No mileage penalty that I can tell. What was you oil consumption before QSUD 5W20?


'17 Hyundai Sonata 2.4L GDI 5W20 QSUD / Fram Ultra #9688
'10 Hyundai Elantra 2.0L 5W30 (50%) / 5W20 (50%) QSUD / Fram Ultra #9688
'07 Kia Sedona 3.8L 5W30 Castrol EP / Fram Ultra #9999
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