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#4752124 - 05/09/18 03:43 PM Synthetic Oil for Direct injection
Joeescape63 Offline


Registered: 05/08/17
Posts: 16
Loc: New York/USA
My new 2018 Subaru Forester has the 2.5L N/A engine.My question is can a synthetic motor oil like Valvoline Advanced Synthetic really make a difference in a direct injection engine with or without a turbo buy cutting down on the deposits or is it marketing hype?Thanks Joe
_________________________
2018 Subaru Forester Touring
2.5L engine/CVT
Subaru FIlters

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#4752142 - 05/09/18 04:03 PM Re: Synthetic Oil for Direct injection [Re: Joeescape63]
Boomer Offline


Registered: 09/19/08
Posts: 1925
Loc: Pennsylvania
I don't know about deposits but DI gas engines like I have in my VW All Track suffer from fuel dilution of the oil. The more robust syn oils may maintain adequate lubrication longer (so the story goes) than non-synthetics. I use the recommended synthetic Castrol in my VW and I change it every 5000 miles.
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2013 VW Passat TDI SE, 56,150 miles Castrol Professional VW507 5W-30
2017 VW Golf All Track 13,850 miles Castrol Professional VW505 10W-40

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#4752183 - 05/09/18 05:00 PM Re: Synthetic Oil for Direct injection [Re: Joeescape63]
PandaBear Offline


Registered: 08/05/02
Posts: 14169
Loc: Silicon Valley
I remember one article I read, that a Korean research shows that Group 4 based stock oil has a lower tendency of valve deposit if changed more frequently.

My guess is it has to do with ash and Noack.
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"You keep asking questions PandaBear and you'll end up a vegetarian like my wife" - Camu Mahubah

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#4752194 - 05/09/18 05:18 PM Re: Synthetic Oil for Direct injection [Re: Joeescape63]
slacktide_bitog Online   content


Registered: 03/20/08
Posts: 6004
Loc: USA
The difference is most significant with TGDI turbo DI engines, but even non-turbo GDI benefits from it, too smile

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#4752199 - 05/09/18 05:20 PM Re: Synthetic Oil for Direct injection [Re: Joeescape63]
JohnnyJohnson Offline


Registered: 10/22/09
Posts: 2616
Loc: Wet side WA
The real issue is for the manufacturers to fix their direct injection problem rather than just dumping it on their customers like they have done.
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2004 Toyota Corolla 120908
Out: QSUD 5W-30 Purolator One 5030
In: Valvoline ML 5w-30 TG4967 117530 2-8-18
2006 Duramax 73822
Out: T6 5W-40 M1-303
In: T6 5W-40 XG9100 73752 4-22-18

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#4752211 - 05/09/18 05:34 PM Re: Synthetic Oil for Direct injection [Re: Joeescape63]
GravelRoad Offline


Registered: 05/30/15
Posts: 156
Loc: Virginia
When did the FB25 get direct injection ???
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2016 Subaru Outback Premium. PUP 5w30 oem filter
2013 Hyundai Elantra loaded. lifetime free oil/filter change

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#4752237 - 05/09/18 05:56 PM Re: Synthetic Oil for Direct injection [Re: Joeescape63]
trooplewis Offline


Registered: 09/18/09
Posts: 16
Loc: San Diego
I've been wondering about this questions as well, since I have a 2017 Sonata 2.4L that is DI.

Maybe it's not a valid assumption, but I would think that a synthetic would not fry itself onto the valve stems like dino oil would. Sort of the same reasoning that affected the Mini Cooper turbos; if you used dino oil, it coked up the bearings in the turbocharger that were fed with sump oil.

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#4752256 - 05/09/18 06:19 PM Re: Synthetic Oil for Direct injection [Re: Joeescape63]
Imp4 Offline


Registered: 04/06/18
Posts: 247
Loc: Somewhere in time
Originally Posted By: Joeescape63
My question is can a synthetic motor oil like Valvoline Advanced Synthetic really make a difference in a direct injection engine with or without a turbo buy cutting down on the deposits or is it marketing hype?

Cutting down on deposits??? To be determined..... But definitely yes if you believe the marketing hype.

W.R.T. LSPI, this is why API SN+ and dexos1 gen2 were created. Yes they both definitely help to prevent LSPI.
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#4752267 - 05/09/18 06:29 PM Re: Synthetic Oil for Direct injection [Re: Joeescape63]
burla Offline


Registered: 11/07/16
Posts: 246
Loc: sonoma
LSPI is for real, you should really think about using spun micro glass filters and those formulas that were created with gf-6 in mind. Low calcium and higher magnesium formulas like m1 or amsoil. M1 was ahead of the field on the issue, and I'm sure there are many other options.

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#4752273 - 05/09/18 06:36 PM Re: Synthetic Oil for Direct injection [Re: Joeescape63]
burla Offline


Registered: 11/07/16
Posts: 246
Loc: sonoma
read the part that says lubrication and lspi, look at how low calcium affects lspi.

LSPI is near non existent with low calcium oil. m1 costco deal is a great option, but Amsoil also has high moly which is an additional benefit, read the page and identify where they take about moly. M1 also has moly, just less then Amsoil. Two great choices for di turbo's.

Gf-6 is not here yet, but Amsoil and m1 both lowered their calcium for folks just like you that have a di turbo. You are smart for inquiring about it, now make sure you just don't go buying some junk off the walmart shelf that says synthetic and think you did something good for your baby. It has to be a low calcium oil, if you don't want either of the two I suggested, then do your own research and find another low calcium option.

The most important thing you want to use is a low calcium oil. Only 1 lspi event for every 25 that happens with higher calcium.



Edited by burla (05/09/18 06:43 PM)

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#4752290 - 05/09/18 06:49 PM Re: Synthetic Oil for Direct injection [Re: Joeescape63]
burla Offline


Registered: 11/07/16
Posts: 246
Loc: sonoma
Spun Micro Glass filters are Fram Ultra 9 bucks at Walmart, Amsoil EA, Royal Purple, and Wix XP are among the most popular. I just don't trust paper past 3 mos and with these filters there is literally nothing to worry about for years. They aren't gonna get stiff and blow a hole, I've cut my filters open for years, Royal purple filters are still soft and pliable after 2 years in use.

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#4752312 - 05/09/18 07:13 PM Re: Synthetic Oil for Direct injection [Re: burla]
PimTac Offline


Registered: 03/04/17
Posts: 3892
Loc: Soviet State of Washington
Originally Posted By: burla
LSPI is for real, you should really think about using spun micro glass filters and those formulas that were created with gf-6 in mind. Low calcium and higher magnesium formulas like m1 or amsoil. M1 was ahead of the field on the issue, and I'm sure there are many other options.




How does a spun glass filter reduce LSPI?
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2017 Mazda CX-5 Grand Touring

Valvoline Advanced Synthetic 0w20
Mobil 1 M108A EP filter


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#4752335 - 05/09/18 07:32 PM Re: Synthetic Oil for Direct injection [Re: Joeescape63]
nap Offline


Registered: 04/27/18
Posts: 242
Loc: Canada
Problem with these “LSPI events” is that they tend to be catastrophic. Just one is enough. “Reducing” isn’t enough, I want to read “eliminate” instead.

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#4752355 - 05/09/18 08:01 PM Re: Synthetic Oil for Direct injection [Re: Joeescape63]
double vanos Offline


Registered: 08/05/04
Posts: 1866
Loc: 5600 feet elevation, Arizona
Wow. I just run Castrol 0w40 in my ‘11 F150 EB and haven’t given it another thought. I’m at 115k miles and the only thing unusual I do for the truck is run premium. Is it too late for me to start worrying about this.....?
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#4752358 - 05/09/18 08:02 PM Re: Synthetic Oil for Direct injection [Re: Joeescape63]
burla Offline


Registered: 11/07/16
Posts: 246
Loc: sonoma
There is a way to eliminate them for sure, don't buy a di turbo.

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