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#4688432 - 03/08/18 08:04 AM New Vehicle with DI - Any Tips?
TWG1572 Offline


Registered: 12/18/07
Posts: 558
Loc: Madison, Wisconsin
I retired my trusty Nissan Frontier earlier this year for a '17 Nissan Titan with the 5.6 gas engine. This is my first experience with a DI engine, so I'm looking for any advice people might have. It specs 0w20 oil, but I could have sworn I read somewhere in the manual where 5w30 was "acceptable".

I ran my Frontier 200K miles on 7.5K OCIs with PP. It worked well based on the UOA's I had, but....the Titan has a 100,000 mile warranty, and a 5K specified OCI. I'm going to follow that OCI just to make sure I'm covered from a warranty perspective. At this point, I was just planning on buying whatever 0w20 was on sale and rolling with it. I'd assume with the 5K interval, that synthetic blends would be fine if I can't score a rebate on full synthetic? I've taken advantage of the Mobil 1 rebates to pick up my first oil change, so I'm set there.

I buy Top Tier fuel pretty much exclusively. Kwik Trip, Costco, and Cenex primarily.

I'd considered running Techron in advance of every OCI, just to try and keep the valves cleaned up. Any thoughts on that?

Any other general advice to avoid any DI associated problems? Tips? Things to watch for? I really like the truck so far, hoping to keep it to 200K like the Frontier if all goes well.


Edited by TWG1572 (03/08/18 08:09 AM)

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#4688440 - 03/08/18 08:14 AM Re: New Vehicle with DI - Any Tips? [Re: TWG1572]
dbias Offline


Registered: 12/24/14
Posts: 136
Loc: USA
Only advantage techron will give you is maintaining a proper spray pattern from your injectors to keep the fuel burning clean. Almost none of it, if any will ever see the back of a valve. Using low noack oil may help and avoiding short trips are just about all you can do. Deposits will form no matter what but many say a half hour or so once a week at 3k+ rpm will help cook a lot of it off
_________________________
2011 VW JETTA Castrol Edge 0W-40
2012 FORD TRANSIT CONNECT Castrol Edge 5W-20
2016 HONDA CIVIC COUPE Castrol Edge 0W-20
2017 AUDI A4 Ravenol SSL 0W-40

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#4688450 - 03/08/18 08:23 AM Re: New Vehicle with DI - Any Tips? [Re: TWG1572]
Iowegian Offline


Registered: 01/05/17
Posts: 273
Loc: Iowa
Keep an eye on the oil dipstick.
Definitely keep the OCI down to 5k miles...even after warranty is up.
See if you can put a catch can on it...check with the dealer about any warranty issues over the catch can.

Check to see how easy it is to remove the intake manifold to clean the intake valves.
You should not have to worry about cleaning (manually) the intake valves for at least 30k or 40k miles.
Oil consumption, if it ever happens, probably won't start for another few thousand miles and can start at anytime after that.
_________________________
2011 Equinox, 2.4l
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#4688461 - 03/08/18 08:48 AM Re: New Vehicle with DI - Any Tips? [Re: TWG1572]
HemiHawk Offline


Registered: 03/09/16
Posts: 842
Loc: PA,US
7.5k changes for the Frontier? Hmm I've been doing 5k. Would love to see some of your UOAs!

For the DI, like others have said regular oil changes, and if possible a catch can. Catch can won't prevent the problem entirely, but should certainly help. From my research it also seems that DI engines that are "run" on an a regular basis fair better. By "run" I mean pushed a bit. It may be tough to stress a 5.6L without towing or hauling something, but some nice on-ramp runs after is warmed up may help.

The manual for my GTI actually states to run the car on the highway in a lower gear at higher RPM every so many miles or months. I don't do that as it seems like extra wear on other components. But I get the motor going on occasion.
_________________________
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#4688462 - 03/08/18 08:50 AM Re: New Vehicle with DI - Any Tips? [Re: TWG1572]
Danh Offline


Registered: 10/16/10
Posts: 1750
Loc: .
There are DI engines and there are DI engines. Some are problems, some are not. Donít know where your Nissan V8 sits on that spectrum (I know where Honda does, but thatís another story).

The two issues you are likely aware of are intake valve deposits and fuel dilution.

The intake valve deposit issue is generally overblown in my opinion, and is based on the experience of early adopters a decade ago. You just donít hear many current reports of intake valve issues as OEMs have addressed the problem in several ways. And Iím dubious about the value of a catch-can: a lot of OEMs have designed a catch-can like separator into the engine design. At least see if you Nissan has such a device before adding one.

Fuel dilution is surely a problem with some DI engines. Keep an eye on the dipstick, especially for increasing sump levels. After break-in have a UOA performed by a lab that uses gas chromotography, like Polaris. If dilution isnít an issue go with the recommended fuel and OCI requirements. If it is an issue, shorten the OCI and/or go to 93/91octane fuel if that isnít already required.

Use a high-quality synthetic in the highest recommended viscosity and top-tier fuel. And a periodic Techron treatment is a good idea for any vehicle.

Hope itís an uneventful ownership experience.

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#4688465 - 03/08/18 08:53 AM Re: New Vehicle with DI - Any Tips? [Re: HemiHawk]
TWG1572 Offline


Registered: 12/18/07
Posts: 558
Loc: Madison, Wisconsin
Originally Posted By: HemiHawk
7.5k changes for the Frontier? Hmm I've been doing 5k. Would love to see some of your UOAs!



Here's my last UOA thread.

[url=
https://www.bobistheoilguy.com/forums/ubbthreads.php/topics/4461490/Re:_2008_Nissan_Frontier,_PP_5#Post4461490]Link[/url]



Edited by JHZR2 (03/09/18 12:35 AM)
Edit Reason: fixed long link

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#4688471 - 03/08/18 08:57 AM Re: New Vehicle with DI - Any Tips? [Re: TWG1572]
Eddie Online   sleepy


Registered: 12/07/03
Posts: 9569
Loc: Florida, Cape Coral
Enjoy your new ride and don't manufacture possible problems by over thinking. Ed
_________________________
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#4688482 - 03/08/18 09:07 AM Re: New Vehicle with DI - Any Tips? [Re: Eddie]
TWG1572 Offline


Registered: 12/18/07
Posts: 558
Loc: Madison, Wisconsin
Originally Posted By: Eddie
Enjoy your new ride and don't manufacture possible problems by over thinking. Ed


Thanks! And I think that's great advice. smile

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#4688490 - 03/08/18 09:12 AM Re: New Vehicle with DI - Any Tips? [Re: Danh]
TWG1572 Offline


Registered: 12/18/07
Posts: 558
Loc: Madison, Wisconsin
Originally Posted By: Danh
If it is an issue, shorten the OCI and/or go to 93/91octane fuel if that isnít already required.


What benefits will the higher octane fuel provide? I guess what I'm really asking is how does that prevent fuel dilution?

I will say I tried a couple tanks of 93 (regular is recommended), just to see if I noticed any MPG or other differences. I THINK (and this is subjective butt dyno speak here) that the 7 speed transmission seems to be making better choices for gears with the higher octane. Again, all this is subjective but it just feels crisper to drive. There's been less "wow, it feels like it shifted up too early"


Edited by TWG1572 (03/08/18 09:13 AM)

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#4688494 - 03/08/18 09:13 AM Re: New Vehicle with DI - Any Tips? [Re: TWG1572]
WobblyElvis Offline


Registered: 09/23/14
Posts: 1345
Loc: Toronto Canada
Originally Posted By: TWG1572
Originally Posted By: Eddie
Enjoy your new ride and don't manufacture possible problems by over thinking. Ed


Thanks! And I think that's great advice. smile


I also agree with Eddie. I have never seen a problem with a DI engine.

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#4688543 - 03/08/18 09:58 AM Re: New Vehicle with DI - Any Tips? [Re: Eddie]
MCompact Online   content


Registered: 07/21/02
Posts: 4114
Loc: KY
Originally Posted By: Eddie
Enjoy your new ride and don't manufacture possible problems by over thinking. Ed


Exactly! I've had 3 cars with DI motors-two of which were turbocharged-and have experienced no issues with any of them. My first, a 2007 Mazdaspeed 3 was running just fine when I traded it at 158,000 miles- and UOAs indicated that a 7k-8k OCI was conservative.
_________________________
Mine:
2014 M235i
1999 Wrangler Sahara
1995 318ti Club Sport

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2016 i3 REX
2009 Cooper Clubman

Son's
2009 328i

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#4688571 - 03/08/18 10:20 AM Re: New Vehicle with DI - Any Tips? [Re: TWG1572]
Danh Offline


Registered: 10/16/10
Posts: 1750
Loc: .
Originally Posted By: TWG1572
Originally Posted By: Danh
If it is an issue, shorten the OCI and/or go to 93/91octane fuel if that isnít already required.


What benefits will the higher octane fuel provide? I guess what I'm really asking is how does that prevent fuel dilution?

I will say I tried a couple tanks of 93 (regular is recommended), just to see if I noticed any MPG or other differences. I THINK (and this is subjective butt dyno speak here) that the 7 speed transmission seems to be making better choices for gears with the higher octane. Again, all this is subjective but it just feels crisper to drive. There's been less "wow, it feels like it shifted up too early"


It reduces fuel dilution during highway driving in my DI Honda and others here have had similar experiences. We think some DI engines now respond to spark knock by richening the fuel air mixture instead of retarding timing. With low highway revs common these days, spark knock may be common. So, less richening, less fuel dilution. But ymmv.

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#4688593 - 03/08/18 10:44 AM Re: New Vehicle with DI - Any Tips? [Re: TWG1572]
BJD78 Offline


Registered: 08/05/17
Posts: 493
Loc: Nebraska
Top tier fuel already has plenty of detergents in it. Not sure if adding more would really do much. I remember that was a topic on Car Talk some years ago and Tom and Ray told a caller that adding extra detergents to a gasoline that already has enough would not be of any noticeable benefit. Basically more is not always better. Before top teir gas back in the 60's and 70's my Dad liked to run a tank of premium every summer and winter through his vehicles. No proof that it helped or hurt but he swore by it.
_________________________
2010 Forester:122K
2009 Sonata :189K
2010 Tucson:55K

OCI 5K using the cheapest dino oil I can buy,usually NAPA or TSC Travelers oil.

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#4688602 - 03/08/18 10:57 AM Re: New Vehicle with DI - Any Tips? [Re: TWG1572]
wallyuwl Offline


Registered: 06/02/09
Posts: 1777
Loc: Wisconsin
My advice is to not buy a vehicle with a DI engine. It is the main reason I just bought a new F-150 instead of a new Silverado. The F150s, starting in 2018, are dual injected so you still get some fuel over the valves and the Silverado Ecotec3 engines are just DI. If you can use 5W-30 instead of 0W-20 do it. The DI will cause fuel dilution and that combined with a light weight oil won't help.

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#4688606 - 03/08/18 11:02 AM Re: New Vehicle with DI - Any Tips? [Re: Eddie]
Alfred_B Offline


Registered: 05/12/15
Posts: 1968
Loc: America
Originally Posted By: Eddie
Enjoy your new ride and don't manufacture possible problems by over thinking. Ed


+1

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