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New Vehicle with DI - Any Tips? #4688432
03/08/18 09:04 AM
03/08/18 09:04 AM
Joined: Dec 2007
Posts: 566
Madison, Wisconsin
TWG1572 Offline OP
TWG1572  Offline OP
Joined: Dec 2007
Posts: 566
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.

Last edited by TWG1572; 03/08/18 09:09 AM.
Re: New Vehicle with DI - Any Tips? [Re: TWG1572] #4688440
03/08/18 09:14 AM
03/08/18 09:14 AM
Joined: Dec 2014
Posts: 192
USA
dbias Offline
dbias  Offline
Joined: Dec 2014
Posts: 192
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
Re: New Vehicle with DI - Any Tips? [Re: TWG1572] #4688450
03/08/18 09:23 AM
03/08/18 09:23 AM
Joined: Jan 2017
Posts: 278
Iowa
Iowegian Offline
Iowegian  Offline
Joined: Jan 2017
Posts: 278
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
2009 Sienna, 3.5l
Re: New Vehicle with DI - Any Tips? [Re: TWG1572] #4688461
03/08/18 09:48 AM
03/08/18 09:48 AM
Joined: Mar 2016
Posts: 951
PA,US
HemiHawk Offline
HemiHawk  Offline
Joined: Mar 2016
Posts: 951
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.


2016 Nissan Frontier Pro4x
2017 VW GTI sport
1995 Mustang GTS
Re: New Vehicle with DI - Any Tips? [Re: TWG1572] #4688462
03/08/18 09:50 AM
03/08/18 09:50 AM
Joined: Oct 2010
Posts: 1,782
.
Danh Offline
Danh  Offline
Joined: Oct 2010
Posts: 1,782
.
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.

Re: New Vehicle with DI - Any Tips? [Re: HemiHawk] #4688465
03/08/18 09:53 AM
03/08/18 09:53 AM
Joined: Dec 2007
Posts: 566
Madison, Wisconsin
TWG1572 Offline OP
TWG1572  Offline OP
Joined: Dec 2007
Posts: 566
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]


Last edited by JHZR2; 03/09/18 01:35 AM. Reason: fixed long link
Re: New Vehicle with DI - Any Tips? [Re: TWG1572] #4688471
03/08/18 09:57 AM
03/08/18 09:57 AM
Joined: Dec 2003
Posts: 9,805
Florida, Cape Coral
Eddie Offline
Eddie  Offline
Joined: Dec 2003
Posts: 9,805
Florida, Cape Coral
Enjoy your new ride and don't manufacture possible problems by over thinking. Ed


CX5 Touring 2.5L :-)
Re: New Vehicle with DI - Any Tips? [Re: Eddie] #4688482
03/08/18 10:07 AM
03/08/18 10:07 AM
Joined: Dec 2007
Posts: 566
Madison, Wisconsin
TWG1572 Offline OP
TWG1572  Offline OP
Joined: Dec 2007
Posts: 566
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

Re: New Vehicle with DI - Any Tips? [Re: Danh] #4688490
03/08/18 10:12 AM
03/08/18 10:12 AM
Joined: Dec 2007
Posts: 566
Madison, Wisconsin
TWG1572 Offline OP
TWG1572  Offline OP
Joined: Dec 2007
Posts: 566
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"

Last edited by TWG1572; 03/08/18 10:13 AM.
Re: New Vehicle with DI - Any Tips? [Re: TWG1572] #4688494
03/08/18 10:13 AM
03/08/18 10:13 AM
Joined: Sep 2014
Posts: 1,446
Toronto Canada
WobblyElvis Offline
WobblyElvis  Offline
Joined: Sep 2014
Posts: 1,446
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.

Re: New Vehicle with DI - Any Tips? [Re: Eddie] #4688543
03/08/18 10:58 AM
03/08/18 10:58 AM
Joined: Jul 2002
Posts: 4,400
KY
MCompact Offline
MCompact  Offline
Joined: Jul 2002
Posts: 4,400
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

Wife's:
2009 Cooper Clubman

Son's
2009 328i

Buy what makes you smile...
Re: New Vehicle with DI - Any Tips? [Re: TWG1572] #4688571
03/08/18 11:20 AM
03/08/18 11:20 AM
Joined: Oct 2010
Posts: 1,782
.
Danh Offline
Danh  Offline
Joined: Oct 2010
Posts: 1,782
.
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.

Re: New Vehicle with DI - Any Tips? [Re: TWG1572] #4688593
03/08/18 11:44 AM
03/08/18 11:44 AM
Joined: Aug 2017
Posts: 538
Nebraska
BJD78 Offline
BJD78  Offline
Joined: Aug 2017
Posts: 538
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.
Re: New Vehicle with DI - Any Tips? [Re: TWG1572] #4688602
03/08/18 11:57 AM
03/08/18 11:57 AM
Joined: Jun 2009
Posts: 1,815
Wisconsin
wallyuwl Offline
wallyuwl  Offline
Joined: Jun 2009
Posts: 1,815
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.

Re: New Vehicle with DI - Any Tips? [Re: Eddie] #4688606
03/08/18 12:02 PM
03/08/18 12:02 PM
Joined: May 2015
Posts: 1,992
America
Alfred_B Offline
Alfred_B  Offline
Joined: May 2015
Posts: 1,992
America
Originally Posted By: Eddie
Enjoy your new ride and don't manufacture possible problems by over thinking. Ed


+1

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