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#4808222 - 07/08/18 09:44 AM Direct injection
mx5miata Offline


Registered: 03/28/10
Posts: 547
Loc: NY
This Direct injection has to be put to an end. I read horror stories on here about it I'm sick of black gaseous smelling oil in a months time. No matter if it's Mobil 1, Castrol or cheap stuff. I'm tired of more frequent oil changes and wasting money.

My wife's Corolla with port injection oil still has a honey appearance and not stinking badly of fuel in 4-6 months time she will be getting 10k or 1 year oil change
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#4808227 - 07/08/18 09:51 AM Re: Direct injection [Re: mx5miata]
PimTac Offline


Registered: 03/04/17
Posts: 4584
Loc: Soviet State of Washington
Huh?

Iíve seen none of that in my DI engine oil. The exaggeration and dramatics is telling though.
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#4808228 - 07/08/18 09:56 AM Re: Direct injection [Re: mx5miata]
mx5miata Offline


Registered: 03/28/10
Posts: 547
Loc: NY
I have a 2016 Scion iA has a Mazda mill under the hood with direct injection.. it's no exaggeration I had many cars done many of oil changes this car being the worst.

Luckily it's a lease has 6 months to go. I'm shopping around for a vehicle without the direct injection because I'm not leasing any longer.
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#4808230 - 07/08/18 10:01 AM Re: Direct injection [Re: mx5miata]
Astro14 Offline


Registered: 10/10/10
Posts: 8596
Loc: Virginia Beach
DI is more fuel efficient, so I wouldn't hold your breath... You're expecting oil durability to come in above fuel economy.
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#4808232 - 07/08/18 10:08 AM Re: Direct injection [Re: mx5miata]
slacktide_bitog Offline


Registered: 03/20/08
Posts: 6342
Loc: USA
The worst is TGDI and 0w20 puke

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#4808233 - 07/08/18 10:10 AM Re: Direct injection [Re: mx5miata]
Mainia Offline


Registered: 04/06/15
Posts: 227
Loc: Upper midwest
Have we not seen on this site that most people can easily get 8,000 miles with fuel dilution with no noticeable addition of engine wear?

I have a new 2018 Hyundai Kona AWD Turbo so all bets are off since I always have my foot into it


Edited by Mainia (07/08/18 10:10 AM)

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#4808235 - 07/08/18 10:12 AM Re: Direct injection [Re: Astro14]
mx5miata Offline


Registered: 03/28/10
Posts: 547
Loc: NY
Originally Posted By: Astro14
DI is more fuel efficient, so I wouldn't hold your breath... You're expecting oil durability to come in above fuel economy.


Direct injection more fuel efficient at the expense of shortened oil change intervals and a maintenance plan of direct injection cleaning.

For a long term ownership of the vehicle I'd take the port injection.
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#4808236 - 07/08/18 10:13 AM Re: Direct injection [Re: slacktide_bitog]
Bjornviken Offline


Registered: 12/06/17
Posts: 260
Loc: Finland
+1

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#4808237 - 07/08/18 10:13 AM Re: Direct injection [Re: mx5miata]
turnbowm Online   content


Registered: 05/14/15
Posts: 184
Loc: So. Calif.
Originally Posted By: mx5miata
This Direct injection has to be put to an end. I read horror stories on here about it I'm sick of black gaseous smelling oil in a months time. No matter if it's Mobil 1, Castrol or cheap stuff. I'm tired of more frequent oil changes and wasting money.

My wife's Corolla with port injection oil still has a honey appearance and not stinking badly of fuel in 4-6 months time she will be getting 10k or 1 year oil change


What make of car are you talking about? FWIW, I have a GDI (non-Turbo) engine and there is no smell of gas in the oil, even with 7Kmi/1yr OCIs.
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#4808239 - 07/08/18 10:14 AM Re: Direct injection [Re: mx5miata]
Astro14 Offline


Registered: 10/10/10
Posts: 8596
Loc: Virginia Beach
Originally Posted By: mx5miata
Originally Posted By: Astro14
DI is more fuel efficient, so I wouldn't hold your breath... You're expecting oil durability to come in above fuel economy.


Direct injection more fuel efficient at the expense of shortened oil change intervals and a maintenance plan of direct injection cleaning.

For a long term ownership of the vehicle I'd take the port injection.


I would too.

But you're expecting manufacturers to do that?

Good luck...
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#4808245 - 07/08/18 10:22 AM Re: Direct injection [Re: mx5miata]
cb_13 Offline


Registered: 07/24/11
Posts: 930
Loc: Missouri
I can change the oil on my truck for $20. It takes $80 to fill the fuel tank. Iíll change my oil sooner to gain a few miles per gallon.

Of course it really doesnít matter in my case because I never went over 5k mile intervals on port injected trucks either.


Edited by cb_13 (07/08/18 10:23 AM)
Edit Reason: Autocorrect

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#4808252 - 07/08/18 10:36 AM Re: Direct injection [Re: Astro14]
John_K Offline


Registered: 12/08/06
Posts: 2724
Loc: Columbus, Ohio
Originally Posted By: Astro14
DI is more fuel efficient, so I wouldn't hold your breath... You're expecting oil durability to come in above fuel economy.


Did you ever see this ad:

The new BFD Crossover...now with 8000 mile OCI!

Of course not.
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#4808253 - 07/08/18 10:37 AM Re: Direct injection [Re: mx5miata]
Lolvoguy Offline


Registered: 02/06/14
Posts: 2393
Loc: Canada
OP, how often do you drive on the highway/get to sustained higher RPM's?
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#4808258 - 07/08/18 10:51 AM Re: Direct injection [Re: mx5miata]
UncleDave Offline


Registered: 06/02/14
Posts: 1703
Loc: Ca.
Di systems have evolved and not all are equal to begin with.

The valve cleaning issue is solved by altering placements of the injector so that it can clean the valves, as well as multi-hole injectors that can direct in a variety of patterns compensating for the off-center placement of the injector.

There is no injector cleaning interval I can find.

my 3.5 honda DI mill can allow up 10K on an OCI on dino with a 5.7-quart sump using temp analysis to determine the lifespan of oil. I don't go that far, but that hardly a short OCI.

UD
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#4808263 - 07/08/18 10:58 AM Re: Direct injection [Re: mx5miata]
demarpaint Offline


Registered: 07/03/05
Posts: 29976
Loc: NY
popcorn2 I hear it's getting better.
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