Running the 5.0.

[GRIFF]

It seems as though with the 5.0 GDI engine, one must run it up a bit on a regular basis to properly maintain the engine. I have a 2012 5.0 and after a bit of slow driving back and forth to work, some hard acceleration produces a smoky exhaust for a short time. The longer between run-ups, the more exhaust discharge is noticed. A longer up speed highway drive also seems to clear things out.

Not a problem for me and the car has been perfect so far - 3,600 miles. Car completed in July of 2012 and I purchased it in March 2013 as the last chance to get the 5.0 in a sedan as I preferred the softer ride but larger engine.

I would almost expect this with the 5.0 GDI, but am curious as to the what and why this happens.

Any thoughts welcome.

Griff

 

[DominicJE]

It happens in my 3.8 all the time too when I press the pedal hard. I'm assuming it's because of the GDI engine.

 

[EXBMWGUY]

It's the DI. I did a nearly 4,000 mile road trip at a steady 75-80 mph last year. Five miles before getting home, did a WOT to get a tail-gater out of my trunk, and I think his white car was black from the crap coming out of my exhaust. So you definitely have to drive it really hard once in a while to blow out the black stuff. At highway or freeway speeds, these engines are almost comatose.

 

[GRIFF]

I would be interested as to why this build up accumulates and of course why the black carbon discharge around the exhaust. I believe the GDI combustion has something to do with it, but I would think the combustion process might be cleaner and more complete with the precisely injected amount o fuel into cylinder at the precise moment just before combustion.

I appears to be carbon which can be the result of a too rich combustion processs, but I think there is something else going on with the GDI engine which I do not understand.

Griff

 

[DRS]

They run these too rich in most all software mappings. Imagine the better gas mileage, less oil contamination, of they spent more time with the programming. They took an easy way out and have not spent the time to fix it. The 2013s do the same, I bet the 2014 do also.

Congrats on the 5.0. Not many of those made in non R-Spec. It is what I have. From March at purchase new to now, have 20k+ business miles. Experience the same thing... As said above, Comatose while cruising on highway, and in town same result of the need to WOT once a tank at least.

 

[Rey]

I had a 2012 5.0 which used about a qt. of oil/2200mi. Drove it 40K miles before trading for a 2013 3.8, whose oil usage is zip.
Both have direct injection, so I don't think that direct injection is the cause of 5.0's oil consumption (exhaust smoke). I think the piston rings on the 5.0 are not sealing well. I did note that oil consumption decreased on long trips, which indicates possibility of the rings resealing.
My guess is that the oil consumption is not enough to be actionable under warranty. Usually, mfgs like to see oil consumption well under qt./1000 mi.
I dismounted the throttle body to check oil accumulation from blowby in the intake manifold. This is very easy to do - four 10mm bolts. Found about 1/4 cup of oil in the intake manifold. You "might" get warranty relief (new motor?) for this problem by asking your dealer to verify excessive oil blowby by inspecting inside of intake manifold - it should be dry.
I "fixed" the oil blowby problem by mounting an oil accumulator (sic) in the vent line from the valve cover to the intake manifold.

 

[drpearso]

It's the DI. I did a nearly 4,000 mile road trip at a steady 75-80 mph last year. Five miles before getting home, did a WOT to get a tail-gater out of my trunk, and I think his white car was black from the crap coming out of my exhaust. So you definitely have to drive it really hard once in a while to blow out the black stuff. At highway or freeway speeds, these engines are almost comatose.

I sure do not have to worry about not blowing - stretching the engine out. These nice 5.0's like to be exercised. Regards.

 

[DRS]

What comes out of the tail pipes is not oil. Period. At least on mine.

 

[GRIFF]

I'm buying the rich setting controlled by the mapping. I guess they figure better to be safe than running to lean.

Not a drop of oil has been consumed by my 5.0 and the black discharge is carbon - I believe.

Interesting to note the break in period instructions to keep the rpm's between 2,000and 4,000 for the first 500 miles. This engine seems to like to rev, but doesn't get much of a chance with the 8 speed transmission unless you work it a bit.

GRIFF

 

[DRS]

Agreed.

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[Delmustator]

This is an issue with all the Hyundai's. My 2012 SE Turbo was notorious for making the exhaust tips soot black all the time. Open it up and you could see the cloud of black smoke from the excessive fuel mixture burning. The only way to fix this is to have the car dyno tuned and the ECM flashed by the tuner (if they can do it). Otherwise, you take it in for service and they could re-flash the ECM thinking something is amiss. Loosing your tune in the process. I would suspect that the 5.0 would get some better fuel economy numbers if they leaned it out a little. You could probably get some leaner mixtures with an aftermarket (free flow) intake and exhaust as well. A dyno tune and re-flash is cheaper.

 

[peterbhere]

According to Wikipedia:

In 2013, a research by TÜV NORD found that although gasoline direct injection engines dramatically reduce CO2 emissions, they release about 1,000 times more particles classified by the World Health Organization as harmful than traditional petrol engines and 10 times more than new diesel engines. The release happens because direct injection results in uneven burning of fuel due to uneven mixing of fuel and air (stratification)and because direct injection engines operate with a higher pressure in their cylinders than the older engines. This pollution can be prevented with a relatively inexpensive filter that can significantly reduce the emissions of particles. However, fitting the filter is not mandatory yet

 

[DRS]

So, the stratified head design causes CO2 to be turned straight Into carbon. And mucking up the back end of our cars. Thanks jack boot .gov tyrants. They control our bodies totally because they say as hand we produce quantity of what they say are two "pollutants". Pollutants that cause massive "climate change" (bull Shft)...

So your very body is OWNED by the EPA.. Why? You emit CO2 and methane in massive quarantines. You may have a temporary revokable exemption from regulation and control of your body and emissions.

Ok, back to the post above. THANK YOU for explaining that. Makes sense. And makes sense for the stupidity and expense to eliminate a non pollutant CO2.

Oh on a side note.. Speaking of CO2. How are all those morons on a tax payer paid vacation to summer time Antarctica doing? Frozen in massive ice that was supposed never to come back because of "climate change".. How much CO2 and methane did they produce with all the rescue ships and their own ship?

Why is the rant above important? In 10 years, 54 mpg is required across the board for cars. Our TAU 5.0, and all V8 and V6 will be on ash heap of history. Car engineers will have to use up MORE gas to cull false CO2 problem, spewing out carbon particles wasting gas, AND at the same time meet the 54mpg Obama/Bush NWO standards.. Ready for your peddle powered Genny? Certainly the music of the V8 will be as illegal as the incandescent light bulb in the near future.

 

[gameday22]

I had a 2012 5.0 which used about a qt. of oil/2200mi. Drove it 40K miles before trading for a 2013 3.8, whose oil usage is zip.
Both have direct injection, so I don't think that direct injection is the cause of 5.0's oil consumption (exhaust smoke). I think the piston rings on the 5.0 are not sealing well. I did note that oil consumption decreased on long trips, which indicates possibility of the rings resealing.
My guess is that the oil consumption is not enough to be actionable under warranty. Usually, mfgs like to see oil consumption well under qt./1000 mi.
I dismounted the throttle body to check oil accumulation from blowby in the intake manifold. This is very easy to do - four 10mm bolts. Found about 1/4 cup of oil in the intake manifold. You "might" get warranty relief (new motor?) for this problem by asking your dealer to verify excessive oil blowby by inspecting inside of intake manifold - it should be dry.
I "fixed" the oil blowby problem by mounting an oil accumulator (sic) in the vent line from the valve cover to the intake manifold.

My 3.8 Genny is less than a month old, had the oil changed at 1800 miles just to get all the junk from the initial break-in flushed out of the system. I switched over to Synthetic like I always do with all my vehicles and when the Tech did the change he said did you know you were down almost a full quart of oil??

My 2010 3.8 didn't burn a drop so it's very concerning to me to see that much gone with <2k miles. That's telling me that if I went the full 5k between changes like the technician put on my next change sticker I'd potentially be down 2 quarts or more ?? ...horrible if that's the case.

 

[shagnat]

I give my 4.6L an Italian tuneup about once a month 'coz most of my driving is putting around through a subdivision to a 4 mile immense retail zone with stop lights every half block and bumper to bumper traffic.