From where does the Voodoo oil consumption come from?

[Hack]

One thing that hasn't been mentioned in this thread is that Ford recommends only adding oil if the level is below the bottom marker on the dipstick. My GT350 would disappear some of the oil if it was filled to the top marker. However, it would only consume oil down to about midway between the marks on the dipstick.

If I left it alone and didn't add any oil, the engine stopped consuming oil. Once I figured that out, I never had to add oil between changes again.

So my question to the OP is whether you wait to add oil until the level is below the bottom marker on the dipstick? If not, I suggest you try it.

One other thing - if you don't have obvious leaks, the engine is probably burning the oil vapors. It doesn't take much oil per combustion cycle to add up to a quart between changes.

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[sk47]

I'm just wondering if there are any negativ side effects of continued operation with that kind of oil consumption

Where the oil goes is the biggest mystery in my life

if you don't have obvious leaks, the engine is probably burning the oil vapors.

Hello; As to where the oil is going, Hack has the right idea I think. Oil burns in the combustion chamber along with the fuel. A few years ago Ferrari ad it's f1 cars using a lot of oil during a race. If memory serves they had to fix that as it was deemed an advantage in terms of extra energy.

As to negative side effects I suspect a few. Cost for one thing of course. While oil does burn, I do not think it burns cleanly like gasoline. I imagine the exhaust valves and even the top of a piston might wind up with hard carbon deposits. Such carbon deposits on a piston can become a "hot" spot retaining enough heat to trigger pre-ignition (knock)(detonation).
The rings possibly could have a build up but i am not sure about this. I have seen rings & lands with such buildup in the past in worn engines, but have not have a newer motor apart.

There are aftermarket additives which claim to remove carbon build up. Even if an engine is not an oil burner the direct injection engines no longer have raw fuel washing the back of the intake valves. The emission system (crankcase gases routed to the intake) means oil vapors wind up in the intake system.

Last thing today is the catalytic converter. I do not know of excess oil affecting a converter but my imagination goes to there. A converter is essentially a stove designed to burn any excess fuels which do not burn in the combustion chamber. They (converters) get in theory hot enough to more thoroughly burn that fuel. Not clear to me what excess oil will do.

 

[GregO]

few years ago Ferrari ad it's f1 cars using a lot of oil during a race. If memory serves they had to fix that as it was deemed an advantage in terms of extra energy.

In the two stroke racing community it’s a known fact the higher the oil mix percentage equals higher horse power. So long as the air fuel ratio is adjusted. It’s also known that the higher oil mix percentage aids in minimizing engine exhaust port carbon buildup.
I’m not surprised with F1 deeming the oil consumption as a power adder.

 

[GregO]

Last thing today is the catalytic converter. I do not know of excess oil affecting a converter but my imagination goes to there. A converter is essentially a stove designed to burn any excess fuels which do not burn in the combustion chamber. They (converters) get in theory hot enough to more thoroughly burn that fuel. Not clear to me what excess oil will do.

Modern Engine lubricating oils have been modified to decrease catalytic converter poisoning. Mostly molybdenum ppm have been lowered significantly.

 

[svttim]

While it didn't affect all cars, the worst received faulty rings from an outside supplier. I suspect that was not only the GT350 line. I had a 16 and now a 19 and neither has use any appreciable oil. Never had to add between changes although I do change oil if I track the car

 

[Evenmetal]

While it didn't affect all cars, the worst received faulty rings from an outside supplier. I suspect that was not only the GT350 line. I had a 16 and now a 19 and neither has use any appreciable oil. Never had to add between changes although I do change oil if I track the car

Was the faulty rings from an outside supplier a confirmed issue? Or is this just a theory?

 

[Mrhavasu]

I broke my car in easy, never have redlined it and it does not use
any oil. Over 7k miles now.

 

[svttim]

Was the faulty rings from an outside supplier a confirmed issue? Or is this just a theory?

Was the faulty rings from an outside supplier a confirmed issue? Or is this just a theory?

Pretty solid info out of Ford

 

[Hack]

We know 100% that Ford did change the ring design. I wouldn't call the early rings faulty, but I don't disagree at all with what Tim said. Obviously if Ford made a design change it was an improvement and Ford felt it was needed or they wouldn't have spent the money. With that said, many 2016s ended up working just fine.

 

[svttim]

We know 100% that Ford did change the ring design. I wouldn't call the early rings faulty, but I don't disagree at all with what Tim said. Obviously if Ford made a design change it was an improvement and Ford felt it was needed or they wouldn't have spent the money. With that said, many 2016s ended up working just fine.

Agreed, My 16 was fantastic

 

[Hack]

Agreed, My 16 was fantastic

As was mine.

 

[sk47]

Obviously if Ford made a design change it was an improvement and Ford felt it was needed or they wouldn't have spent the money.

Hello; any idea when the changed spec rings made it into production engines?

 

[Hack]

Hello; any idea when the changed spec rings made it into production engines?

I don't remember exactly when and it didn't pop up in a quick search. I think it might be late 2017 or early 2018, but I might be completely wrong.

 

[T7TheLama]

Reporting back after the PCV valve replacement. Topped the car off and drove to Germany and back including some high speed runs hehe. Round about 1500km (930 miles) and the car used zero oil. So i guess i found my issue. Also my front splitter flew away.

 

[wingnutt]

Well dang, from one quart per 5-600 miles to zero in 900 miles?

Did you use the UPR pcv, or something else?

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