Direct Injection Fuel

[Watchman]

Direct Injection engines should use Top Tier gasoline and as you see from the chart below not all Top Tier gas is the same. Many auto manufactures are using these engines because they deliver higher HP and are more efficient. So many people think a higher Octane is better but actually it can damage an engine that wasn't designed for higher octane. I am not an expert but I did study this subject because I have a GDI engine in one of the cars I own and read there are problems with these engines due to deposits forming on the valves and injectors.

The best way to mitigate these deposits is to spend a little more for Top Tier gas with high concentrations of detergents to keep things clean. Let's use an 18 gallon tank for example and a 3 cent per gallon price difference. We are talking 54 cents more to fill the tank. You can't buy ANY additive anywhere to clean your valves and injectors for 54 cents per tank.

There is plenty of information on the net and I suggest anyone concerned spend a little time to research what can prolong engine life of any Direct Injection engine like Mavericks 2.0 Ecoboost. I hope this helps to keep a few more Mavericks on the road for a long time.

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[Probity]

Regards DI engines, higher detergent concentration gasoline may help keep injectors cleaner but don't do squat for keeping backsides of intake valves clean (the intakes never see the gas mix in DI's).

My understanding is that the 2.0EB is not dual PFI/DI like some other Ford EB engines are, it's DI only.

 

[grumpyunk]

Problem is that the 'cleaner'(assuming that is the above image is indicating) comes nowhere near the manifold side of the intake valves. That side is where all(ok, not all) the GDI engines have deposits forming.
How does it clean anything when it is injected directly into the combustion chamber and never even passes by the intakes?
I find it hard to believe that higher octane fuel can damage an engine. The only thing higher octane fuel does is slow down the 'flame front' so that it does not collide with another front, and cause knock/ping/clatter. Higher octane fuel just burns a tad slower as I understand, and does nothing else.

 

[Darksider]

Top tier does nothing for the cleaning valves in a direct injection engine. The main reason for using direct injection is due to the turbo. With the large pressure variances the direct injection can react faster than common port injection. The direct injections has more down falls then benefits but to stay within emission this is the route that made. Those down falls are oil dilution, carbon build up on valves, expensive high psi fuel pumps.

 

[clippedwings]

And thus the oil catch can debate. Many declare it to be pointless, but my research seems to tell me that the less oil blow-by that passes over the backs of those valves, the better. It’s not a solution, but it does delay the inevitable. Anecdotal claims seem to show that a lot of people can put off cleaning those valve deposits until 70,000-100,000 miles. I will be gone long before my 2.0 hits that number of miles - or more likely it will be sold/traded at my usual 5-year cycle, so for me the oil can solution is still up for debate. But being someone who respects machinery, and always wants mine to be operating at it’s optimul;m, I’ll prolly end up installing one. The GDI design is THE major reason I hesitated before pulling the trigger on the 2.0.

 

[Watchman]

Direct Injection engines should use Top Tier gasoline and as you see from the chart below not all Top Tier gas is the same. Many auto manufactures are using these engines because they deliver higher HP and are more efficient. So many people think a higher Octane is better but actually it can damage an engine that wasn't designed for higher octane. I am not an expert but I did study this subject because I have a GDI engine in one of the cars I own and read there are problems with these engines due to deposits forming on the valves and injectors.

The best way to mitigate these deposits is to spend a little more for Top Tier gas with high concentrations of detergents to keep things clean. Let's use an 18 gallon tank for example and a 3 cent per gallon price difference. We are talking 54 cents more to fill the tank. You can't buy ANY additive anywhere to clean your valves and injectors for 54 cents per tank.

There is plenty of information on the net and I suggest anyone concerned spend a little time to research what can prolong engine life of any Direct Injection engine like Mavericks 2.0 Ecoboost. I hope this helps to keep a few more Mavericks on the road for a long time.

According to consulting engineer Jerry Horn at Chevron, these deposits are formed from a series of compounds, among them olefins and di-olefins with double-bonds that break down, forming gummy deposits that can alter airflow around intake valves or fuel flow out of injectors. Jim Macias, fuels technology manager at Shell, adds that these carbonaceous deposits start out as one of the 300 compounds in gasoline, then polymerize on hot surfaces. There’s no single component to target, which complicates preventing or cleaning them.

 

[Bushpilot]

So many people think a higher Octane is better but actually it can damage an engine that wasn't designed for higher octane.

Higher octane that what is required is arguably a waste of money, but not harmful.

 

[Brian_J]

According to consulting engineer Jerry Horn at Chevron, these deposits are formed from a series of compounds, among them olefins and di-olefins with double-bonds that break down, forming gummy deposits that can alter airflow around intake valves or fuel flow out of injectors. Jim Macias, fuels technology manager at Shell, adds that these carbonaceous deposits start out as one of the 300 compounds in gasoline, then polymerize on hot surfaces. There’s no single component to target, which complicates preventing or cleaning them.

It sounds like you are quoting an article/ paper or two. Can you link to them? I’d like to read further.

 

[jtpc2021]

Regards DI engines, higher detergent concentration gasoline may help keep injectors cleaner but don't do squat for keeping backsides of intake valves clean (the intakes never see the gas mix in DI's).

My understanding is that the 2.0EB is not dual PFI/DI like some other Ford EB engines are, it's DI only.

Exactly.

Multiport is the way to go, which is why toyota does it.
Luckily the 2.5 hybrid is multiport, so don’t have to worry about the carbon buildup issues down the road.

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