The truth about gasoline direct injection | How to care for your GDI engine

Gasoline Direct Injection (GDI) has been celebrated as a grand achievement by automakers. It’s the latest fuel delivery technology and industry titans tout its better performance and better fuel economy.

It’s not just all industry hype either. GDI engines have produced some impressive results.

One example of GDI success is in the Mazda 3. When Consumer Reports tested its new Skyactiv engine, the gas mileage jumped from 28 mpg to 32 mpg. Cadillac was able to add 34 horsepower to its CTS without sacrificing fuel economy.

Gasoline direct injection has crept into the mainstream and is now seen in more cars than ever. Automakers are convinced–GDI works and it is efficient.

However, that added efficiency comes at a cost. Let’s explore.

What is Gasoline Direct Injection and how does it work?

Gasoline direct injection engines work by injecting fuel at high pressure directly into the combustion chamber. This is far more precise than older fuel-injection systems or carburetors.

This direct injection results in a more complete combustion and cooler temperatures inside the cylinder. The cooler temperatures allow for a better compression ratio, meaning greater efficiency and power with the same amount of fuel.

Some manufacturers suggest that GDI engines can achieve a 50% increase in low-end torque while also returning a 15% increase in fuel economy.

This might all sound too good to be true. And in a way it is. While the efficiency gains are without a doubt real, GDI technology creates a whole new set of problems.

GDI problems

The main advantage of Gasoline Direct Injection technology, its precision, is also its main drawback.

Many people have complained to the National Highway Traffic Safety Administration that their GDI-powered cars experience high rates of fuel system clogging and engine carbon buildup.

The results can be drastic, with some drivers experiencing loss of power and engine stalling. As anyone who has needed engine repair done can tell you, these are not cheap repairs.

How to solve GDI problems

Many of the automakers who have employed this technology have stepped up to the plate to try and fix it.

BMW and Kia specifically have issued technical service bulletins to their dealerships urging them to recommend ethanol-free gasoline brands and gasoline with detergents. They have also recommended owners occasionally add a fuel-system cleaner to their vehicle.

Some other automakers have tried some engineering fixes. One example is a modification to the engine that allows it to spray a little fuel onto the valves themselves to act as a solvent and keep them clean.

Still, the best way to keep your GDI engine running cleanly and properly is to practice proper maintenance.

StrutDaddy’s specialty GDI care

While Gasoline Direct Injection technology might be relatively new, it’s old hat for us. StrutDaddy’s ASE Certified technicians are required to stay up-to-date on all the latest automotive technology.

As more and more GDI-based cars started rolling into our shops, we understood the need for specialized care. That’s why we offer service and maintenance specifically for GDI engines.

Our mechanics are experts at caring for Gasoline Direct Injection systems. Whether it’s repairs or routine maintenance, we ensure the highest-quality service for your GDI car.

Don’t trust your GDI engine to just anyone! “Fix it once, fix it right” at StrutDaddy’s! Use our online form or give us a call at (336) 599-4911 to schedule your next service!

Written by Strut Daddy's

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