The Reason Why Short Trips Are So Hard On Turbocharged EnginesSlashGearMadeline CuccioTue, September 22, 2026 at 9:45 AM UTCAdd us on GoogleBet_noire/Getty ImagesYou know the age-old phrase, "There ain't no replacement for displacement?" Well, they're wrong — there is a replacement for displacement, and it's called a turbocharger. The principle behind these snail-looking devices is to effectively multiply the amount of air your engine is receiving. Let's say you have a 2.0-liter turbo next to a 4.0-liter naturally-aspirated engine, but the turbo is putting out 2 bar of boost. That means you're feeding the 2.0-liter engine with the same air load as a 4.0-liter engine. A big plus, right? Sure is — and turbos do indeed have many benefits. But all that comes at a cost: complexity.A turbocharger isn't a static object. It has to build up boost by spinning a turbine inside the unit, and we all know the basic rule of cars. If it's metal and it moves, it needs lubrication. Moreover, a turbocharger operates using an engine's exhaust gas, and that gas is incredibly hot. In fact, a turbocharger's turbine housing can exceed 1,500 degrees Fahrenheit when it's fully spooled up, which is why you see some footage where it's glowing red-hot.Imagine, then, that you're on a short trip. You drive along with the turbo spooled up to that temperature, then shut the car off right after without giving it any downtime. The thermal shock this creates leads to various long-term issues that degrade the turbo's performance, even damaging your engine's internals, like carbon buildup, overheated oil and oil contamination in the fuel system, boost pressure issues, and more all occur from this.AdvertisementAdvertisementRead more: What Is Hypoid Gear Oil And What Makes It Different From Regular Gear Oil?The effects of overheating a turbochargerIgors Aleksejevs/Getty ImagesFirst of all, heating up a piece of metal to 1,500 degrees Fahrenheit over and over again will eventually degrade the material. That's just heat cycles at work — it'll start to warp everything to the point where you begin to lose boost pressure from the leaks and tolerance issues, and eventually the turbo itself will fail. You'll see symptoms like discoloration of core components like the turbine and shaft, bearing housing, and other parts in contact with all that heat. This may lead to the turbine blades becoming compromised, either warping or shearing off, for example.The metallurgy is just one piece of the puzzle, though. More pertinently, oil tends to misbehave in an overheating turbocharger, and that can lead to fouling of your car's intake and combustion chamber. Because you're not pulling any of that oil away from the heat in short trips, you basically cook it inside the turbo housing and carbonize all that lubricant. This will leave carbon deposits on the inside of your turbo, which then gets sucked in and cycled through your intake. Ultimately, you'll end up with an oil-burner and get a smoky, smelly exhaust as a result, probably also clogging up your catalytic converter and popping a check-engine light.All of this gets exaggerated on shorter trips because the engine's not fully up to operating temperature and the oil might still be cold. You're not pulling any of it away from the turbo by letting it idle after it's just run hard, so the oil sits in the lines and ends up clogging everything up with burnt carbon.Doing short trips properlyWarut Wetsanarut/Getty ImagesLet's take it to the extreme and say that you're running a trip that's less than five minutes down the road, but you have to go up a hill, so the turbo's on full-blast for a relatively short duration. How do you keep it from experiencing these symptoms?AdvertisementAdvertisementThe main thing to do is to let the engine idle down for around 1-2 minutes after a hard trip like that. This also applies to long journeys where you're working a turbo engine hard, like a multi-hour stint while towing heavy cargo. Just shutting the engine off leads to the oil burning problems, so instead you have to let the engine run for a bit after you park. This keeps the oil circulating through the lines enough that you won't burn anything, and it'll help pull some of that heat away from the turbo because the engine's cooling system is running. It's as simple as that.There are several steps recommended by various places for remedial action in case this becomes a problem. It obviously depends who you ask and what car you're running, but generally you're looking at an oil system flush, new oil and air filters to get rid of the carbon buildup there, checking the coolant quality and levels, and cleaning out the fuel and exhaust system if the buildup gets severe — check your EGR if you have a diesel as well because that can brick your turbo if it gets clogged. Whatever you do, though, be sure not to repeat the offense because turbochargers are expensive.Want the latest in tech and auto trends? Subscribe to our free newsletter for the latest headlines, expert guides, and how-to tips, one email at a time. You can also add us as a preferred search source on Google.Read the original article on SlashGear.