Quick answer
Costs vary by region, engine type, and severity: from around £20/$30 for DIY solutions to £200/$300+ for thorough professional services. Typically, the heavier the buildup, the higher the price.
Detailed answer
Carbon cleaning doesn’t follow a strict price tag because so many variables play into it. If you just want a mild preventive approach, a fuel additive might be all you need, costing only a fraction of professional rates. Meanwhile, if your engine misfires, has rough idle, or is down on power, you may need a deeper cleaning or mechanical scrubbing (like walnut blasting), driving up the expense. Additionally, labour costs fluctuate significantly depending on your location and the complexity of accessing the carbon-laden parts. Some shops bundle carbon cleaning with general tune-ups or intake manifold removals, so you might find package deals or discounts. Asking for estimates from multiple mechanics helps ensure you get a fair price. Ultimately, the cost can be justified if it saves you from bigger repairs later or improves performance and fuel economy enough to offset the expense over time.
