Have you noticed a sudden in fuel average after recent software updates o r services?

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Have you noticed a sudden in fuel average after recent software updates o r services?

Some owners report a decline in mileage after ECU updates o r dealership maintenance. Did your fuel economy change after service?

Lubaba asked on 07 Aug 2025 18:10:28 pm

1 Answer

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Car Mechanic Expert - on 07 Aug 2025 18:13:17 pm

Some users have reported a minor decline in fuel economy after ECU software updates o r dealership service, especially if the engine tuning was altered o r sensors weren’t calibrated properly. However, others have seen improvements post-service when filters and plugs were cleaned o r replaced. It varies based on service quality.