Does the 2021 Civic Hatchback 1.5L turbo still suffer from the oil dilution issue seen on earlier Civics?
The oil dilution issue on the 1.5L turbo L15B7 was most pronounced on 2016-2018 Civics. Honda progressively improved the calibration on subsequent years. On the 2021 Civic Hatchback, the engine control module software update available through the dealer network significantly mitigates the problem. For city driving in Quebec or the Prairies with frequent cold starts, it remains prudent to shorten oil change intervals to 5,000-6,000 km rather than the 8,000 km indicated by the maintenance minder.









