Will the 2021 Civic Still Experience Oil Dilution?

[MargaretRose]

Now it will no longer experience oil dilution. The oil dilution issue in Civics was caused by gasoline vapor entering the crankcase and mixing with the engine oil, leading to an increase in the oil level. Below is a partial introduction to the Civic. 1. First-generation Civic: On July 11, 1972, the first-generation Civic was introduced. One of its hatchback versions featured a separately opening trunk design. The powertrain was equipped with Honda's EB series 1.2L 2-valve inline-four engine, delivering a maximum power of 60 horsepower and a maximum torque of 93 N·m, paired with a 4-speed manual transmission. 2. Second-generation Civic: In July 1979, the second-generation Civic was introduced, mainly divided into 1300 and 1500 mainline models. The powertrains were equipped with a 1.3L engine with a maximum power of 68 horsepower and a 1.5L engine with a maximum power of 80 horsepower, respectively. Both engines utilized the improved second-generation CVCC technology. 3. Third-generation Civic: On September 22, 1983, the third-generation Civic was introduced. This generation began to focus more on interior space performance, with the three-door hatchback model's wheelbase reaching 2380mm, 60mm longer than the previous five-door version. The Japanese version with a 1.3L engine had a maximum power of 80 horsepower, while the European version had a maximum power of 71 horsepower. The 1.5L versions had maximum powers of 100 horsepower and 86 horsepower, respectively.

[McJulia]

I've repaired quite a few Honda vehicles. The 2021 Civic's engine has been redesigned, with upgrades to both the fuel injection strategy and crankcase ventilation. The previous issue of oil dilution with gasoline has been largely resolved. Among the car owners I've serviced, nine out of ten no longer report this problem. The remaining cases mostly occur in extremely cold regions and involve only minor oil level increases. I recommend paying attention to three things: avoid aggressive throttle input during cold starts, especially in winter—let the engine warm up for half a minute first; during maintenance, ensure the oil is filled to 3mm below the upper limit for optimal safety; check the dipstick every 2,000 kilometers—visit a dealership immediately to read trouble codes if any abnormality is detected. The manufacturer's warranty policy now covers this issue, making warranty claims straightforward if problems do arise.

[McCamila]

I've been driving my 2021 Civic for almost two years now, covering 30,000 kilometers across various road conditions. When I first got the car, I was constantly worried about oil issues and would watch the technician measure the dipstick during every maintenance check. Later, I realized I was worrying for nothing - the oil level has remained steadily at the midpoint every time I check it. Among the 200+ owners in our same-model chat group, only one guy from Northeast China mentioned a slight oil level increase last winter, which was resolved after an ECU update at the dealership. My daily driving tip is to avoid frequent short-distance trips - I make sure to drive on the highway for half an hour weekly to let the engine fully warm up. This generation has indeed seen many improvements, and at least for long-term use, it's been quite worry-free for me.

[FinnAnn]

Since 2019, Honda has equipped the Civic with a third-generation 1.5T engine, with key upgrades to the fuel injection system and temperature control module. Tests show that the new model can effectively prevent gasoline from mixing with engine oil at -20°C. We tested ten 2021 Civics after 20,000 kilometers, and the oil dilution rate was controlled within 0.5%, far below the industry hazard standard. However, three high-risk scenarios should be noted: frequent short trips under 5 kilometers in extremely cold regions; long-term use of low-quality gasoline; and exceeding 5,000 kilometers without an oil change. Owners meeting these conditions are advised to shorten their maintenance intervals.