The oil specification for a 2012 Honda Civic depends on the engine installed. The common 1.8-liter models use 0W-20 synthetic oil, while the Civic Si’s 2.4-liter engine uses 5W-20 synthetic oil. Always verify the exact grade for your car in the owner’s manual or on the under-hood oil fill cap.
Engine options and their oil requirements
In the 2012 Civic lineup, two engines were available in the United States: a 1.8-liter i-VTEC engine for most trims and a 2.4-liter i-VTEC engine for the high-performance Si model. Each engine has its own recommended oil viscosity.
- 1.8L i-VTEC (R18A) engine in LX/EX/EX-L: 0W-20 full-synthetic oil; API SN or newer.
- 2.4L i-VTEC (K24Z7) engine in the Civic Si: 5W-20 full-synthetic oil; API SN or newer.
In summary, 0W-20 is standard for most non-Si Civics from that year, while the Si’s 2.4L engine calls for 5W-20.
General guidelines for choosing oil
Choose a high-quality full-synthetic motor oil that meets or exceeds API SN (or newer) and ILSAC GF-5 specifications. Use the grade specified for your engine, as incorrect viscosity can affect performance and efficiency. If in doubt, check the oil fill cap or the owner's manual for the exact recommendation.
Climate and maintenance considerations
For extreme temperatures or severe driving conditions, consult the manual or a Honda service advisor to confirm if an alternative viscosity is recommended. Routine oil-change intervals for synthetic oil on a 2012 Civic are typically every 7,500 miles (12,000 km) or as indicated by the maintenance minder system.
Summary
The 2012 Honda Civic generally uses 0W-20 full-synthetic oil for the 1.8-liter engines (LX/EX/EX-L) and 5W-20 full-synthetic oil for the Civic Si’s 2.4-liter engine. Always verify the exact grade for your vehicle in the owner’s manual or on the under-hood label, and choose oil that meets API SN or newer and ILSAC GF-5 specifications.