The 2008 Honda Civic generally uses 5W-20 engine oil (synthetic-blend or full synthetic).
This article explains how that requirement applies to the two common engine options for the 2008 model year, the recommended oil specs, and routine maintenance guidance with practical tips for different climates and driving conditions.
Engine options and oil basics
The 2008 Civic lineup includes two gasoline engines: the 1.8-liter i4 found in LX, EX and EX-L models, and the 2.0-liter i4 in the high-performance Civic Si. In most cases both engines use 5W-20 oil, though you should confirm the exact grade from the owner's manual or the under-hood label at the time of service.
1.8-liter engine (LX, EX, EX-L)
Oil characteristics for the 1.8L engine are generally the same family-wide: viscosity of 5W-20, designed to meet ILSAC GF-5 and API SN (or higher) standards. You can choose conventional, synthetic-blend, or full synthetic oil, with many motorists favoring synthetic blends for a balance of cost and protection.
Key characteristics for the 1.8L engine oil are:
- Viscosity: 5W-20
- Specification: ILSAC GF-5 and API SN (or higher)
- Oil type: conventional, synthetic-blend, or full synthetic (Honda-recommended options include Honda or equivalent brands)
In practice, use 5W-20 and ensure you meet the above specs; if you opt for synthetic, ensure the additive package is appropriate for your climate and driving style.
2.0-liter engine (Civic Si)
The 2.0L Si engine also uses a 5W-20 viscosity as a baseline, with the same API/ILSAC standards. Because the Si is a higher-performance engine, many owners prefer full synthetic or a synthetic-blend oil with good high-temperature stability and protection under spirited driving.
Key characteristics for the 2.0L engine oil are:
- Viscosity: 5W-20
- Specification: ILSAC GF-5 and API SN (or higher)
- Oil type: conventional, synthetic-blend, or full synthetic; full synthetic is common for Si
As with the 1.8L, confirm exact grade with the manual and inspect the under-hood label if the vehicle is used in extreme temperatures or performance-driven conditions.
Oil capacity and change intervals
Oil capacity and maintenance intervals vary by engine, but the two engines share similar service expectations. Use the following as a general guide and always refer to the owner's manual for the precise figures.
- Typical oil capacity (with filter): roughly 4 quarts, varying by engine and whether a filter is replaced
- Change interval for conventional oil: about every 3,000–5,000 miles, commonly recommended at 5,000 miles
- Change interval for synthetic oil: about every 7,500–10,000 miles, depending on driving conditions and oil type
Always respect the vehicle’s maintenance schedule; severe driving conditions can shorten intervals, and the owner’s manual provides the official guidance.
Summary
For a typical 2008 Honda Civic, use 5W-20 engine oil in the LX/EX/EX-L (1.8L) and Si (2.0L) variants, with conventional, synthetic-blend, or full synthetic options that meet ILSAC GF-5/API SN. Verify exact grade and capacity in the owner's manual, and follow recommended change intervals based on oil type and driving conditions. If in doubt, consult a Honda service advisor or the dealership to confirm the correct specification for your specific car.