Exact configuration / US market
1998 / MY1998 / FWD
Honda Civic CNG · Automatic 4-speed · 4 cyl · 1.6 L
MY1998 US configuration with 1.6 L, automatic 4-speed, and source-linked EPA data.
01 / Key facts
02 / Maintenance at a glance
1 maintenance guides available
Source-backed owner service for this exact configuration.
View all maintenance →Technical specifications
Facts are grouped by system. Expand any row to inspect evidence and its exact source locator.
Identity
5/10- Model year
- 1998
Verified
FuelEconomy.gov vehicle record 14089, year - Market
- United States
Verified
FuelEconomy.gov vehicle record 14089, dataset US-market scope - Body style
- Passenger car
Verified
FuelEconomy.gov vehicle record 14089, VClass - Doors
- Not recorded
- Seating capacity
- Not recorded
- Chassis / platform code
- Not recorded
- Factory grade
- Not recorded
- Manufacturer code
- Not recorded
- EPA vehicle class
- Subcompact Cars
Verified
FuelEconomy.gov vehicle record 14089, VClass - FuelEconomy.gov record
- 14089
Verified
FuelEconomy.gov vehicle record 14089, id
Powertrain
9/22- Powertrain layout
- Not recorded
- Powertrain type
- Internal combustion
Verified
FuelEconomy.gov vehicle record 14089, atvType, fuelType1, and fuelType - Engine
- Not recorded
- Engine description
- CNG
Verified
FuelEconomy.gov vehicle record 14089, eng_dscr - Engine code
- Not recorded
- Engine position
- Not recorded
- Cylinders
- 4
Verified
FuelEconomy.gov vehicle record 14089, cylinders - DisplacementExact factory displacement; replaces EPA rounded 1.6 L.
- 97 cu in
Verified
1998 Honda Civic GX Owner Manual Supplement — Specifications, pages 31–34
Printed page 31, Engine: 97.0 cu-in (1,590 cm3) - Bore
- 3 in
Verified
1998 Honda Civic GX Owner Manual Supplement — Specifications, pages 31–34
Printed page 31, Engine, Bore x Stroke - Stroke
- 3.5 in
Verified
1998 Honda Civic GX Owner Manual Supplement — Specifications, pages 31–34
Printed page 31, Engine, Bore x Stroke - Compression ratio
- 12.5:1
Verified
1998 Honda Civic GX Owner Manual Supplement — Specifications, pages 31–34
Printed page 31, Engine, Compression ratio - Valves
- Not recorded
- Induction
- Naturally aspirated
Verified
FuelEconomy.gov vehicle record 14089, tCharger, sCharger, and eng_dscr - Fuel delivery
- Not recorded
- Fuel
- CNG
Verified
FuelEconomy.gov vehicle record 14089, fuelType1 and fuelType - Alternate fuel
- Not recorded
- Stop-start system
- Not recorded
- Engine power
- Not recorded
- Power speed
- Not recorded
- Engine torque
- Not recorded
- Torque speed
- Not recorded
- Redline
- Not recorded
Transmission
5/8- Transmission
- Automatic 4-speed
Verified
FuelEconomy.gov vehicle record 14089, trany - Transmission code
- Not recorded
- Transmission type
- Automatic
Derived
FuelEconomy.gov vehicle record 14089, trany; normalized transmission type - EPA transmission descriptor
- CLKUP
Verified
FuelEconomy.gov vehicle record 14089, trans_dscr - Forward ratios / speeds
- 4
Derived
FuelEconomy.gov vehicle record 14089, trany; parsed forward-speed count - Driven wheels
- FWD
Verified
FuelEconomy.gov vehicle record 14089, drive - Differential
- Not recorded
- Transfer case
- Not recorded
Gearing
0/19- 1st gear
- Not recorded
- 2nd gear
- Not recorded
- 3rd gear
- Not recorded
- 4th gear
- Not recorded
- 5th gear
- Not recorded
- 6th gear
- Not recorded
- 7th gear
- Not recorded
- 8th gear
- Not recorded
- 9th gear
- Not recorded
- 10th gear
- Not recorded
- CVT lowest ratio
- Not recorded
- CVT highest ratio
- Not recorded
- Reverse
- Not recorded
- Final drive
- Not recorded
- Front final drive
- Not recorded
- Rear final drive
- Not recorded
- Secondary reduction
- Not recorded
- Transfer-case high range
- Not recorded
- Transfer-case low range
- Not recorded
Chassis and steering
0/7- Frame / construction
- Not recorded
- Front suspension
- Not recorded
- Rear suspension
- Not recorded
- Steering
- Not recorded
- Steering ratio
- Not recorded
- Turns lock-to-lock
- Not recorded
- Turning circle
- Not recorded
Brakes
0/6- Brake system
- Not recorded
- Front brakes
- Not recorded
- Rear brakes
- Not recorded
- Front rotor diameter
- Not recorded
- Rear rotor diameter
- Not recorded
- Anti-lock braking
- Not recorded
Wheels and tires
2/8- Wheels
- Not recorded
- Front wheel
- Not recorded
- Rear wheel
- Not recorded
- Front tire
- Original front tire: P185/65R14 85S; specified pressure 30 psi (210 kPa).
Verified
1998 Honda Civic GX Owner Manual Supplement — Specifications, pages 31–34
Printed page 32, Tires, Front/Rear size and pressure - Rear tire
- Original rear tire: P185/65R14 85S; specified pressure 30 psi (210 kPa).
Verified
1998 Honda Civic GX Owner Manual Supplement — Specifications, pages 31–34
Printed page 32, Tires, Front/Rear size and pressure - Wheel fastener torque
- Not recorded
- Front cold tire pressure
- Not recorded
- Rear cold tire pressure
- Not recorded
Replacement fitment
0/22- Wheel bolt pattern
- Not recorded
- Center bore
- Not recorded
- Front wheel offset
- Not recorded
- Rear wheel offset
- Not recorded
- Wheel fastener thread
- Not recorded
- Spare tire
- Not recorded
- Driver-side wiper
- Not recorded
- Passenger-side wiper
- Not recorded
- Rear wiper
- Not recorded
- 12 V battery specification
- Not recorded
- 12 V battery group / size
- Not recorded
- Low-beam bulb
- Not recorded
- High-beam bulb
- Not recorded
- Fog-lamp bulb
- Not recorded
- Front turn-signal bulb
- Not recorded
- Rear turn-signal bulb
- Not recorded
- Brake-lamp bulb
- Not recorded
- Reverse-lamp bulb
- Not recorded
- Engine air-filter fitment
- Not recorded
- Cabin air-filter fitment
- Not recorded
- Engine oil-filter fitment
- Not recorded
- Engine oil drain washer
- Not recorded
Dimensions and capacity
8/13- Overall length
- 175.2 in
Verified
1998 Honda Civic GX Owner Manual Supplement — Specifications, pages 31–34
Printed page 31, Dimensions - Overall width
- 66.9 in
Verified
1998 Honda Civic GX Owner Manual Supplement — Specifications, pages 31–34
Printed page 31, Dimensions - Overall height
- 54.7 in
Verified
1998 Honda Civic GX Owner Manual Supplement — Specifications, pages 31–34
Printed page 31, Dimensions - Wheelbase
- 103.1 in
Verified
1998 Honda Civic GX Owner Manual Supplement — Specifications, pages 31–34
Printed page 31, Dimensions - Front track
- 58.1 in
Verified
1998 Honda Civic GX Owner Manual Supplement — Specifications, pages 31–34
Printed page 31, Dimensions, front track - Rear track
- 58.1 in
Verified
1998 Honda Civic GX Owner Manual Supplement — Specifications, pages 31–34
Printed page 31, Dimensions, rear track - Ground clearance
- Not recorded
- Curb weight
- Not recorded
- Weight distribution
- Not recorded
- Passenger volume
- 90 ft³
Verified
FuelEconomy.gov vehicle record 14089, pv2, pv4, and hpv - Cargo volume
- 13 ft³
Verified
FuelEconomy.gov vehicle record 14089, lv2, lv4, and hlv - Payload
- Not recorded
- Drag coefficient
- Not recorded
Load and utility
0/13- GVWR
- Not recorded
- Front GAWR
- Not recorded
- Rear GAWR
- Not recorded
- GCWR
- Not recorded
- Maximum trailer weight
- Not recorded
- Maximum tongue load
- Not recorded
- Maximum roof load
- Not recorded
- Cargo-bed length
- Not recorded
- Cargo-bed width
- Not recorded
- Cargo-bed depth
- Not recorded
- Cargo-floor length
- Not recorded
- Cargo-area width
- Not recorded
- Cargo-area height
- Not recorded
Fluids and capacities
4/16- Fuel tank
- Not recorded
- Engine oil capacity
- Not recorded
- Engine oil with filterChange quantity excludes oil remaining in the engine; total oil capacity is 3.7 L. Grade and specification require separate review.
- 3.5 US qt
Verified
1998 Honda Civic GX Owner Manual Supplement — Specifications, pages 31–34
Printed page 31, Capacities, Engine oil change including filter, footnote 2 - Engine oil without filter
- 3.2 US qt
Verified
1998 Honda Civic GX Owner Manual Supplement — Specifications, pages 31–34
Printed page 31, Capacities, Engine oil change without filter, footnote 2 - Conditional engine oil refill
- Not recorded
- Coolant capacityFactory change figure includes coolant in the reserve tank and remaining in the engine. Reserve tank 0.4 L; total system 4.3 L. This is not a measured drained/refill amount.
- 3.4 US qt
Verified
1998 Honda Civic GX Owner Manual Supplement — Specifications, pages 31–34
Printed page 31, Capacities, Engine coolant, Change, footnote 1 - Automatic transmission fluid capacityChange quantity; total capacity is 5.9 L. Fluid specification remains unreviewed.
- 2.9 US qt
Verified
1998 Honda Civic GX Owner Manual Supplement — Specifications, pages 31–34
Printed page 31, Capacities, Automatic transmission fluid, Change - CVT fluid capacity
- Not recorded
- DCT fluid capacity
- Not recorded
- Manual transmission fluid capacity
- Not recorded
- Differential oil capacity
- Not recorded
- Front differential fluid capacity
- Not recorded
- Rear differential fluid capacity
- Not recorded
- Transfer-case fluid capacity
- Not recorded
- A/C refrigerant charge
- Not recorded
- Washer-fluid capacity
- Not recorded
Service specifications
2/17- Minimum fuel octane
- Not recorded
- Engine oil viscosity
- Not recorded
- Engine oil specification
- Not recorded
- Engine oil drain-plug torque
- Not recorded
- Automatic transmission fluid
- Not recorded
- CVT fluid
- Not recorded
- DCT fluid
- Not recorded
- Manual transmission fluid
- Not recorded
- Coolant specification
- Not recorded
- Differential fluid
- Not recorded
- Transfer-case fluid
- Not recorded
- Brake fluid
- Not recorded
- Power-steering fluid
- Not recorded
- A/C refrigerant type
- Not recorded
- Spark-plug type
- NGK PFR7N-D; special platinum-tipped design for Civic GX.
Verified
1998 Honda Civic GX Owner Manual Supplement — Fuel Tank and Spark Plugs, pages 21–22
Printed page 22, Spark Plugs, Specifications - Spark-plug gapFactory tolerance: +0/-0.1 mm (0.03 in +0/-0.004 in). Inspect for corrosion; do not wire-brush and reuse.
- 0.031 in
Verified
1998 Honda Civic GX Owner Manual Supplement — Fuel Tank and Spark Plugs, pages 21–22
Printed page 22, Spark Plug Gap - Spark-plug torque
- Not recorded
Efficiency
3/9- EPA city
- Not recorded
- EPA highway
- Not recorded
- EPA combined
- Not recorded
- EPA city, alternate fuel
- Not recorded
- EPA highway, alternate fuel
- Not recorded
- EPA combined, alternate fuel
- Not recorded
- EPA city MPGe
- 24
Verified
FuelEconomy.gov vehicle record 14089, city08 - EPA highway MPGe
- 31
Verified
FuelEconomy.gov vehicle record 14089, highway08 - EPA combined MPGe
- 27
Verified
FuelEconomy.gov vehicle record 14089, comb08
Range
0/4- Total range
- Not recorded
- Alternate-fuel range
- Not recorded
- Alternate-fuel city range
- Not recorded
- Alternate-fuel highway range
- Not recorded
Emissions
1/4- Tailpipe CO₂
- 260 g/mi
Verified
FuelEconomy.gov vehicle record 14089, co2TailpipeGpm - Emissions classification
- Not recorded
- EPA fuel-economy score
- Not recorded
- EPA greenhouse-gas score
- Not recorded
Safety
0/3- Tire-pressure monitoring
- Not recorded
- Stability control
- Not recorded
- Driver-assistance suite
- Not recorded
Body
0/2- Roof
- Not recorded
- Aerodynamic equipment
- Not recorded
US safety ratings and recalls
Current NHTSA results for this model year, make, and model. Ratings are shown only for NHTSA-tested variants; recall applicability must be confirmed by VIN.
Loading current NHTSA data…
Sources used
Configuration identity and efficiency values come directly from the FuelEconomy.gov record. Marketing-trim names are not inferred where the government record does not state them.
1998 Honda Civic GX Owner Manual Supplement — Specifications, pages 31–34
Original Honda-hosted GX supplement. Reviewed printed 31–32 specifications and capacities; no gasoline or HX inheritance.
- Applies to
- United States model-year 1998 Civic GX compressed-natural-gas supplement only
- Retrieved
- 2026-10-15
FuelEconomy.gov model-year bulk vehicle records
Official bulk configuration, engine, transmission, drivetrain, fuel-economy, volume, and emissions records; the official record API is the bounded fallback.
- Applies to
- United States, complete imported model years 1984, 1985, 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022, 2023, 2024, 2025, 2026
- Retrieved
- 2026-08-31
1998 Honda Civic GX Owner Manual Supplement — Fuel Tank and Spark Plugs, pages 21–22
Original Honda-hosted supplement. Printed 22 plug type, gap tolerance, torque and replacement conditions visually reviewed.
- Applies to
- United States model-year 1998 Civic GX compressed-natural-gas supplement only
- Retrieved
- 2026-10-15