2018 Honda Clarity Oil Type & Capacity
1.5L · Tire Size · MPG · Factory specs and recall history
- Engine 1.5L
- Fuel PLUG-IN HYBRID EV-GAS (PHEV)
Instant answer
3.5 qt of SAE 0W-20
Oil capacity
3.5 qt
Refill volume including a new filter
Oil viscosity
SAE 0W-20
SAE grade the manufacturer specifies
Front tire size
235/45R18
Factory fitment, front axle
Change interval
Estimated10,000 miles
Manufacturer maximum between changes
Trims covered
These specs resolve across the model year as a whole, so they cover all 2 trims the catalog holds for it:
- Plug-In Hybrid
- Plug-In Hybrid Touring
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Oil type and capacity, tire size and EPA fuel economy for the 2018 Honda Clarity, plus the recall campaigns NHTSA has filed against this year, make and model. Every figure says where it came from, so you can tell a published specification from an estimate at a glance.
Engine oil
2018 Honda Clarity oil type and capacity
The 2018 Honda Clarity takes SAE 0W-20 engine oil, about 3.5 qt with a filter change.
- Oil viscosity SAE grade the manufacturer specifies
- SAE 0W-20 Verified spec
- Oil capacity Refill volume including a new filter
- 3.5 qt Verified spec
- Change interval Manufacturer maximum between changes
- 10,000 miles Estimated
- Or every Whichever comes first
- 12 months Estimated
Know when your Clarity is actually due
These are the numbers for the model year. Add your own Clarity and we track oil life against your real mileage, then email you the week it is due.
Tires
2018 Honda Clarity tire size
The factory tire size on the 2018 Honda Clarity is 235/45R18.
The placard inside your own driver's door is the authority for pressure: it is set for the tires that car actually shipped with.
- Front tire size Factory fitment, front axle
- 235/45R18 Verified spec
- Rear tire size Factory fitment, rear axle
- 235/45R18 Verified spec
- Front tire pressure Cold inflation, front axle
- Not published
- Rear tire pressure Cold inflation, rear axle
- Not published
Seeded rows exist for this vehicle but none carries this field, and there was too little to estimate from.
Seeded rows exist for this vehicle but none carries this field, and there was too little to estimate from.
EPA fuel economy
2018 Honda Clarity MPG
The EPA rates it at 42-114 mpg combined, 44-126 mpg city and 40-103 mpg highway. Figures span 3 configurations of this model year.
Combined
42-114 mpg
EPA combined cycle
City
44-126 mpg
EPA city cycle
Highway
40-103 mpg
EPA highway cycle
Range
89-366 mi
Electric range, EPA test cycle
Fuel: Regular Gas and Electricity / Electricity / Hydrogen
Safety recalls
2018 Honda Clarity recalls
Campaigns NHTSA has filed against this year, make and model, grouped by what the campaign actually asks an owner to do.
We have not completed a recall check for this vehicle yet, so this page cannot tell you whether campaigns exist. That is not the same as there being none.
Check your own VIN on NHTSA.gov
Keep a record of what has been done
Log the work as it happens with dates, mileage, cost and photos, so a remedy you have already had carried out is something you can show rather than something you have to remember.
Never look up your Clarity's numbers again.
Add yours and these figures stop being a reference and start being your car. It takes a minute.
- Oil life tracked against your real mileage
- Every fill-up, with the cost and MPG behind it
- Registration and insurance dates that stop surprising you
- Service history with photos and receipts
One weekly email, and only when something is actually due.
Common questions
2018 Honda Clarity maintenance questions
What kind of oil does a 2018 Honda Clarity take?
The 2018 Honda Clarity takes SAE 0W-20 engine oil, about 3.5 qt with a filter change.
How often does a 2018 Honda Clarity need an oil change?
Every 10,000 miles or 12 months, whichever comes first. This figure is estimated from the engine rather than taken from a published spec, so confirm it against the owner's manual.
What size tires does a 2018 Honda Clarity use?
The factory tire size is 235/45R18.
What gas mileage does a 2018 Honda Clarity get?
The EPA rates it at 42-114 mpg combined, 44-126 mpg city and 40-103 mpg highway. Figures span 3 configurations of this model year.
Where these figures come from
- Vehicle details are decoded from VIN data published by NHTSA's vPIC database.
- Fuel economy comes from the EPA's published fuel economy dataset.
- Recall campaigns come from NHTSA. A campaign covers a VIN range within a model year, so a listing here is never a statement about a specific vehicle.
- Service specs are compiled per trim. Anything marked Estimated was derived from the engine rather than read from a published specification, and your owner's manual or door placard outranks it.
Catalog entry last updated 2026-08-30.