Why does my Acura Integra's oil smell like gas?

Short answer: A slight gas smell in the oil on an Integra 1.5T is common with short, cold trips. Watch the dipstick level. If it keeps going up, get the dealer to look at it under warranty.

Symptom: A gasoline smell on the dipstick or at an oil change, an oil level that seems to rise, or thin-feeling oil.

What to check first

1. Smell the dipstick for gasoline and check whether the level is going up.
2. Mix in a longer highway drive now and then if you mostly do short trips.
3. Consider an oil analysis if you're worried.
4. Ask the dealer about software updates if the level keeps rising.

Likely causes

1. Fuel dilution from short cold trips. Direct-injection turbo engines can let a little fuel slip into the oil when the engine never fully warms up. The oil can then smell like gas.
2. Very short trips in cold weather. Owners in cold places notice it most. A longer drive now and then helps the fuel burn off.
3. Software or mechanical issue (less common). If the level keeps rising, the dealer should check it under warranty.

What it usually costs

Extra oil changes and an oil analysis are inexpensive. Warranty covers real faults on these newer cars.

Is it safe to keep driving?

A mild fuel smell is generally safe. A rising oil level is not normal, so get it checked.

DIY or shop?

Checking oil and doing changes is DIY. Software and diagnosis need a dealer.

Recalls, bulletins and complaints in plain words

• Related recalls: NHTSA lists these recalls touching this area of the Acura Integra: 24V744000 (2023-2025 model years, steering). Check your VIN at nhtsa.gov/recalls. If your car is part of this recall, the dealer fixes it for free.
• Plain words: The complaint count below shows how often owners reported problems that mention these words to NHTSA. A count is not proof of a defect.
• NHTSA complaints: 5 keyword-matched complaints for Acura Integra 2023–2025 (of 284 unique complaints queried, NHTSA complaints API by model year, queried 2026-11-07; keywords: oil, dilut, fuel smell, gasolin, crankcase). This counts complaints that mention these words. It is not a defect finding.

What owners report

• In Oil Dilution 1.5T Integra on Reddit r/Acura, an Integra 1.5T owner asked whether the oil dilution known from earlier Honda 1.5T engines affects the Integra too.
• In First oil Change Possible Smell of Fuel on IntegraForums, an owner noticed a possible fuel smell at the first oil change and asked others whether it was normal.
• In Issues with 1.5T engine? on Reddit r/Acura, someone asked about known problems with the 1.5T engine before buying.

Quick tip

If you mostly drive short trips, change the oil on time and take the long way home once a week.

Vehicle focus: Acura Integra (2023–2025) with the 1.5L turbo (not the Type S 2.0T).

Safety / mechanic note

Severely diluted oil protects bearings poorly. Verify with a mechanic if the level keeps rising.