Honda CR-V & Civic 1.5 Turbo Oil Dilution: Check & Fix

By the Radman Auto Repair team, independent auto repair in Etobicoke since 1999 · Updated November 2026

Honda’s 1.5-litre turbo engine (CR-V, Civic and Accord) can collect gasoline in its oil, especially in Canadian winters with short trips. The oil level climbs, the oil smells of fuel, and the oil loses protection. You can check it yourself in five minutes.

Symptoms

What Causes It

Before You Start

• Park on level ground, set the parking brake and chock the wheels. Never work under a car held up only by a jack: use rated jack stands.
• Let the engine and exhaust cool before you touch them; coolant systems are under pressure when hot.
• Wear safety glasses and gloves, and disconnect the 12V battery before unplugging electrical parts or working near airbags.
• Check for open recalls on your VIN (Transport Canada or the manufacturer’s site) before you buy parts: a recall repair is free at the dealer.
• Check the oil when the engine has been off for at least 10 minutes so the reading is accurate.

Step-by-Step: Honda 1.5T Oil Dilution

1. Park level and wait. Turn the engine off and wait 10 minutes so the oil drains back to the pan.
2. Read the dipstick. Pull it, wipe it, push it fully back in and pull it again. Note where the oil sits against the marks.
3. Smell the oil. A sharp gasoline smell on the dipstick or under the filler cap means fuel dilution.
4. Track it. Write down the level and the odometer reading every week for a month. A level that keeps rising confirms the problem.
5. Check your VIN. Look up your VIN on Honda Canada’s recall and campaign page or call a Honda dealer. Many 2016–2018 Civic and 2017–2018 CR-V had a free software update and extended engine coverage.
6. Change the oil early. Drain the oil, replace the filter and drain plug washer, and refill with the 0W-20 grade in your owner’s manual. Do not switch to a thicker oil.
7. Shorten the winter interval. Change the oil about every 5,000 km from November to March, or sooner if the level rises again.
8. Drive it warm. Once or twice a week, drive 20 minutes or more at highway speed so the engine gets fully hot and fuel evaporates from the oil.

When to Stop and Bring It In

• The oil is more than about 1 cm above the full mark or is very thin.
• The check engine light is flashing or the engine runs rough (see flashing check engine light).
• The oil looks milky or light brown: that is coolant, a different and more serious problem.
• You want the update or warranty work done: that is a dealer job; we can document the problem for you first.

Not sure, or out of time? Radman Auto Repair in Etobicoke does this repair every week. Book online or call (416) 742-4521.

Also Known As

Owners describe this as “gas in the oil”, “oil level going up”, “oil smells like fuel”, “CR-V oil dilution” or the “Earth Dreams 1.5 turbo oil problem”. It affects the L15B7 turbo engine in the CR-V, Civic and Accord.

Frequently Asked Questions

See also Honda Repair & Service, Synthetic Oil Change, Honda Check Engine Light, Rough Idle Diagnosis.

Radman Auto Repair

4.8

Based on 118 reviews

powered by Google

review us on

Alex Joseph

11:02 10 Oct 26

Alex is a great guy. He took the time to respond by phone and walk me through my options for my Tesla Model Y 2024 and gave me his perspectives as a Tesla owner. Top recommendation in my books for the Toronto area.

France T

20:58 31 Aug 26

I cannot say enough good things about Livio and the team at Radman Auto Repair in Rexdale. We brought in my son’s 2015 Mitsubishi Lancer because the A/C was malfunctioning. We had already been to two other shops, paid for diagnostics, and received different explanations, so we were frustrated and unsure what to do next. Livio was outstanding. He listened carefully, looked at the issue, and explained everything clearly and in detail in a way that actually made sense. He was able to narrow down what was going on within minutes, without guessing, pressure, or recommending unnecessary work. What really stood out was that he did not charge us another diagnostic fee after learning we had already paid for two separate diagnoses. Even better, the work was completed the same day, which was a huge relief. It is rare to find a mechanic who is knowledgeable, honest, patient, efficient, and genuinely focused on helping customers understand the real issue before they spend money on repairs. Livio truly gets it. We are so happy we found Radman Auto Repair and would highly recommend Livio and his team to anyone looking for trustworthy, skilled, and customer-focused service..

Roney Zachariah

04:42 10 Aug 26

My 2015 Honda CR-V was blowing hot air and making noise when the A/C was on. The Compressor and Expansion valve needed replacement due to metal debris in the system. I rarely write reviews, but I felt it would be wrong not to appreciate Radman for their service, especially after what I went through before finding them. I’m writing this one month after the repair because I wanted to test my A/C on multiple long trips before recommending them. One thing I learned from this experience is that many mechanics know how to replace parts, but very *few follow the right procedures* and perform the proper checks. I initially went for a cheaper repair at a local mechanic. The problem came back, and afterward he didn’t seem to know what to do next. I found Radman through Google reviews without any personal recommendation, so I was taking a chance. They properly diagnosed the issue, explained everything clearly before starting the work, didn’t exaggerate the problem, and charged me a reasonable price. A/C issues can be complicated but they answered all my questions and I honestly haven’t had such a good and detailed conversation with a mechanic in the GTA about an A/C problem. Their knowledge and experience with A/C systems really stood out. I also had a catalytic converter issue. Another mechanic simply recommended replacing it, which would have cost at least $2,000. Radman explained that considering the age and condition of my 2015 CR-V, such an expensive replacement might not make sense. They gave me the replacement cost but also suggested trying Cataclean first. I tried it, and so far I haven’t had any issues. After a month and several long trips, my A/C is still working well. It’s rare to find this combination of knowledge, transparency, and honesty. Thank you, Radman, for the knowledgeable and honest service. I genuinely appreciate it.

Moklas Salkon

17:17 23 Jun 26

I fix my cars myself but I always go to Radman for AC work. Been coming here for years and they do great work and are fairly priced. The guys are honest and reliable. Very clean waiting room too!

Alexa De Los Santos

18:30 26 May 26

Finding a mechanic who actually understands EVs and is completely trustworthy is hard to come by, but ⁠Radman Repair is excellent. The service was top-notch, they explained everything to me with so much patience, and the overall experience was a 10/10. 100% recommended!

See All Reviews