FL5 Motor oil Brand and Grade

[TurboZed-R]

I'm a fan of amsoil and the SS definitely exceeds the specs required. I'm also a liqui moly fan and run that between routine service visits. Keep up your service visits and run what you want in the mean time.

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[B34R]

I like Motul so I used Motul 8100 Power 0w-20. Seems good so far

 

[TurboZed-R]

Amsoil Signature Series is not API certified which is the only spec required by the owners manual.

Never said it was certified, said it exceeds Api, which it definitely does.

 

[Potato fl5]

On amsoil site I thought it said it was sp certified

 

[Rhorn]

Yeah, that’s totally understandable. In the event of an engine problem, Honda would definitely want records of your oil changes, which would show what you had put in the engine. API or not could be a point of contention. I think @AspecR has the best advice. Maybe by the time your ServicePass period has run out, Amsoil will have gotten the Signature Series API certified. They’re losing potential sales by not having it I think.

Just to clarify, this really wouldn't happen. Legally an OEM can't deny a warranty claim due to the type of lubricant used because those lubricants are not provided free of charge (which is why people like OP ask this question)

If your warranty does get denied and Honda pins it on the fact that it was to the oil (in this hypothetical case, Amsoil) Amsoil will step in and pay for your engine. Its really rare to have an engine failure caused directly by the oil.

You dont have anything to worry about with Amsoil.

https://www.amsoil.com/about/guaran...hGJt1CK6QyW1fHHw4D8PJkPD_hBThV32n5sck53Foj3Lx

 

[Zpeedster M]

Too many oil threads, it's a consumable pour Mugen or Wally world dino juice and call it a day
With the Magnuson-Moss Warranty Act, dealer has to prove something before denying warranty which is also dependent on individual dealer.

 

[TypeRD]

Just to clarify, this really wouldn't happen. Legally an OEM can't deny a warranty claim due to the type of lubricant used because those lubricants are not provided free of charge (which is why people like OP ask this question)

If your warranty does get denied and Honda pins it on the fact that it was to the oil (Amsoil) Amsoil will step in and help. Is really rare to have an engine failure caused by a specific brand

You dont have anything to worry about with Amsoil.

https://www.amsoil.com/about/guaran...hGJt1CK6QyW1fHHw4D8PJkPD_hBThV32n5sck53Foj3Lx

Yeah I agree. I was just saying it theoretically “could be” a point of contention if the person looking at the warranty claim is scrutinizing every minuscule detail…even just to be a jerk and intentionally delay the process of fixing the car. If it helps put one’s mind at ease, then just use API oil. No need to overthink this stuff nor the crazy 0.1% chance of having an issue be blamed on Amsoil.

 

[zumbooruk]

just for giggles, I asked Grok (I know not to blindly trust any AI tool, but sometimes it is a useful research shortcut) to recommend oil specifically for the FL5 and aggressive driving but not track use in hot SoCal summer

this is what "Think" answered:

To determine the best premium synthetic motor oil for your 11th generation FL5 Honda Civic Type R with a 2.0L turbocharged engine, we need to consider your specific use case: aggressive daily driving in hot Southern California weather, but not for track or racing. You’ve asked whether Honda’s U.S.-recommended 0W-20 is better than the 5W-30 recommended in Europe, and you’ve provided a list of example brands including Amsoil Signature Series, Red Line High Performance, Pennzoil Ultra Platinum, Castrol Edge, Motul 8100 X-Clean, Royal Purple, and Mobil 1 EP. Below, I’ll break this down into viscosity considerations and brand recommendations to give you a clear answer.

---

### Understanding Viscosity: 0W-20 vs. 5W-30
Motor oil viscosity is indicated by numbers like 0W-20 and 5W-30. The first number (before the "W," which stands for winter) represents the oil’s viscosity at low temperatures, while the second number (after the "W") indicates viscosity at high operating temperatures. Here’s how they compare:

- **0W-20**: This is a thinner oil, with excellent flow at cold starts (the "0W" part) and a lower viscosity at high temperatures (the "20"). Honda recommends it in the U.S. for the Civic Type R, likely to optimize fuel efficiency and meet emissions standards. However, in hot climates and under aggressive driving, it may thin out more, potentially offering less protection for the engine.
- **5W-30**: This oil is slightly thicker at both cold and hot temperatures. The "5W" means it’s less fluid at startup than 0W-20, but this is less of a concern in warm Southern California. The "30" means it maintains a thicker film at high temperatures, which can provide better protection for a turbocharged engine under stress.

For your conditions—hot weather and aggressive driving—a 5W-30 oil could offer an advantage by maintaining a more robust oil film to protect the engine, especially the turbocharger, which generates significant heat. However, Honda’s U.S. specification of 0W-20 is tailored to the engine’s design and warranty requirements, so deviating from it could have implications.

### Viscosity Recommendation for Your Scenario
Given Southern California’s high temperatures and your aggressive driving style, **5W-30** may provide better protection than 0W-20. The turbocharged 2.0L K20C1 engine in the FL5 Type R operates under high stress during spirited driving, and a thicker oil like 5W-30 can better withstand heat and maintain lubrication under these conditions. That said, Honda’s engineers chose 0W-20 for a reason—likely balancing performance, efficiency, and emissions—and using a different viscosity could potentially affect warranty coverage or long-term engine health.

**Key Advice**: Before switching to 5W-30, consult your Honda dealer or a trusted mechanic to confirm it’s safe for your engine and won’t void your warranty. If you stick with 0W-20, a premium synthetic oil can still perform well, though you might consider shorter oil change intervals to compensate for the heat and driving style.

### Premium Synthetic Oil Brand Recommendations
Here’s an evaluation of the brands you listed, focusing on their suitability for your Civic Type R in this scenario:

#### Top Recommendations
1. **Amsoil Signature Series**
- **Why**: A true PAO/ester-based synthetic, offering exceptional high-temperature stability and wear protection. It has a high molybdenum content, which reduces wear during cold starts and high-stress driving.
- **Best For**: Aggressive driving in hot weather, with long drain intervals.
- **Viscosity Option**: Available in both 0W-20 and 5W-30—choose 5W-30 for added protection if approved.

2. **Red Line High Performance**
- **Why**: Ester-based, providing outstanding thermal stability and resistance to breakdown. It’s a favorite for turbocharged engines due to its cleanliness and low volatility.
- **Best For**: High-stress conditions and hot climates.
- **Viscosity Option**: Offers 0W-20 and 5W-30—5W-30 is ideal here if you switch.

3. **Pennzoil Ultra Platinum**
- **Why**: Made from natural gas via PurePlus™ technology, it’s very clean, low-volatility, and protects against wear and deposits. It’s a cost-effective yet high-performing option endorsed by performance brands.
- **Best For**: Turbo engines and daily driving with a budget-friendly edge.
- **Viscosity Option**: Available in 0W-20 and 5W-30—5W-30 aligns well with your needs if permissible.

#### Other Options
- **Castrol Edge**: Features titanium additives for strength under pressure. It’s solid but may not match Amsoil or Red Line in extreme heat stability. Available in both viscosities.
- **Motul 8100 X-Clean**: Tailored for European engines with particulate filters, which isn’t a priority for your U.S.-spec Type R. It’s good but not the best fit here.
- **Royal Purple**: Offers decent performance, but recent reviews suggest it lags behind top-tier competitors in high-stress scenarios.
- **Mobil 1 Extended Performance (EP)**: A reliable, widely available choice, though some argue its edge has dulled compared to newer formulations like Pennzoil Ultra Platinum.

---

### Final Recommendation
For your FL5 Honda Civic Type R, aggressive daily driving in hot Southern California weather calls for a premium synthetic oil that excels in high-temperature protection. Here’s my advice:

- **Best Choice**: **Amsoil Signature Series 5W-30** or **Red Line High Performance 5W-30**, assuming you verify with your dealer that switching from 0W-20 is acceptable. These oils offer top-tier protection for your turbo engine under heat and stress.
- **Safe Alternative**: If you prefer to follow Honda’s U.S. recommendation, use **Amsoil Signature Series 0W-20** or **Pennzoil Ultra Platinum 0W-20**. These provide excellent performance within spec, with Pennzoil being more budget-friendly.

**Maintenance Tip**: Turbo engines thrive on regular oil changes. Stick to Honda’s schedule (typically every 7,500–10,000 miles with synthetic oil), or shorten it to 5,000 miles for added peace of mind given your driving style and climate.

In summary, 5W-30 from Amsoil or Red Line is likely the best for your needs, but confirm the switch with a professional. If you stay with 0W-20, Amsoil or Pennzoil are superb choices. Enjoy your Type R!


and exact same question with "deeper search", and the main difference seems to be "stick with 0-w20":

### Key Points
- Research suggests 0W-20 synthetic oil is recommended by Honda for your Civic Type R in the US, suitable for hot climates like Southern California.
- It seems likely that 0W-20 offers better fuel efficiency and meets engine design specs, while 5W-30, recommended in Europe, may provide added protection in extreme heat but isn't necessary for daily driving.
- The evidence leans toward using premium brands like Amsoil Signature Series, Red Line, or Pennzoil Ultra Platinum in 0W-20 for aggressive driving, ensuring high-temperature stability.

### Oil Recommendation
For your 11th generation FL5 Honda Civic Type R with a 2.0L Turbo engine, Honda recommends using 0W-20 synthetic oil in the US, which is designed to handle the hot Southern California weather for aggressive daily driving. This viscosity provides a balance of fuel efficiency and engine protection as per the manufacturer's specifications. Given your driving style, sticking with 0W-20 from a premium brand like Amsoil Signature Series, Red Line High Performance, or Pennzoil Ultra Platinum will ensure adequate protection and performance.

### Suggested Brands
Among the brands you mentioned, all offer 0W-20 options that meet API SN or higher standards. For aggressive driving, consider:
- **Amsoil Signature Series 0W-20** for long drain intervals and superior protection.
- **Red Line 0W-20 High Performance** for its high-temperature stability, ideal for hot climates.
- **Pennzoil Ultra Platinum 0W-20** for its purity and performance.

Other options like Castrol Edge, Motul 8100 Eco-lite, Royal Purple HMX, and Mobil 1 Extended Performance in 0W-20 are also excellent. Choose based on availability and preference, with Red Line or Amsoil being top picks for your needs.

#### Regional Considerations and Climate Impact
Southern California's hot weather, with temperatures often above 90°F, increases engine oil temperatures, especially under aggressive driving. While 0W-20 is designed to handle this, some users opt for 5W-30 in extreme conditions, as seen in European recommendations and forum discussions. However, given Honda's global recommendation of 0W-20 for the FL5, as seen on Cox Motor Parts for UK models ([Honda Oil and Fluid Information](https://www.coxmotorparts.co.uk/honda-oils-fluids-information/)), and its suitability in Australia ([CarsGuide](https://www.carsguide.com.au/car-advice/q-and-a/honda-civic-engine-oil-what-type-how-to-change-90407)), it seems adequate. The choice to deviate to 5W-30 should be based on personal preference, but it's not necessary for daily use and may void warranty if not approved.

#### Conclusion and Final Recommendation
For your Civic Type R, use a premium 0W-20 synthetic oil to align with Honda's specifications and ensure optimal performance in hot, aggressive driving conditions. Among the listed brands, Red Line 0W-20 High Performance is recommended for its high-temperature stability, ideal for Southern California. Alternatives include Amsoil Signature Series 0W-20 for long-term protection and Pennzoil Ultra Platinum 0W-20 for reliability. Stick with 0W-20 over 5W-30 for daily driving, as it's designed for your engine and climate, with no significant benefit from the thicker viscosity for your use case.

### Key Citations
- [Honda Owners 2023 Civic Type R Manuals](https://owners.honda.com/vehicle-information/information/2023/Civic-Type-R/manuals)
- [Amsoil Product Lookup for 2018 Honda Civic](https://www.amsoil.com/lookup/auto-and-light-truck/2018/honda/civic/2-0l-4-cyl-engine-code-k20c1-b-turbo/)
- [Red Line 0W20 Motor Oil](https://www.redlineoil.com/0w20-motor-oil)
- [Pennzoil Ultra Platinum Motor Oil](https://www.pennzoil.com/en_us/products/motor-oil/ultra-platinum.html)
- [Castrol Edge Motor Oil](https://www.castrol.com/en_us/united-states/home/motor-oil-and-fluids/engine-oils/motor-engine-oils/edge-brands/castrol-edge.html)
- [Motul 8100 Eco-lite 0W20](https://www.motul.com/us/en-US/products/8100-eco-lite-0w20)
- [Royal Purple HMX Motor Oil](https://www.royalpurpleconsumer.com/products/hmx-high-mileage-motor-oil/)
- [Mobil 1 Extended Performance Motor Oil](https://www.mobil.com/en/lubricants/for-personal-vehicles/our-products/mobil-1-extended-performance)
- [Honda Civic Engine Oil Guide](https://www.carsguide.com.au/car-advice/q-and-a/honda-civic-engine-oil-what-type-how-to-change-90407)
- [Honda Oil and Fluid Information](https://www.coxmotorparts.co.uk/honda-oils-fluids-information/)

 

[AZCWTypeR]

The Honda UK owners manual shows 5W-30 okay in all temperatures.

0W-20 oil is specified due the EPA CAFE standards. 5W-30 is a much better choice.

A relative worked in a Big 3 dyno endurance test department when they switched to 0W-20. Then engines started wearing out due to oil related issues. Prior to that, they all wore out from burnt valves. The endurance tests are accelerated by a lot of recline running, along with load and rpm cycling.

 

[AspecR]

The Honda UK owners manual shows 5W-30 okay in all temperatures.

0W-20 oil is specified due the EPA CAFE standards. 5W-30 is a much better choice.

A relative worked in a Big 3 dyno endurance test department when they switched to 0W-20. Then engines started wearing out due to oil related issues. Prior to that, they all wore out from burnt valves. The endurance tests are accelerated by a lot of recline running, along with load and rpm cycling.

Worst part is 0W-20 only really saves you like 1 MPG, I'm sure every single person that owns a CTR will be fine with 1 less mile per gallon if it means their engine is better protected.

 

[AZCWTypeR]

In the mid to late '80's pro showroom stock racing was popular and televised. Well sponsored teams switched to 0W oils because it was worth about 3hp increase. They had to be well sponsored, because the engine only lasted a weekend or two vs. all season for teams using heavier weight oils.

My local Porsche dealer built a blueprinted 944 engine they said gave them a 10-15 hp edge (vs. stock) in the series. The dealer was provided access to a large pool of factory parts to match weights and tolerances. They used heavier oils, since the blueprinted engine was expensive and time consuming to build.

 

[AZCWTypeR]

0W-20 fuel savings is about 0.2 mpg. It only makes sense in the context of CAFE, where auto companies are fined for missing the mark.

 

[svvitch]

Too many oil threads, it's a consumable pour Mugen or Wally world dino juice and call it a day
With the Magnuson-Moss Warranty Act, dealer has to prove something before denying warranty which is also dependent on individual dealer.

This. Use what's easy to get and then change it on schedule. M1 ESP 0w30 or 5w30 is readily available at wally world

 

[zumbooruk]

Worst part is 0W-20 only really saves you like 1 MPG, I'm sure every single person that owns a CTR will be fine with 1 less mile per gallon if it means their engine is better protected.

I agree that MPG should not be a consideration, yet I am not convinced that 5w-30 is better overall.

I am still researching and reading, as I know nothing about oils, and the more I read the more confused I get.

from what I am understanding, It seems that 0W-20 helps keep the engine and turbo charger cooler due to better flow, also the lighter oil transfer heat faster due to lower internal friction

yet 5W-30 may offer extra protection in hot conditions or track use

I am at about 1500 and getting ready to do my first oil change. then every 4,000 miles.

I ordered Pennzoil Ultra Platinum in both 0W-20 and 5W-30 (and Fram Synthetic XG filters)

I might do the first change with the 0W-20, then 5W-30 for the hotter summer months, and back to 0W-20 for winter

or just flip a coin...

 

[AspecR]

I agree that MPG should not be a consideration, yet I am not convinced that 5w-30 is better overall.

I am still researching and reading, as I know nothing about oils, and the more I read the more confused I get.

from what I am understanding, It seems that 0W-20 helps keep the engine and turbo charger cooler due to better flow, also the lighter oil transfer heat faster due to lower internal friction

yet 5W-30 may offer extra protection in hot conditions or track use

I am at about 1500 and getting ready to do my first oil change. then every 4,000 miles.

I ordered Pennzoil Ultra Platinum in both 0W-20 and 5W-30 (and Fram Synthetic XG filters)

I might do the first change with the 0W-20, then 5W-30 for the hotter summer months, and back to 0W-20 for winter

or just flip a coin...

For 90% of owners, 0W-20 like the factory uses and recommends will be fine (my own car has Honda Ultimate 0W-20 in it right now) but we can’t ignore the fact that 0W-20 is factory recommended only in regions that have to adhere to CAFE regulation(s).

My advice to anyone that asks and all my clients that have bought them from me is to run 0W-20 API SN certified oil with your favorite color label on it. Unless your car has an upgraded turbo and is tracked regularly then move to 5W-30.
Plus if you bought a 2023 or 2024 MY new and have a good dealer, then you don’t have to think about oil changes just yet

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