What octane rating for 2024 Honda civic touring
Octane rating
dave11G
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Welcome, usually in the "New Member Introductions" part of the forum you introduce yourself and the car you have.
This topic has probably been beaten to death, I'd use the search bar and check out all the different posts regarding fuel octane.
Use the right octane that's available to you and especially make sure you use the right octane if you're running a tune.
From the owners manual...
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This topic has probably been beaten to death, I'd use the search bar and check out all the different posts regarding fuel octane.
Use the right octane that's available to you and especially make sure you use the right octane if you're running a tune.
From the owners manual...
I just use 87 in mine. Not sure if there would be any benefit of running 91. Sunoco used to sell 94, but not sure if they still do.
Worlds fastest 2035 super sick 800rpm Honda civic hybrid hatchback with HPD kit and a cool spoiler
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I've run all of them in my lil 2.0L and maybe it's placebo, but I find that 87 and just as good as 89, but 93 is completely different. I already have a really shaky car from my RMM and 93 helps just a little with the roughness.
Been trying 94 for a while now since they introduced it up where I live, not wildly different to 93. If anything it just makes me feel like I'm being nicer to my car.
Been trying 94 for a while now since they introduced it up where I live, not wildly different to 93. If anything it just makes me feel like I'm being nicer to my car.
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If it calls for 87 you should run 87. There is absolutely no benefit to running a higher octane in your car if it’s not tuned for it, it won’t be more powerful or more efficient or more smooth or any of that. The higher octane allows the engine to run more aggressive timing and make more power but cars that are only designed for 87 don’t know what to do with the higher octane and don’t change timing to give you any of the benefits that come with it. Mazda 2.5t are designed to run either or and the power will vary, this is not the case for the 1.5t in the civic.
Touring civic
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The answer is still 87
Worlds fastest 2035 super sick 800rpm Honda civic hybrid hatchback with HPD kit and a cool spoiler
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I just think he wants an excuse to use 94
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I say you just run the highest octane you can afford, you'll actually never run into knocking issues unless you tune and mod, but if it gives you peace of mind, gopher it.
Well the manual does say (or higher) if it states a minimum I wouldn't go below that...
Is it required that you run higher?
Well obviously no if it states 87 is the minimum you can run then says (or higher). With a maximum 15% ethanol in the fuel mix.
So what would happen if you tanked up with 91 octane going for the (or higher)?
The advanced engine control management system in a new honda civic is designed to monitor various engine parameters and adjust fuel delivery and ignition timing accordingly. This system can detect the octane level of the fuel being used and optimize the engine performance to ensure optimal fuel efficiency and power output.
When using a wide range of octane fuels, the engine control management system can detect the lower or higher octane level and make the necessary adjustments to prevent engine knocking or pinging. For example, if a lower octane fuel is detected, the system can retard the ignition timing to prevent premature combustion and engine knock. On the other hand, if a higher octane fuel is detected, the system can advance the ignition timing to take advantage of the fuel’s higher resistance to knocking and potentially increase performance.
Overall, the Advanced engine control management system in a new Honda Civic helps to maximize engine performance and efficiency regardless of the octane level of the fuel being used. It ensures that the engine is operating at its best under any driving conditions and fuel quality.
If that's not in depth enough here's exactly how it adjust and what it adjusts.🙂
When a vehicle engine is designed to accommodate a range of octane levels in fuel, several parameters can be adjusted to optimize performance and fuel efficiency. Some of the key parameters that can be adjusted in an engine to accommodate different octane levels include:
1. Ignition timing: The timing at which the spark plug ignites the air-fuel mixture in the combustion chamber can be adjusted to optimize combustion based on the octane level of the fuel.
2. Air-fuel ratio: The ratio of air to fuel in the combustion chamber can be adjusted to ensure proper combustion and performance with different octane levels.
3. Variable valve timing: The timing and lift of the intake and exhaust valves can be adjusted to optimize airflow into and out of the combustion chamber based on the octane level of the fuel.
4. Fuel injection timing and duration: The timing and duration of fuel injection into the combustion chamber can be adjusted to optimize combustion with different octane levels.
5. Knock sensor sensitivity: The sensitivity of the knock sensor, which detects knocking or pinging in the engine, can be adjusted to prevent engine damage and optimize performance with different octane levels.
By adjusting these parameters, the engine in a vehicle like the new Honda Civic can optimize performance, fuel efficiency, and emissions based on the octane level of the fuel being used.
Last I looked these vehicles have variable valve timing with electronic lift. They also have electronically controlled engine ignition timing. They also have dual cam phasers which can advance or retard the camshafts timing. There's also knock sensors listening to the engine trying new things all the time. To help better determine what octane fuel the engine is being fed.
Is it required that you run higher?
Well obviously no if it states 87 is the minimum you can run then says (or higher). With a maximum 15% ethanol in the fuel mix.
So what would happen if you tanked up with 91 octane going for the (or higher)?
The advanced engine control management system in a new honda civic is designed to monitor various engine parameters and adjust fuel delivery and ignition timing accordingly. This system can detect the octane level of the fuel being used and optimize the engine performance to ensure optimal fuel efficiency and power output.
When using a wide range of octane fuels, the engine control management system can detect the lower or higher octane level and make the necessary adjustments to prevent engine knocking or pinging. For example, if a lower octane fuel is detected, the system can retard the ignition timing to prevent premature combustion and engine knock. On the other hand, if a higher octane fuel is detected, the system can advance the ignition timing to take advantage of the fuel’s higher resistance to knocking and potentially increase performance.
Overall, the Advanced engine control management system in a new Honda Civic helps to maximize engine performance and efficiency regardless of the octane level of the fuel being used. It ensures that the engine is operating at its best under any driving conditions and fuel quality.
If that's not in depth enough here's exactly how it adjust and what it adjusts.🙂
When a vehicle engine is designed to accommodate a range of octane levels in fuel, several parameters can be adjusted to optimize performance and fuel efficiency. Some of the key parameters that can be adjusted in an engine to accommodate different octane levels include:
1. Ignition timing: The timing at which the spark plug ignites the air-fuel mixture in the combustion chamber can be adjusted to optimize combustion based on the octane level of the fuel.
2. Air-fuel ratio: The ratio of air to fuel in the combustion chamber can be adjusted to ensure proper combustion and performance with different octane levels.
3. Variable valve timing: The timing and lift of the intake and exhaust valves can be adjusted to optimize airflow into and out of the combustion chamber based on the octane level of the fuel.
4. Fuel injection timing and duration: The timing and duration of fuel injection into the combustion chamber can be adjusted to optimize combustion with different octane levels.
5. Knock sensor sensitivity: The sensitivity of the knock sensor, which detects knocking or pinging in the engine, can be adjusted to prevent engine damage and optimize performance with different octane levels.
By adjusting these parameters, the engine in a vehicle like the new Honda Civic can optimize performance, fuel efficiency, and emissions based on the octane level of the fuel being used.
Last I looked these vehicles have variable valve timing with electronic lift. They also have electronically controlled engine ignition timing. They also have dual cam phasers which can advance or retard the camshafts timing. There's also knock sensors listening to the engine trying new things all the time. To help better determine what octane fuel the engine is being fed.
For an N/A car I would say use the minimum recommended octane. For a turbo car, I would go with 91. Interesting how the manual transmission is instructed to use 91, and cvt 87.
Another note, the people that have tuned their civics fight with knocking at higher than stock boost levels. This makes me assume that this motor is prone to knock. I run 91 in my EX-L 1.5t. Might be a waste of money, but I sleep better at night.
Another note, the people that have tuned their civics fight with knocking at higher than stock boost levels. This makes me assume that this motor is prone to knock. I run 91 in my EX-L 1.5t. Might be a waste of money, but I sleep better at night.
I still base what octane to use on the engines static compression ratio. When I look at the compression ratio for the L series or K series engine. I'm shocked they can actually run 87 octane. The miracle of advanced computer control management systems. With their ability to change the dynamic compression ratio or effective compression ratio. Both are a little different account for different things. They go hand in hand pretty much it's pretty amazing. It wasn't so awful long ago prior to all that you couldn't run a turbo car on 87. Especially not with the static compression ratios we have in the L and K series engines today.
I think the L Series runs at 10.3:1 compression ratio. The naturally aspirated k-series non-turbo is 10.8:1 if I remember correctly. I think 9.5:1 is about the max compression ratio you can run on 87 without the advanced engine computer control management system.
One way these vehicles control their dynamic compression ratio. They do it with variable valve timing or VTEC whatever you want to call it. Some have I- VTEC some just have plain VTC. This is accomplished through a cam phaser but it has many different names. It basically fills up with oil controlled by electric solenoids and passages. It can change the timing of the valves cause the engine to lose compression or create more all controlled by a computer. There are advantages to running higher octane if the system is capable of making use of it. This is just one part of the equation though. Spark timing is also now electronically controlled with a slew of other things. It makes sense for them to make it able to run on varying octane levels though. Kind of like a failsafe because without these systems. If you were to throw 87 in a turbo car with these type of compression ratios minus the advanced engine control management system. That would likely not turn out well at all I don't think you could run boost low enough to make it safe. With 87 being at the pump you know somebody would do it not knowing.
![Image]()
I think the L Series runs at 10.3:1 compression ratio. The naturally aspirated k-series non-turbo is 10.8:1 if I remember correctly. I think 9.5:1 is about the max compression ratio you can run on 87 without the advanced engine computer control management system.
One way these vehicles control their dynamic compression ratio. They do it with variable valve timing or VTEC whatever you want to call it. Some have I- VTEC some just have plain VTC. This is accomplished through a cam phaser but it has many different names. It basically fills up with oil controlled by electric solenoids and passages. It can change the timing of the valves cause the engine to lose compression or create more all controlled by a computer. There are advantages to running higher octane if the system is capable of making use of it. This is just one part of the equation though. Spark timing is also now electronically controlled with a slew of other things. It makes sense for them to make it able to run on varying octane levels though. Kind of like a failsafe because without these systems. If you were to throw 87 in a turbo car with these type of compression ratios minus the advanced engine control management system. That would likely not turn out well at all I don't think you could run boost low enough to make it safe. With 87 being at the pump you know somebody would do it not knowing.
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That’s because the manual transmission referenced in the sedan owners manual is the Si.
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Yeah same here I always put 91 because any turbocharged engine is prone to LSPI and knock and 91 octane helps prevent all of those things so why take a chance ? 🤷🏻‍♂️ just my honest opinion that’s all
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I can tell you that the Honda 1.5T responds to the highest octane. Mine transforms from a maximum of 5 degrees advance under boost when above 5,000 rpm (91 ron) to a maximum of 18 degrees (98 ron). The science says that the increased spark duration builds torque. Mine certainly is 'snappier' in traffic and boost has risen from 18.5 to 19.5. The absolute load value reading says 210 torque, the mass air flow reading says 210 horsepower. Stock flash cold air intake.
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