Rajan Wilcox
Lexus is a luxury car brand with a range of models that use both premium and regular gas. While it may seem natural that luxury vehicles require premium gas, this is not always the case. Lexus models vary in their fuel requirements, with some requiring premium unleaded gasoline with an octane rating of 91 or higher, while others can run on regular unleaded gasoline with an octane rating of 87 or higher. It is important to note that using the wrong type of fuel or mixing regular and premium gas can damage the engine, so Lexus owners should refer to their car's manual for specific fuel requirements.
| Characteristics | Values |
|---|---|
| Do Lexus cars require premium fuel? | Lexus cars do not require premium fuel. However, some models do. |
| Which Lexus models require premium fuel? | GS 350, GS F, GX 360, IS 300, IS 350, LC 500, LX 500H, LS 500, LS 500H, LX 570, NX 300, RC 300, RC 350, RC F, RX 450H, and RX 450hL. |
| What is the recommended fuel type for these models? | Unleaded gasoline with a minimum octane rating of 91 (premium). |
| Which Lexus models do not require premium fuel? | ES 300H, ES 350, NX 300H, RX 350, RX 350L, UX 200, UX 250H, and RX 350 F SPORT. |
| What is the recommended fuel type for these models? | Unleaded gasoline with a minimum octane rating of 87 (regular). |
| Can I mix regular and premium fuel in my Lexus? | No, mixing regular and premium fuel can cause engine damage and void your warranty. |
| What are the fuel efficiency ratings for the Lexus RX 350 models? | RX 350 FWD/RX 350 F SPORT FWD: 20 city/27 highway MPG. RX 350 AWD/RX 350 F SPORT AWD: 19 city/26 highway MPG. |
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What You'll Learn
Lexus RX 350 models from 2012 onwards
It is important to note that any gasoline used in the Lexus RX should not be higher than 15% in ethanol. Gasoline with higher ethanol content, also called flex-fuel, should be avoided as it may cause damage to the vehicle. Lexus also recommends avoiding gasoline that contains methanol or MMT (methylcyclopentadienyl manganese tricarbonyl), a gasoline octane enhancer.
While premium gasoline may not be required for the Lexus RX 350 models from 2012 onwards, there are some benefits to using it. Premium gasoline has a higher octane rating of 91 or higher, which helps resist pre-ignition better than regular unleaded gasoline. This can result in improved performance and mileage, especially when the vehicle is under heavy load or towing during hot weather conditions. Additionally, using premium gasoline can reduce CO2 emissions in these situations.
To make an informed decision, it is recommended to monitor the fuel consumption of your Lexus RX 350 when using both standard and premium unleaded fuel. By comparing the performance and mileage under different fuel types, you can determine whether the benefits of premium gasoline justify the extra expense. However, keep in mind that topping off the tank when filling up with premium gasoline can cause a vapor lock, which interrupts the gas flow to the engine and affects the vehicle's performance.
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Lexus NX models
The Lexus NX is a compact luxury crossover SUV. It was introduced in late 2014 and is positioned between the subcompact UX and the mid-size RX in Lexus' crossover SUV lineup. The NX variants sold in the United States have slightly altered fascias, allowing them to be identified as "light trucks" by the US EPA.
The NX sold over 43,000 units in the US in its first full year of sales, and it was also a success in Europe, where it sold over 28,000 units, of which more than 17,000 were hybrids. This made it Lexus' best-selling model in Europe.
The Lexus NX has various trims and configurations, including:
- NX 250 AWD: This model has a turbocharged inline-four engine that delivers 275 horsepower.
- NX 350h AWD: This is a hybrid option with a 2.5-litre hybrid powertrain that delivers an EPA-estimated 84 MPGe and up to 37 miles of all-electric range.
- NX 450h+ F Sport Handling AWD: This is another hybrid option with up to 37 miles of all-electric range.
In terms of fuel requirements, the Lexus NX 300 is recommended to use premium gasoline with a minimum octane rating of 91. However, the NX 300h can use regular gasoline with an octane rating of 87 or higher. Using gasoline with an octane rating lower than recommended can lead to engine knocking noises and potential engine damage over time.
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Lexus ES 350 models
The Lexus ES 350 is a sleek and luxurious car with a smooth and enjoyable ride. While Lexus is a luxury brand, not all of its models require premium gasoline. The 2022 Lexus ES 350, for instance, is a luxury vehicle that recommends either premium or regular gasoline with an octane rating of 87 or 91. The choice is entirely up to the owner. Similarly, the 2023 Lexus ES 350 needs a minimum octane rating of 87, although you can use premium gasoline if you want.
The 2012-2016 ES 350 models will be able to gain performance benefits from gasoline with an octane rating of 91 or higher. All other engines, including the 2023 model, are designed for 87 octane and will not be able to extract any benefit from higher octane ratings. Using a higher octane rating in these models will cost you more money and will not provide any advantages.
The Lexus ES 350, manufactured between 2006 and 2012, has a gas tank size of 18.5 gallons or 70 litres. The 2012-2018 version has a gas tank size of 17 gallons or 64.35 litres. The ES 350 manufactured from 2019 onwards has a gas tank size of 16 gallons or 60.6 litres. It's important to note that almost all Lexus ES 350 models can use gasoline mixed with a maximum percentage of 15% ethanol. However, the 2011-2013 generation can only take gasoline with a maximum of 10% ethanol. Lexus advises against using methanol in any form since it will damage the fuel system.
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Lexus RX models with all-wheel drive
The Lexus RX is an efficient SUV that provides a luxury experience. While it does not require premium gas, it must receive unleaded gasoline with an octane rating of at least 87. Using gasoline with an octane rating lower than this may lead to engine knocking noises and, in the long run, engine issues.
The Lexus RX can be equipped with all-wheel drive (AWD) technology, which offers benefits such as keeping the vehicle stable and secure in adverse weather conditions and adding performance on dry pavement. The Lexus RX AWD has an EPA-estimated 19 city/26 highway MPG.
The Lexus RX's all-wheel-drive system, DIRECT4, delivers a quick and linear response based on driver input. It uses vehicle wheel speed, acceleration, and steering-angle sensor information to control front-to-rear drive-force-ratio distribution between 100:0 and 0:100. The Active Torque Control AWD system monitors road conditions in real time and automatically shifts engine power between the front and rear axles. During normal driving conditions, 100% of the power is sent to the front wheels for greater efficiency.
The Lexus RX AWD also features a Cornering Control Function, which adjusts the front and rear driving force to improve control and stability. This helps to compensate for understeering or oversteering.
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The impact of using premium fuel in a Lexus that doesn't require it
While Lexus vehicles are upscale and luxurious, not all Lexus models require premium gas. For example, the Lexus RX does not require premium gas but must receive gas with an octane rating of at least 87. Using premium gas in a car that doesn't require it can have several implications.
Firstly, it is important to note that using a higher octane-rated gas in your car will not improve its performance. You will simply be spending additional money. Secondly, using premium gas in a car that doesn't require it can lead to a decrease in gas mileage. This is because premium gas has a higher octane rating, which is an important factor in preventing engine knock or "pinging." Repeated engine knock can speed up wear and tear and cause damage to your engine over time.
However, there may be some benefits to using premium fuel in a car that doesn't require it. In at least one case, a car with a small turbocharged engine returned better fuel economy when running on premium fuel, even though the owner's manual called for regular unleaded gasoline. This improved fuel economy could potentially save you money in the long run. Additionally, years ago, premium gas contained more detergents and other additives to stop carbon deposits. While government regulations have since changed this, it is still possible that premium gas today has more additives that can help protect your engine.
Ultimately, the choice between premium and regular gas should be based on your vehicle's specific needs and the recommendations in your owner's manual. While using premium fuel in a Lexus that doesn't require it may not cause immediate damage, it is not advisable as a long-term solution.
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Frequently asked questions
No, the Lexus RX does not require premium fuel. It has a recommended fuel rating of 87 octane. However, it is recommended that the fuel used in the Lexus RX should not be higher than 15% in ethanol.
Yes, the Lexus NX requires premium unleaded gasoline with an octane rating of 91 or higher. Similar to the Lexus RX, the NX should not be fuelled with gasoline that is higher than 15% in ethanol.
No, not all Lexus models require premium fuel. Some models, such as the Lexus ES 350, use regular gasoline with an octane rating of 87 or lower.
Using the wrong type of fuel in a Lexus can result in engine knocking, which can cause damage to the engine over time. Mixing regular and premium gasoline can also lead to engine detonation and void the warranty of a new Lexus.
