What fuel grade are you using in your RX350?
#273
Hi everyone, first time Lexus owner. Our 2021 RX 350 F-Sport is arriving this weekend.
Question: Is everyone filling up your RX 350 with Regular gas? Is anyone opting for Premium gas, or is that just a waste of money?
If Regular gas is the only gas needed, we'll be happy to save the extra $$$. Just making sure we're not leaving any potential performance benefit with Premium gas.
Thanks!
Question: Is everyone filling up your RX 350 with Regular gas? Is anyone opting for Premium gas, or is that just a waste of money?
If Regular gas is the only gas needed, we'll be happy to save the extra $$$. Just making sure we're not leaving any potential performance benefit with Premium gas.
Thanks!
The short version is your car can run on regular. Most data on the topic will point to the fact that you may experience a tiny drop in hp and a tiny drop in MPG IF your car recommends 91 and you use less. Whether you do or not depends on a lot of other factors - where you drive, how you drive, etc. The differences might not even be noticeable. Best advice I can give is try 2-3 tanks on one, then 2-3 tanks on the other when you are able to keep the driving conditions fairly similar and just see for yourself what you like and go with that.
I've done that and I do notice a difference with premium in my 450h, so I go with that (and as previously mentioned, in my manual 91 is recommended, but 87 is the minimum). Others who can't tell a difference or drive enough where the cost matters use regular.
#274
Hi everyone, first time Lexus owner. Our 2021 RX 350 F-Sport is arriving this weekend.
Question: Is everyone filling up your RX 350 with Regular gas? Is anyone opting for Premium gas, or is that just a waste of money?
If Regular gas is the only gas needed, we'll be happy to save the extra $$$. Just making sure we're not leaving any potential performance benefit with Premium gas.
Thanks!
Question: Is everyone filling up your RX 350 with Regular gas? Is anyone opting for Premium gas, or is that just a waste of money?
If Regular gas is the only gas needed, we'll be happy to save the extra $$$. Just making sure we're not leaving any potential performance benefit with Premium gas.
Thanks!
#278
Does anyone else find it odd the 2021 manual says "use 87 or higher"? Using a higher octane fuel than the engine is designed for doesn't do anything. It's a complete waste. Either the engine was designed to prefer higher or it doesn't. I realize modern engines basically detect what's being used and adjust accordingly, but a car's MPG and HP ratings would be based assuming some kind of fuel. If the ratings were based on premium, they would recommend premium. If they were based on regular, then using higher octane fuel does nothing for you.
Saying "or higher" seems strange to me. I want to know what the engine was designed for and what fuel is assumed when calculating published MPG and HP ratings. Fine if I can use less, but being so vague seems odd.
Saying "or higher" seems strange to me. I want to know what the engine was designed for and what fuel is assumed when calculating published MPG and HP ratings. Fine if I can use less, but being so vague seems odd.
#279
Does anyone else find it odd the 2021 manual says "use 87 or higher"? Using a higher octane fuel than the engine is designed for doesn't do anything. It's a complete waste. Either the engine was designed to prefer higher or it doesn't. I realize modern engines basically detect what's being used and adjust accordingly, but a car's MPG and HP ratings would be based assuming some kind of fuel. If the ratings were based on premium, they would recommend premium. If they were based on regular, then using higher octane fuel does nothing for you.
Saying "or higher" seems strange to me. I want to know what the engine was designed for and what fuel is assumed when calculating published MPG and HP ratings. Fine if I can use less, but being so vague seems odd.
Saying "or higher" seems strange to me. I want to know what the engine was designed for and what fuel is assumed when calculating published MPG and HP ratings. Fine if I can use less, but being so vague seems odd.
Lexus also knows the reticence of northamerican buyers to use premium so that's why there is that writing, the computer can only compensate so much.
This is also a question of price vs cost as by using premium one gets other benefits which will result in lower maintenance cost, but if only keeping the vehicle for 2-3 years there would be be no ROI so that's moot.
#280
Does anyone else find it odd the 2021 manual says "use 87 or higher"? Using a higher octane fuel than the engine is designed for doesn't do anything.
Saying "or higher" seems strange to me. I want to know what the engine was designed for and what fuel is assumed when calculating published MPG and HP ratings. Fine if I can use less, but being so vague seems odd.
Saying "or higher" seems strange to me. I want to know what the engine was designed for and what fuel is assumed when calculating published MPG and HP ratings. Fine if I can use less, but being so vague seems odd.
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Cocal (04-15-21)
#281
Me neither. Those crafty engineers have used VVT, dual port fuel injection, and electronic ignition all together to get this engine to burn the 87 octane with no spark knock, probably demanded by the marketing department. I'll bet their reported mpg, hp, and torque figures are achieved using considerably higher octane fuel.
#282
If their published stats are based on higher octane, I would expect the manual to say what mine does (2016 450h).
Select premium unleaded gasoline with an octane rating of 91 (Research Octane Number 96) or higher required for optimum engine performance. If 91 octane cannot be obtained, you may use unleaded gasoline with an octane rating as low as 87 (Research Octane Number 91). Use of unleaded gasoline with an octane rating lower than 91 may result in engine knocking and significantly reduced performance. Persistent knocking can lead to engine damage and should be corrected by refueling with higher octane unleaded gasoline.
It's just weird they talk around it. Seems to me they let the marketing department spend a bit too much time with the manual....
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dibl (04-15-21)
#283