Lackluster V6 on ES350
03-05-19, 11:25 AM
#46
Driver School Candidate
BUT....if an engine is designed to run on 91, then it usually DOES compensate for the lower octane, such as most of the early ES models.
It does this by use of knock sensors and an ECM that can retard the timing slightly.
Here is a chart showing octane requirements of all the models. Note that this chart is from the mothership.
https://lexus2.custhelp.com/app/answ...xus-vehicle%3F
So, for me......who may buy a 2010 thru a 2014........I would assume that the 2010 and 2011 can compensate for the lower octane.
I guess we have to assume the OP has a 6th gen car.?
03-05-19, 02:17 PM
#47
I agree. If an engine is designed to run on 87, running it on 91 won't help and the engine has no compensation.
BUT....if an engine is designed to run on 91, then it usually DOES compensate for the lower octane, such as most of the early ES models.
It does this by use of knock sensors and an ECM that can retard the timing slightly.
Here is a chart showing octane requirements of all the models. Note that this chart is from the mothership.
https://lexus2.custhelp.com/app/answ...xus-vehicle%3F
So, for me......who may buy a 2010 thru a 2014........I would assume that the 2010 and 2011 can compensate for the lower octane.
I guess we have to assume the OP has a 6th gen car.?
BUT....if an engine is designed to run on 91, then it usually DOES compensate for the lower octane, such as most of the early ES models.
It does this by use of knock sensors and an ECM that can retard the timing slightly.
Here is a chart showing octane requirements of all the models. Note that this chart is from the mothership.
https://lexus2.custhelp.com/app/answ...xus-vehicle%3F
So, for me......who may buy a 2010 thru a 2014........I would assume that the 2010 and 2011 can compensate for the lower octane.
I guess we have to assume the OP has a 6th gen car.?
From the 2011 ES 350 Product Information PDF, it also recommends 87 Octane Regular.https://pressroom.toyota.com/article...rticle_id=2662
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lesz (03-05-19)
03-05-19, 02:30 PM
#48
Lead Lap
I do not believe that is really a Lexus web site, look at the URL. it is custhelp.com. Look at a genuine Lexus web site (lexus.com) to find the ES 350 in 2012 uses regular. http://pressroom.lexus.com/releases/...uxury+fuel.htm
From the 2011 ES 350 Product Information PDF, it also recommends 87 Octane Regular.https://pressroom.toyota.com/article...rticle_id=2662
From the 2011 ES 350 Product Information PDF, it also recommends 87 Octane Regular.https://pressroom.toyota.com/article...rticle_id=2662
03-05-19, 04:43 PM
#49
Driver School Candidate
LOL! Not Lexus site?
If there are errors in that chart, please take them up with Lexus.
The other way you can get to that chart is
Go to Lexus.com That's real Lexus, right?
Click on Owners
Click on Resources
Go to FAQS on right and Click on the box called answers and you will be at https://lexus2.custhelp.com/
If there are errors in that chart, please take them up with Lexus.
The other way you can get to that chart is
Go to Lexus.com That's real Lexus, right?
Click on Owners
Click on Resources
Go to FAQS on right and Click on the box called answers and you will be at https://lexus2.custhelp.com/
03-06-19, 06:22 AM
#50
LOL! Not Lexus site?
If there are errors in that chart, please take them up with Lexus.
The other way you can get to that chart is
Go to Lexus.com That's real Lexus, right?
Click on Owners
Click on Resources
Go to FAQS on right and Click on the box called answers and you will be at https://lexus2.custhelp.com/
If there are errors in that chart, please take them up with Lexus.
The other way you can get to that chart is
Go to Lexus.com That's real Lexus, right?
Click on Owners
Click on Resources
Go to FAQS on right and Click on the box called answers and you will be at https://lexus2.custhelp.com/
That is weird, if you leave off the lexus2 it comes up as Oracle.
Last edited by jollick; 03-06-19 at 06:44 AM.
03-06-19, 06:48 AM
#51
I agree. If an engine is designed to run on 87, running it on 91 won't help and the engine has no compensation.
BUT....if an engine is designed to run on 91, then it usually DOES compensate for the lower octane, such as most of the early ES models.
It does this by use of knock sensors and an ECM that can retard the timing slightly.
Here is a chart showing octane requirements of all the models. Note that this chart is from the mothership.
https://lexus2.custhelp.com/app/answ...xus-vehicle%3F
So, for me......who may buy a 2010 thru a 2014........I would assume that the 2010 and 2011 can compensate for the lower octane.
I guess we have to assume the OP has a 6th gen car.?
BUT....if an engine is designed to run on 91, then it usually DOES compensate for the lower octane, such as most of the early ES models.
It does this by use of knock sensors and an ECM that can retard the timing slightly.
Here is a chart showing octane requirements of all the models. Note that this chart is from the mothership.
https://lexus2.custhelp.com/app/answ...xus-vehicle%3F
So, for me......who may buy a 2010 thru a 2014........I would assume that the 2010 and 2011 can compensate for the lower octane.
I guess we have to assume the OP has a 6th gen car.?
2. The ecu may be able to take info from the knock sensors and pull the timing, but that is probably not the best way to run your car if you want long term reliability.
3. Yes, since he posted this in the 6th gen forums, I would assume he has a 6th gen.
03-06-19, 07:28 AM
#52
Lead Lap
In order to properly interpret what Lexus says about fuel grade requirements for a particular vehicle, you need to pay careful attention to what words Lexus is using with regard to fuel grade.
EPA regulations require that manufacturers "recommend" the same fuel grade that was used for testing for emissions, horsepower, and fuel economy. For some vehicles, Lexus has says that 91 octane is "required". That means that there is the potential for performance issues if fuel with lower than 91 octane is used. For other vehicles, Lexus has said the 91 octane fuel is "recommended", but they go on to say that, with 87 octane fuel, the engine will perform properly . That means that the EPA testing was done with 91 octane fuel and that 87 octane fuel will allow the vehicle to perform without issues, but the emissions levels, horsepower, or fuel economy might not be as good as they would be with the use of 91 octane fuel.
I've owned 2 Lexus vehicles for which it said that 91 octane fuel was "recommended" but that 87 octane fuel was satisfactory. Both of the vehicles were never filled with anything other than 87 octane fuel, and they consistently performed without any issues. There may have been a negligible loss of horsepower that I was not likely to notice, but the fuel economy that I got consistently remained at levels that were actually a bit better than the EPA rating.
EPA regulations require that manufacturers "recommend" the same fuel grade that was used for testing for emissions, horsepower, and fuel economy. For some vehicles, Lexus has says that 91 octane is "required". That means that there is the potential for performance issues if fuel with lower than 91 octane is used. For other vehicles, Lexus has said the 91 octane fuel is "recommended", but they go on to say that, with 87 octane fuel, the engine will perform properly . That means that the EPA testing was done with 91 octane fuel and that 87 octane fuel will allow the vehicle to perform without issues, but the emissions levels, horsepower, or fuel economy might not be as good as they would be with the use of 91 octane fuel.
I've owned 2 Lexus vehicles for which it said that 91 octane fuel was "recommended" but that 87 octane fuel was satisfactory. Both of the vehicles were never filled with anything other than 87 octane fuel, and they consistently performed without any issues. There may have been a negligible loss of horsepower that I was not likely to notice, but the fuel economy that I got consistently remained at levels that were actually a bit better than the EPA rating.
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hisstojay (03-07-19)
03-07-19, 11:59 AM
#53
In order to properly interpret what Lexus says about fuel grade requirements for a particular vehicle, you need to pay careful attention to what words Lexus is using with regard to fuel grade.
EPA regulations require that manufacturers "recommend" the same fuel grade that was used for testing for emissions, horsepower, and fuel economy. For some vehicles, Lexus has says that 91 octane is "required". That means that there is the potential for performance issues if fuel with lower than 91 octane is used. For other vehicles, Lexus has said the 91 octane fuel is "recommended", but they go on to say that, with 87 octane fuel, the engine will perform properly . That means that the EPA testing was done with 91 octane fuel and that 87 octane fuel will allow the vehicle to perform without issues, but the emissions levels, horsepower, or fuel economy might not be as good as they would be with the use of 91 octane fuel.
I've owned 2 Lexus vehicles for which it said that 91 octane fuel was "recommended" but that 87 octane fuel was satisfactory. Both of the vehicles were never filled with anything other than 87 octane fuel, and they consistently performed without any issues. There may have been a negligible loss of horsepower that I was not likely to notice, but the fuel economy that I got consistently remained at levels that were actually a bit better than the EPA rating.
EPA regulations require that manufacturers "recommend" the same fuel grade that was used for testing for emissions, horsepower, and fuel economy. For some vehicles, Lexus has says that 91 octane is "required". That means that there is the potential for performance issues if fuel with lower than 91 octane is used. For other vehicles, Lexus has said the 91 octane fuel is "recommended", but they go on to say that, with 87 octane fuel, the engine will perform properly . That means that the EPA testing was done with 91 octane fuel and that 87 octane fuel will allow the vehicle to perform without issues, but the emissions levels, horsepower, or fuel economy might not be as good as they would be with the use of 91 octane fuel.
I've owned 2 Lexus vehicles for which it said that 91 octane fuel was "recommended" but that 87 octane fuel was satisfactory. Both of the vehicles were never filled with anything other than 87 octane fuel, and they consistently performed without any issues. There may have been a negligible loss of horsepower that I was not likely to notice, but the fuel economy that I got consistently remained at levels that were actually a bit better than the EPA rating.
Lexus is OEM of ES!!! So people need to visit Lexus website for adequate and perfect information to avoid misinterpretation or "half-baked" info.
5th Gen ES:
For ES 2007 - 2010: Premium Unleaded - Required
For 2011 - 2012: Regular Unleaded.
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