Premium grade gas w/ ethanol in 2021 GLE 450??
Thread Starter
Senior Member
Joined: Jun 2011
Posts: 356
Likes: 103
2021 GLE 450
Premium grade gas w/ ethanol in 2021 GLE 450??
Was wondering if Flying J or Loves truck stops have premium fuel with no ethanol?
Here in Canada many stations still sell ethanol free premium grade.
I know the owner’s manual says 91 grade with up to 10% ethanol is okay but isn’t ethanol free better for the engine?
We are heading down through the border since the USA have opened land borders in November.
Just thought I’d ask for some opinions.
Toban
Here in Canada many stations still sell ethanol free premium grade.
I know the owner’s manual says 91 grade with up to 10% ethanol is okay but isn’t ethanol free better for the engine?
We are heading down through the border since the USA have opened land borders in November.
Just thought I’d ask for some opinions.
Toban
MBWorld Fanatic!
Joined: May 2018
Posts: 3,391
Likes: 1,040
From: Boise
2024 GMC Canyon Denali..... 2018 Audi SQ5
Was wondering if Flying J or Loves truck stops have premium fuel with no ethanol?
Here in Canada many stations still sell ethanol free premium grade.
I know the owner’s manual says 91 grade with up to 10% ethanol is okay but isn’t ethanol free better for the engine?
We are heading down through the border since the USA have opened land borders in November.
Just thought I’d ask for some opinions.
Toban
Here in Canada many stations still sell ethanol free premium grade.
I know the owner’s manual says 91 grade with up to 10% ethanol is okay but isn’t ethanol free better for the engine?
We are heading down through the border since the USA have opened land borders in November.
Just thought I’d ask for some opinions.
Toban
More often it’s an occasional Phillips 66 station or a Card Lock Commercial, maybe a Chevron. Resort towns that are frequented by Snowmobiles or Jet Boats are another possibility. You might try a search along your route but will probably find it tough to find enough of them. There’s an App called Pure Gas that can help you locate a source but it’s not always accurate. https://apps.apple.com/us/app/pure-gas/id454559068
Thread Starter
Senior Member
Joined: Jun 2011
Posts: 356
Likes: 103
2021 GLE 450
Okay Ron, thanks for your reply.
I guess premium gas with ethanol is what I will have to buy without running around all over trying to find a station and wasting time.
I guess the majority of vehicles in North America are running on regular 87 grade with ethanol these days so since the car won't be sitting very long it should be okay. We have another car which will be sitting for 5 months in my garage. I have started to fill this car with non ethanol 91 grade so when we leave it will have the tank full. I will also be putting in a gasoline stabilizer.
Toban
I guess premium gas with ethanol is what I will have to buy without running around all over trying to find a station and wasting time.
I guess the majority of vehicles in North America are running on regular 87 grade with ethanol these days so since the car won't be sitting very long it should be okay. We have another car which will be sitting for 5 months in my garage. I have started to fill this car with non ethanol 91 grade so when we leave it will have the tank full. I will also be putting in a gasoline stabilizer.
Toban
Member
Joined: Jul 2021
Posts: 121
Likes: 29
From: Northshore of Lake Travis, TX
2022 GLE 450/2020 Gen 2 Raptor/few others
But also remember that ethanol is more knock resistant. So many (most) tuners would rather see you run fuels containing ethanol. The most popular Raptor tuner flat out suggests it. Its why the big boys run E85 on the street. However, you may get better gas mileage with non-ethanol fuels because although the stuff will let you run more timing (or have a larger window of safety WITH that timing), it does contain about 30% less energy. Therefore you have to use more. It's main benefit to boosted folks though is how much timing you can run. All modern vehicles worth mentioning are also designed to run at least the E10 at most pumps in the United States.
Member
Joined: Jul 2021
Posts: 121
Likes: 29
From: Northshore of Lake Travis, TX
2022 GLE 450/2020 Gen 2 Raptor/few others
Okay Ron, thanks for your reply.
I guess premium gas with ethanol is what I will have to buy without running around all over trying to find a station and wasting time.
I guess the majority of vehicles in North America are running on regular 87 grade with ethanol these days so since the car won't be sitting very long it should be okay. We have another car which will be sitting for 5 months in my garage. I have started to fill this car with non ethanol 91 grade so when we leave it will have the tank full. I will also be putting in a gasoline stabilizer.
Toban
I guess premium gas with ethanol is what I will have to buy without running around all over trying to find a station and wasting time.
I guess the majority of vehicles in North America are running on regular 87 grade with ethanol these days so since the car won't be sitting very long it should be okay. We have another car which will be sitting for 5 months in my garage. I have started to fill this car with non ethanol 91 grade so when we leave it will have the tank full. I will also be putting in a gasoline stabilizer.
Toban
MBWorld Fanatic!
Joined: May 2018
Posts: 3,391
Likes: 1,040
From: Boise
2024 GMC Canyon Denali..... 2018 Audi SQ5
But also remember that ethanol is more knock resistant. So many (most) tuners would rather see you run fuels containing ethanol. The most popular Raptor tuner flat out suggests it. Its why the big boys run E85 on the street. However, you may get better gas mileage with non-ethanol fuels because although the stuff will let you run more timing (or have a larger window of safety WITH that timing), it does contain about 30% less energy. Therefore you have to use more. It's main benefit to boosted folks though is how much timing you can run. All modern vehicles worth mentioning are also designed to run at least the E10 at most pumps in the United States.
The energy density of Ethanol is much lower hence the higher the Ethanol content the lower the MPG’s. E 85 isn’t practical for everyday use unless your vehicle supports E85 and you can live with more frequent trips to the pump on a long trip.
Member
Joined: Jul 2021
Posts: 121
Likes: 29
From: Northshore of Lake Travis, TX
2022 GLE 450/2020 Gen 2 Raptor/few others
Actually Pure Ethanol has a higher Octane rating of 100 but 91 Ethanol (E10) & 91 NonE are no different in detonation qualities, that’s what the Octane measures. 91 E10 combines 10% at 100 octane with lower Octane gas to bump it to 91. Since 91 NonE requires more complicated refining to raise the Octane it’s arguably ia better quality fuel, IMO.
The energy density of Ethanol is much lower hence the higher the Ethanol content the lower the MPG’s. E 85 isn’t practical for everyday use unless your vehicle supports E85 and you can live with more frequent trips to the pump on a long trip.
The energy density of Ethanol is much lower hence the higher the Ethanol content the lower the MPG’s. E 85 isn’t practical for everyday use unless your vehicle supports E85 and you can live with more frequent trips to the pump on a long trip.
Quick side note... not all E10/E50/E85 etc is necessarily what it is purported to be. There are variances area to area vendor to vendor regardless of any regulation. Those who know this check or run sophisticated hardware/software to adjust for such.
As to toban's original question, it does not matter for his daily driver.
Last edited by Zeusmotorworks; Oct 24, 2021 at 09:14 AM.
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