Gas MPG

[BillZ]

Below are two more articles, both from AAA, regarding the use of premium vs regular gas. I had previously posted a video link from Consumer Reports testing of the issue on a vehicle where premium was "recommended" but not "required" as is the case with the GV80 (at least the 3.5 -- I haven't reviewed the manual for 2.5). They found no benefit in their testing either in performance or fuel consumption. The AAA articles suggest there may be minor benefit to using premium in what might be termed "high load" situations such as trailer towing or high speed and high acceleration scenarios (racing?), but not enough in regular driving to justify the higher cost. Nowhere is it suggested that using premium provides any protection or longevity to engines in cars where it is only recommended but not required.

I drove my previous Genesis for 6 years using top-tier regular and the engine was like new when I traded it for my GV80. I never had an issue with performance. True, I never raced another G80 3.8. My personal take (you are entitled to yours) is that unless you plan on racing or heavy towing, you and the car will be perfectly using top-tier regular. So will your wallet.

U.S. Drivers Waste $2.1 Billion Annually on Premium Gasoline

AAA testing shows no benefit to splurging on premium fuel when not required by the manufacturer

newsroom.aaa.com

Don’t Be Fueled: Premium Not Always Worth the Price

AAA tests show premium fuel benefits some vehicles, but comes at a high cost

newsroom.aaa.com

 

[koala]

Bill, it is important to note that 91 is not "required" in any modern vehicle.

"AAA’s tests reveal that there is no benefit to using premium gasoline in a vehicle that requires regular fuel" - that is the key takeaway.

People well and truly are throwing away their money in that specific case... but not on a vehicle designed for, and with an engine map for a higher grade of fuel.

 

[Jhon]

If you used premium in the generator the lights would be brighter and the 6 o'clock news would have less politics.

Living here in the lightning capital of the world, the one thing I have learned about generators is; some led lights don't like them. They want pure electricity and don't like minor fluctuations in voltage. I don't know too much about how they work and their circuitry, but I know my 3 1/5 ton 50 amp 240 volt Air Conditioner doesn't give a crap, it runs just fine on a generator.

 

[Speeder]

Bill, it is important to note that 91 is not "required" in any modern vehicle.

"AAA’s tests reveal that there is no benefit to using premium gasoline in a vehicle that requires regular fuel" - that is the key takeaway.

People well and truly are throwing away their money in that specific case... but not on a vehicle designed for, and with an engine map for a higher grade of fuel.

It is required in my 2016 Cadillac, as stated in the manual, Page 280. That is a modern vehicle, right?

If the vehicle has the 3.6L V6 twin
turbo engine, use premium
unleaded gasoline meeting ASTM
specification D4814 with a posted
octane rating of 91 or higher. If the
octane is less than 91, damage to
the engine may occur and may void
the vehicle warranty. If heavy
knocking is heard when using
gasoline rated at 91 octane or
higher, the engine needs service.

 

[DaleNet]

Guys. This has been debated on all the sub-forums for all the vehicles. To be honest, it is all a personal choice. If you want to use high test or feel it does give you better performance or fuel milage then do that. If you use lower octane and are fine with that then so be it. The engines can for sure handle it.

The one thing you must do is use a top tier gas company that provides the additives for these new (especially turbo) engines.

 

[koala]

It is required in my 2016 Cadillac, as stated in the manual, Page 280. That is a modern vehicle, right?

If the vehicle has the 3.6L V6 twin
turbo engine, use premium
unleaded gasoline meeting ASTM
specification D4814 with a posted
octane rating of 91 or higher. If the
octane is less than 91, damage to
the engine may occur and may void
the vehicle warranty. If heavy
knocking is heard when using
gasoline rated at 91 octane or
higher, the engine needs service.

GM has really specific anti-consumer wording in their user manuals. It's easier for them to shift the blame to the customer.

You can absolutely run 87 in any modern vehicle with an ECU and a knock sensor. All I'm saying is I never would personally, I'd run whatever the highest octane the vehicle has a map for.

 

[Jhon]

GM has really specific anti-consumer wording in their user manuals. It's easier for them to shift the blame to the customer.

You can absolutely run 87 in any modern vehicle with an ECU and a knock sensor. All I'm saying is I never would personally, I'd run whatever the highest octane the vehicle has a map for.

Consumer reports is so biased toward anything green.
The GV80 will always be lowly rated because of the gas mileage and they claim that Genesis is one of the most non green manufacturers.
I use Consumer reports as a guide. Not a bible like a lot of people do. I want a washing machine that cleans my clothes not one that saves me a gallon of water for each load.
I just wish they would show the breakdown on how they get their total points like car magazines do. I will guarantee, that they weigh the greenness more most other things.
When your buying a large luxury car, gas mileage is not the most important thing on your list.
I just don't know why they hide how they arrive at their rankings. (Well I do know, they want to promote green and know a lot of people would ignore it.)

 

[EdP]

Consumer reports is so biased toward anything green.
The GV80 will always be lowly rated because of the gas mileage and they claim that Genesis is one of the most non green manufacturers.
I use Consumer reports as a guide. Not a bible like a lot of people do. I want a washing machine that cleans my clothes not one that saves me a gallon of water for each load.

Been so long ago i forget the details. We bought a particular appliance because of a feature we liked. Two month later CR downgraded the ranking because it had that "unneeded" feature.

 

[23GreenG70]

Definitely agree just traded my 2017 G80 AWD base car with 69k not one issue on non top tier fuel. Used mostly BJ gas and it drive well. Tried premium experiment with Mobile twice felt no differences and the gas milesge did not improve. Going to going to go the same route on my new to me G70 2.0 AWD unless there is proof I get better performance and gas mileage.

Below are two more articles, both from AAA, regarding the use of premium vs regular gas. I had previously posted a video link from Consumer Reports testing of the issue on a vehicle where premium was "recommended" but not "required" as is the case with the GV80 (at least the 3.5 -- I haven't reviewed the manual for 2.5). They found no benefit in their testing either in performance or fuel consumption. The AAA articles suggest there may be minor benefit to using premium in what might be termed "high load" situations such as trailer towing or high speed and high acceleration scenarios (racing?), but not enough in regular driving to justify the higher cost. Nowhere is it suggested that using premium provides any protection or longevity to engines in cars where it is only recommended but not required.

I drove my previous Genesis for 6 years using top-tier regular and the engine was like new when I traded it for my GV80. I never had an issue with performance. True, I never raced another G80 3.8. My personal take (you are entitled to yours) is that unless you plan on racing or heavy towing, you and the car will be perfectly using top-tier regular. So will your wallet.

U.S. Drivers Waste $2.1 Billion Annually on Premium Gasoline

AAA testing shows no benefit to splurging on premium fuel when not required by the manufacturer

newsroom.aaa.com

Don’t Be Fueled: Premium Not Always Worth the Price

AAA tests show premium fuel benefits some vehicles, but comes at a high cost

newsroom.aaa.com

 

[23GreenG70]

Guys. This has been debated on all the sub-forums for all the vehicles. To be honest, it is all a personal choice. If you want to use high test or feel it does give you better performance or fuel milage then do that. If you use lower octane and are fine with that then so be it. The engines can for sure handle it.

The one thing you must do is use a top tier gas company that provides the additives for these new (especially turbo) engines.

Sounds reasonable to me as I’ve tried premium vs regular and have seen no difference in either gas mileage or performance. Truthfully have mainly used BJ gas still no issues but I don’t think it is a top tier gas such as Costco. Around here difference between top tier and BJ is about 30 cents per gallon. Would switch so I’ll start looking for an alternative.

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[23GreenG70]

Hello! I LOVE my 2023 Genesis GV80 3.5T Prestige. I just bought her on Saturday. I am absolutely floored that I’ve driven only 200 miles and my gas tank is almost empty. What is happening here?!!!!!! I am coming from a 2020 highlander-15 gallon tank and I got almost 9 days out of the tank or about 350miles. My genesis has a 21 gallon tank. I understand this is a twin turbo v6 but this can’t be real! I have read I should get average 20mpg but I’m getting closer to 12-14mpg. I drive in eco and I’m not driving like I stole it! HELP!

It will improve but both of my friends with your engine are suffering the same fate as you. Luv the car and hate the gas mileage. My 17 G80 non turbo 3.8 was extraordinarily efficient BTW.

 

[23GreenG70]

Are you aware of how gas is refined and shipped? Difference between brands? OK. the difference is in the advertising, not the product.

All gasoline is refined to the same specifications for either regular or premium grade and goes into a pipeline or tanker to take it to a port tank farm. The delivery truck takes on the proper octane and if it is a Top Tier they add the additives in the tanker to be mixed. Then he makes a delivery and the same exact product may go to Shell, Marathon, or any of the stations using Top Tier.

Yes but can I assume it to be random selection to add the additives then.

 

[2450NW]

Hi Julie,

I have about 15 months and 9,000 miles on my GV80 3.5L Prestige. I live at an altitude of around 4,000', and take occasional 3-8 hour trips to near-sea level elevations. I drive in ECO mode, and I use premium-grade fuel to minimize any knocking. I have found that mileage varies with the miles on the GV80 and the type of trip (i.e., in-town/local or long trips). This is not unexpected: wearing-in smoothes factory imperfections with time and cross-countries minimize the stop-idle-accelerate starts that eat away at mileage.

On cross-countryy trips, I tend to engage the speed control as often as safety permits, as I've found that--for long trips, at least--mileage is improved when the accelerator pedal is not being "pumped", however slightly, as even the steadiest driver tends to do.

As a retired physicist, I tend to get a bit anal about 'data' and in this case, I calculate my mileage at each fill-up. The plot below shows the mileage I've recorded over these last 18 months. The higher mileage data show the cross-country trips and the lower mileage data is the in-town driving.

If any of you guys keep records in a similar way, it would be interesting to compare YOUR mileage.

 

[BillZ]

I get similar results using regular top-tier gas. I bet that highest tankful was on a long run with a tailwind!

 

[2450NW]

Hi Julie,

I have about 15 months and 9,000 miles on my GV80 3.5L Prestige. I live at an altitude of around 4,000' and I take occasional 3-8 hour trips to near-sea level elevations. I drive in ECO mode. I have found that the [eyeball-averaged mileage varies with the miles on the GV80 and the type of trip (i.e., in-town/local or long trips). This is not unexpected.

On cross-county trips, I tend to engage the speed control as often as safety permits, as I've found that--for long trips, at least--mileage is improved when the accelerator pedal is not being "pumped", however slightly, as even the steadiest driver tends to do.

As a retired physicist, I tend to get a bit anal about 'data' and in this case I calculate my mileage at each fill-up. The plot below shows the mileage I've recorded over these last 18 months. The higher mileage data show the cross-country trips and the lower mileage data is the in-town driving.

If any of you guys keep records in a similiar way, it would be interesting to compare mileage.

 

[Speeder]

Hi Julie,

I have about 15 months and 9,000 miles on my GV80 3.5L Prestige. I live at an altitude of around 4,000', and take occasional 3-8 hour trips to near-sea level elevations. I drive in ECO mode, and I use premium-grade fuel to minimize any knocking. I have found that mileage varies with the miles on the GV80 and the type of trip (i.e., in-town/local or long trips). This is not unexpected: wearing-in smoothes factory imperfections with time and cross-countries minimize the stop-idle-accelerate starts that eat away at mileage.

On cross-countryy trips, I tend to engage the speed control as often as safety permits, as I've found that--for long trips, at least--mileage is improved when the accelerator pedal is not being "pumped", however slightly, as even the steadiest driver tends to do.

As a retired physicist, I tend to get a bit anal about 'data' and in this case, I calculate my mileage at each fill-up. The plot below shows the mileage I've recorded over these last 18 months. The higher mileage data show the cross-country trips and the lower mileage data is the in-town driving.

If any of you guys keep records in a similar way, it would be interesting to compare YOUR mileage.

 

[jholland78]

Hi, new here. I just purchased a CPO 2022 GV80 3.5 Prestige with only 9k miles in it last month. I'm only averaging 9.5 mpg calculated by dividing the miles driven since refilling by the gallons needed to top off again (did this 2x with the same results), but the dash display says I'm getting 14.2mpg. Does it need to be calibrated or something? There's no way I'm keeping this car if I'm only getting 9.5mpg. I use 91 premium from Chevron and drive half city and half freeway here in Las Vegas. My 2001 Tahoe actually got 14mpg but that's a 5.3L V8. Please help.

 

[Speeder]

Hi, new here. I just purchased a CPO 2022 GV80 3.5 Prestige with only 9k miles in it last month. I'm only averaging 9.5 mpg calculated by dividing the miles driven since refilling by the gallons needed to top off again (did this 2x with the same results), but the dash display says I'm getting 14.2mpg. Does it need to be calibrated or something? There's no way I'm keeping this car if I'm only getting 9.5mpg. I use 91 premium from Chevron and drive half city and half freeway here in Las Vegas. My 2001 Tahoe actually got 14mpg but that's a 5.3L V8. Please help.

Do you have super low tire air pressure or an amazingly heavy foot? That's bad MPG!

 

[Ike Arumba]

Hi, new here. I just purchased a CPO 2022 GV80 3.5 Prestige with only 9k miles in it last month. I'm only averaging 9.5 mpg calculated by dividing the miles driven since refilling by the gallons needed to top off again (did this 2x with the same results), but the dash display says I'm getting 14.2mpg. Does it need to be calibrated or something? There's no way I'm keeping this car if I'm only getting 9.5mpg. I use 91 premium from Chevron and drive half city and half freeway here in Las Vegas. My 2001 Tahoe actually got 14mpg but that's a 5.3L V8. Please help.

Check your engine air filters (I think the 3.5 uses two). I was getting crazy low mileage in one of my cars a couple years ago, and it was a clogged filter.

 

[jholland78]

Do you have super low tire air pressure or an amazingly heavy foot? That's bad MPG!

Tires are at 34 front and 36 rear and I don't drive with a heavy foot very often. Usually drive the speed limit and I'm not gunning it at stop lights or anything like that. Only did that a couple of times the first few days I had it to feel the power of those turbos...my son and I agree that it throws you back in your seat just as much as a Tesla does.