Regular vs Super Unleaded

[Al Jet]

I wanted to see if anyone has noticed a big difference in the fuel economy of your 2015 Genesis. I know the 5.0 can use regular or premium gas (I don't know about the V6), and there is a small sacrifice in HP and torque using regular. But just looking at the fuel economy, has anyone tried to see what the difference is between using 87 octane vs 92/93 octane? There is a difference of about 40 cents between 87 and 93, which is about $6 dollars per tank. I wonder if the fuel economy gain makes up for the difference in cost of fuel. I have only used 1 tank of 93 octane gas, and did not notice any big change in fuel economy.

Also, did anyone notice a big difference in performance between 87 and 93 octane gas? I'm having a blast driving the car, regardless of what type of gas I use.

 

[Mark_888]

I wanted to see if anyone has noticed a big difference in the fuel economy of your 2015 Genesis. I know the 5.0 can use regular or premium gas (I don't know about the V6), and there is a small sacrifice in HP and torque using regular. But just looking at the fuel economy, has anyone tried to see what the difference is between using 87 octane vs 92/93 octane? There is a difference of about 40 cents between 87 and 93, which is about $6 dollars per tank. I wonder if the fuel economy gain makes up for the difference in cost of fuel. I have only used 1 tank of 93 octane gas, and did not notice any big change in fuel economy.

Also, did anyone notice a big difference in performance between 87 and 93 octane gas? I'm having a blast driving the car, regardless of what type of gas I use.

It's safe to say that there is some difference in MPG, especially since Hyundai did the EPA MPG test using premium. But probably not enough difference in MPG to make up for the price difference at the pump for the two octane levels.

 

[pusaterkm]

Paid for 420 HP because I wanted 420 HP. If I was worried about saving $6 on a tank of gas I would have bought a Prius. And still, I am getting 27 - 28 MPG on my highway runs.

 

[palloverspec]

Hey fellas. I have a 2012 R-Spec. Drove to Canada last week, and got 27.9 miles to the gallon. Oh yeah! I use 93 octane. Don't mind paying the extra 6 bucks per tank.

I have noticed that there is less carbon build up on the tail pipes when I use higher octane gas. I was once told by a petrolium engineer, that higher octane gas burns colder than lower octane and produces less carbon emissions. Just somethng I was told, not stating he was correct. But I have noticed less carbon build up when I switched from 87 to 93.

 

[Ernie3647]

I wanted to see if anyone has noticed a big difference in the fuel economy of your 2015 Genesis. I know the 5.0 can use regular or premium gas (I don't know about the V6), and there is a small sacrifice in HP and torque using regular. But just looking at the fuel economy, has anyone tried to see what the difference is between using 87 octane vs 92/93 octane? There is a difference of about 40 cents between 87 and 93, which is about $6 dollars per tank. I wonder if the fuel economy gain makes up for the difference in cost of fuel. I have only used 1 tank of 93 octane gas, and did not notice any big change in fuel economy.

Also, did anyone notice a big difference in performance between 87 and 93 octane gas? I'm having a blast driving the car, regardless of what type of gas I use.

I would advise you to look at the thread for Top Tier gas you might find that interesting. I certainly did.

 

[Alwaysforward]

Paid for 420 HP because I wanted 420 HP. If I was worried about saving $6 on a tank of gas I would have bought a Prius. And still, I am getting 27 - 28 MPG on my highway runs.

I agree and this is great news on the highway mileage you are getting. Is this with it set in the ECNO mode?

 

[brfatal]

Hey fellas. I have a 2012 R-Spec. Drove to Canada last week, and got 27.9 miles to the gallon. Oh yeah! I use 93 octane. Don't mind paying the extra 6 bucks per tank.

I have noticed that there is less carbon build up on the tail pipes when I use higher octane gas. I was once told by a petrolium engineer, that higher octane gas burns colder than lower octane and produces less carbon emissions. Just somethng I was told, not stating he was correct. But I have noticed less carbon build up when I switched from 87 to 93.

Is that based on the computer calculations or actual gas usage?

I drove 2,500 from the Mid Atlantic, though eastern Canada and back in my R-Spec. Cruise control on the entire way I averaged ~20-21 mpg on each tank on premium based on actual gas usage.

 

[TxGenesis01]

What speed are you guys traveling at? Here in Texas hwy speed limit are 75 mph and with the V6 I average 28mpg. If I hit 80 mph it's around 26-27.

I highly doubt a V8 can get 27 mpg at 75 mph. Maybe at 60mph.

 

[scottdk]

What speed are you guys traveling at? Here in Texas hwy speed limit are 75 mph and with the V6 I average 28mpg. If I hit 80 mph it's around 26-27.

I highly doubt a V8 can get 27 mpg at 75 mph. Maybe at 60mph.

I have no problem getting 28-30 mpg on the highway at 72 mph using the cruise. I only have the tiny 4.6L though

 

[palloverspec]

Is that based on the computer calculations or actual gas usage?

I drove 2,500 from the Mid Atlantic, though eastern Canada and back in my R-Spec. Cruise control on the entire way I averaged ~20-21 mpg on each tank on premium based on actual gas usage.

It is what the computer was reading out. I also noticed my gas consumption was less based on me filling up the car. Just one fill up.

I drove 560 miles from MD to Oakville. Started off with a full tank of gas (93 Octane) and filled up at the 300 mile driven mark and drove the rest of the way.

Computer stated 27.9 miles/gal with an average speed of 60 mph. Granted I was going about 75 to 80 in some places.

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[Jackzilla]

Most significant improvement that you can get is with pure, 93 octane gasoline, minus the 10% Ethanol that you get at nearly all stations today. Pure, 100% gasoline is good for a 3 - 4 % improvement in fuel mileage over the E-10 (10% Ethanol) that we're forced to buy.

Our previous car, a 2006 Acura RL burned only 93 octane and picked up 3 MPG when running on 100% gasoline (normal average was 27 MPG on the road w/E-10) Cost however was really up there -- a good 20 - cents over the price of E-10, 93 octane. The improved fuel milage barely covered to extra cost. However, there was a significant improvement in engine responsiveness running on 100% gasoline. Might be worth it to some. You can find stations selling 100% gasoline at this link:http://pure-gas.org/

 

[pusaterkm]

I agree and this is great news on the highway mileage you are getting. Is this with it set in the ECNO mode?

Yes. Econo mode, which is still very responsive when you need to blow by somebody. But driving gently at speeds around 70-75 with some minor "hypermiling" IE putting it in neutral on a long downhill stretch.I run Shell premium and no Sams Club or Grocery Store gas. Even if I drive more aggressively I can get 23-24 on the highway. Now my city/highway average is about 22 because like I stated earlier I wanted 420 HP and I use it often. But its nice to know that if I want the higher MPG I can get it. I could get the same out of the 2011 4.6 that I traded in.

 

[bobshine]

It is what the computer was reading out. I also noticed my gas consumption was less based on me filling up the car. Just one fill up.

I drove 560 miles from MD to Oakville. Started off with a full tank of gas (93 Octane) and filled up at the 300 mile driven mark and drove the rest of the way.

Computer stated 27.9 miles/gal with an average speed of 60 mph. Granted I was going about 75 to 80 in some places.

I have noticed about a 2-3 MPG difference between the car computer and calculating the old fashion way. This holds true for both my 3.8 V6 sedan and coupe. The car computer gives higher mileage than what you really get.

 

[bufub]

I routinely get 28mpg in my 2011 4.6L. That's running 75-78mph on I-95 from Virginia to NY.

 

[marinakorp]

On a trip from the Poconos last weekend, my Gf took the gEnny, while I towed the camper behind my motorcycle..

I got in the care on monday and the MPG calcs were 30.1 on my 4.6

She passed me on the bike, and I was doing 70 or so... I assume she hit jigh 70's as an average.


best I ever got commuting to work (no traffic, 75 - 80 MPH) was 27