Genesis 3.8L RWD MPG?

[carltonsisk]

3.8 RWD Tech. 7K miles. Last tank of regular per the car computer was 25.1 MPG. I would guess 50% city, 50% hwy. Use smart cruise on the hwy most of the time. Last car was G37X that would avg 21/22 MPG on same drive so I am happy.

 

[xsolara]

I have AWD and with just over 2000 miles I'm getting between 25 and 28 MPG in mixed driving. I keep very good records and I check every 6 months to verify MPG (miles driven and gas consumed)
I noticed that Fuelly doesn't differentiate between standard or AWD...only 3.8 & 5.0

 

[Genentec]

about how many miles are u getting per tank fill up, im usually at 300 miles per 17 gallon fill up on the 5.0.

what about u 3.8 rwd guya, how many miles per fill up

 

[RN2X]

Just got 427 on the last tank

 

[RN2X]

17.72 gallons to fill it back up

 

[Genentec]

right but whats the average ? did u go on a long highway trip with no traffic ? or is that mixed hwy city?

the other guy on his fuelly log is coming in around 20 to 21 mpg mixed hwy city and thats about what i was getting on my former 3.8 the first 1500 miles

17.72 gallons to fill it back up

 

[RN2X]

That is about my average ~24mpg. I do a lot of highway driving and can see 29 avg on a tank that is all highway.

 

[jcperform]

8,000 miles on 2015 3.8 'Tech' sedan,...average mpg display is mostly 1.5 to 2 mpg optimistic re actual calc. SO averages 22- 24 around town. I have gotten actual 32 mpg on regular fuel on highway trips with careful driving, keeping speeds under 65 mph. On carefree highway trips driving 70 to 85 mph the worst I have averaged in east coast mountains is 27. My normal around town is @ 24 mpg actual calculated,...mostly highway under 80 mph gets 28-30 actual calculated.
Overall very impressed/happy with this car.

 

[xsolara]

about how many miles are u getting per tank fill up, im usually at 300 miles per 17 gallon fill up on the 5.0.

what about u 3.8 rwd guya, how many miles per fill up

2015 3.8 has a 20+ gallon tank

 

[amartz]

keeping speeds under 65 mph.

Well that certainly take all the fun out of it. Unless you are on the Dragon!!

______________________________

Help support this site so it can continue supporting you!

 

[jarred52]

I just completed a 1,300 mile road trip from Dallas to Birmingham. Two people in the car and fully loaded back seat and trunk. I got 29.7 mpg calculated with actual gallons used for the entire trip. I drive 75 on the Interstate using cruise control when possible. I also increase my cold tire pressure to 35 psi prior to any road trip.

As to use of premium vs. regular top tier gasoline, I can not discern a difference; if there is, it is less than .5 mpg. Certainly nothing to justify the 15-20% difference in price.

The Genny gets almost exactly one mpg less than my previous 2013 Avalon driven in the same manner. As the Genny weighs about 500 pounds more, I think this is a excellent return.

 

[MagicRobert]

I just completed a 1,300 mile road trip from Dallas to Birmingham. Two people in the car and fully loaded back seat and trunk. I got 29.7 mpg calculated with actual gallons used for the entire trip. I drive 75 on the Interstate using cruise control when possible. I also increase my cold tire pressure to 35 psi prior to any road trip.

As to use of premium vs. regular top tier gasoline, I can not discern a difference; if there is, it is less than .5 mpg. Certainly nothing to justify the 15-20% difference in price.

The Genny gets almost exactly one mpg less than my previous 2013 Avalon driven in the same manner. As the Genny weighs about 500 pounds more, I think this is a excellent return.

I get almost exactly the results through similar highway countryside in East Texas. Very pleased with mileage and performance.

 

[aminoacid91]

I just completed a 1,300 mile road trip from Dallas to Birmingham. Two people in the car and fully loaded back seat and trunk. I got 29.7 mpg calculated with actual gallons used for the entire trip. I drive 75 on the Interstate using cruise control when possible. I also increase my cold tire pressure to 35 psi prior to any road trip.

As to use of premium vs. regular top tier gasoline, I can not discern a difference; if there is, it is less than .5 mpg. Certainly nothing to justify the 15-20% difference in price.

The Genny gets almost exactly one mpg less than my previous 2013 Avalon driven in the same manner. As the Genny weighs about 500 pounds more, I think this is a excellent return.

I just realized my tires are at ~31 psi during sunny So-Cal high-pressure weather, and around ~26 psi during cloudy low-pressure weather... Do you think the air-pressure might hit my mpg? I am gonna inflate them to ~35psi this evening and see if I notice a difference.

 

[Alwaysforward]

Tire pressue does impact fuel mileage.

 

[Nikgen]

Tire pressue does impact fuel mileage.

and tire life!

 

[Nikgen]

I just realized my tires are at ~31 psi during sunny So-Cal high-pressure weather, and around ~26 psi during cloudy low-pressure weather... Do you think the air-pressure might hit my mpg? I am gonna inflate them to ~35psi this evening and see if I notice a difference.

26 psi is way underinflated! Best to inflate to recommended (33 psi), check once a month and re-adjust with big swings in temps (certainly seasonally). Also, make sure you check/set pressure when the tires are cold.

 

[aminoacid91]

Inflated the tires to 36psi a couple of nights ago, and wow what a difference! I can feel the road now... The tires sensors show 34psi right now. Excited to see if I see an increase in MPG. Thanks for the help