About Requirement for Premium Gas

[psybj]

Saw that Premium Gas was recommended for both Stinger engines.

Note, however, that my wife's '09 Genesis Sedan says Premium gives 375hp, then notes that with Regular gives 368hp.

My wife is happy with the 368. I could never give up the extra hp but I love power.

Best guess is that many drivers will use Regular and save 10+%.

 

[slimfit]

I'll gladly pay the $5-$10 extra per fill up. Quality gas and better performance is worth it imo.

 

[app_master]

...normally better mileage too

 

[jburns]

Saw that Premium Gas was recommended for both Stinger engines.

Note, however, that my wife's '09 Genesis Sedan says Premium gives 375hp, then notes that with Regular gives 368hp.

My wife is happy with the 368. I could never give up the extra hp but I love power.

Best guess is that many drivers will use Regular and save 10+%.

My K900 is the same deal. 420hp with premium. It falls to 407 with regular. I usually run premium although if I am on a long trip where I will be burning straight through several tanks on interstates I will cheat and get regular. The car doesn't seem to care one way or the other. Motor Trend did a mileage test on the K900 comparing regular to premium fuel and found no statistically measurable difference.

 

[BahamaTodd]

I'll gladly pay the $5-$10 extra per fill up. Quality gas and better performance is worth it imo.

There is no difference in quality between lower and higher octane gas from the same station. They will both have the same additives and detergents.

 

[jburns]

There is no difference in quality between lower and higher octane gas from the same station. They will both have the same additives and detergents.

Yep. Octane is the only difference.

 

[panaut0lordv]

I think I'll fuel my Stinger GT with LPG + V-power Nitro+ Racing
But probably gotta wait before manufacturers come up with some dedicated solution for the engine.

 

[Jeff@Dallas]

Saw that Premium Gas was recommended for both Stinger engines.

Note, however, that my wife's '09 Genesis Sedan says Premium gives 375hp, then notes that with Regular gives 368hp.

My wife is happy with the 368. I could never give up the extra hp but I love power.

Best guess is that many drivers will use Regular and save 10+%.

High compression engines that call for premium should use premium. Most engines today won't knock with lower grade but for a car like this I wouldn't skimp and take the chance.

 

[ballistic]

High compression engines that call for premium should use premium. Most engines today won't knock with lower grade but for a car like this I wouldn't skimp and take the chance.

i will use premium as well. i'd rather get the most performance out of the engine and i feel like premium lasts me longer. i feel i get better mpg out of premium gasolines.

 

[app_master]

I drove your west coast for a few weeks last year and found when using premium it gave a significant increase in highway mpg's.
Over that time we mostly drove a hyundai santafe sport but also had a brand new dodge charger, for a few days, which had 800 miles on odo on pickup!

...My stinger will only be fed premium.

 

[lostnspace]

My last 4 cars have required premium gas, so the sticker shock over the price of premium is gone. Nothing but premium here.

 

[Jenny Wang]

I've been thinking I'll use 87 octane. Mainly because I'll rarely be driving the car hard. I was going to write never but my right foot does occasionally get heavy. Like @jburns I wouldn't pay the extra money on a long trip. That just seems wasteful.

Now to my question. I know a lot of people who feel the higher octane is better for the engine. I also know a lot of people who disagree with that. Do you guys think the lower octane is worse for a smaller engine than a bigger engine? In other words if using 87 octane isn't such a great idea, would it be an even worse idea for the 2.0 than it would be for the 3.3?

 

[Bamm1]

I've been thinking I'll use 87 octane. Mainly because I'll rarely be driving the car hard. I was going to write never but my right foot does occasionally get heavy. Like @jburns I wouldn't pay the extra money on a long trip. That just seems wasteful.

Now to my question. I know a lot of people who feel the higher octane is better for the engine. I also know a lot of people who disagree with that. Do you guys think the lower octane is worse for a smaller engine than a bigger engine? In other words if using 87 octane isn't such a great idea, would it be an even worse idea for the 2.0 than it would be for the 3.3?

If using multiple grades of fuel was within the design parameters of the engine (regardless of engine displacement) you won't be risking long term damage by using 87 Octane. But you will likely see reduced performance. Driving it "hard" with 87 Octane will just net you slower times, not catastrophic engine failure.

 

[Alan]

I've been thinking I'll use 87 octane. Mainly because I'll rarely be driving the car hard. I was going to write never but my right foot does occasionally get heavy. Like @jburns I wouldn't pay the extra money on a long trip. That just seems wasteful.

Now to my question. I know a lot of people who feel the higher octane is better for the engine. I also know a lot of people who disagree with that. Do you guys think the lower octane is worse for a smaller engine than a bigger engine? In other words if using 87 octane isn't such a great idea, would it be an even worse idea for the 2.0 than it would be for the 3.3?

My suggestion is to see what the owners manual for the Stinger says. It'll likely be the same, that either are ok. Follow the published guidelines... and if both are allowed, experiment. I'd guess driving style will affect how noticeable an impact the different grades make. The most important thing is if it says use premium, use premium. If it says use regular, use regular.

 

[psybj]

Wife's Genesis V8 says use Premium for 375 hp, or use Regular for 368 hp.

My wife is happy with 368 hp.

We assume that they would have warned us if using Regular caused any other problem or loss.

 

[ralzod]

Curious where the premium fuel requirement was seen. I ran the owners manual through 3 different translators, and the only spec I could find simply says "unleaded gasoline."

Edit: I found the fuel spec listed in the Stinger specs thread on this forum, but I didn't see a source for that information. I would be surprised if premium wasn't recommended, so maybe it's just documented somewhere other than the owner's manual.

 

[psybj]

As I understand these engines & gas grades, the issue is knock. Solved by sensors that adjust engine characteristics such as spark, whatever, to adjust the engine to the fuel characteristics.

Suspect the manufacturers were forced to do that because who knows what fuel will be like during the life of the car.

 

[mediocrepizza]

Curious where the premium fuel requirement was seen. I ran the owners manual through 3 different translators, and the only spec I could find simply says "unleaded gasoline."

Edit: I found the fuel spec listed in the Stinger specs thread on this forum, but I didn't see a source for that information. I would be surprised if premium wasn't recommended, so maybe it's just documented somewhere other than the owner's manual.

View attachment 319 View attachment 321

http://www.kiamedia.com/us/en/models/stinger/2018/specifications

Found here, for both engines it lists "Premium Recommended".

 

[ralzod]

Google translate from KIA website...

V6 3.3 GDI
6-cylinder 370-horsepower twin-turbo gasoline engine with zero-back 4.9 seconds of best-in-class power
※ It is recommended to use advanced gasoline (RON 95 or higher) for optimum engine performance. There is no problem when using general gasoline, but there is a possibility that the output and torque may decrease somewhat and the fuel consumption may increase.

(same disclaimer for the 2.0 motor)

 

[jburns]

Google translate from KIA website...

V6 3.3 GDI
6-cylinder 370-horsepower twin-turbo gasoline engine with zero-back 4.9 seconds of best-in-class power
※ It is recommended to use advanced gasoline (RON 95 or higher) for optimum engine performance. There is no problem when using general gasoline, but there is a possibility that the output and torque may decrease somewhat and the fuel consumption may increase.

(same disclaimer for the 2.0 motor)

Pretty much the same for my K900. I believe the manual says you will lose around 10 hp. So 410 instead of 420. Still more than enough to get in trouble. These days the computer adjusts the engine to match the fuel and eliminates the pinging and knocking that used to occur. I guess you can run the cheapest gasoline that leaves you happy with the performance without running the risk of harming the engine.