Fuel

[40Hunter69]

Hi there. Just bought a 2016 G80!! Is it true I have to use premium gas?

thanks

 

[joegr]

Well, you don't have to. You may or may not want to, but that depends on which engine you have.

 

[EdP]

Hi there. Just bought a 2016 G80!! Is it true I have to use premium gas?

thanks

If you have the 3.8 regular is recommended and works just fine. The 5.0 is supposed to get a tad more power with premium.

 

[TinsleyC]

From your manual, you asked in that other thread -

 

[Mcc]

If you have the 3.8 regular is recommended and works just fine. The 5.0 is supposed to get a tad more power with premium.

Definition of tad

1: a small or insignificant amount or degree
Is that what you meant? And if so how did you determine the increase in power is small or insignificant? It’s just that I keep hearing this repeated as fact.

 

[TinsleyC]

Actually, it's 1.2 tads. Pretty sure that's correct.

 

[Trumsodo]

honesty! I drove g80 sport 2018 and tried both regular and premium, there is a huge gap between for power but the same km overall. But beware that after too long for running regular, your car won't be the same as before even put back premium fuel. its take me a month running back the premium to get back the same power, I think regular fuel way to dirty for turbo

 

[EdP]

Definition of tad

1: a small or insignificant amount or degree
Is that what you meant? And if so how did you determine the increase in power is small or insignificant? It’s just that I keep hearing this repeated as fact.

Note that I used the word "supposed" to give. I don't know for sure except what the manual says.

 

[PMCErnie]

honesty! I drove g80 sport 2018 and tried both regular and premium, there is a huge gap between for power but the same km overall. But beware that after too long for running regular, your car won't be the same as before even put back premium fuel. its take me a month running back the premium to get back the same power, I think regular fuel way to dirty for turbo

Dirty????

 

[Mcc]

Note that I used the word "supposed" to give. I don't know for sure except what the manual says.

You used “supposed” to give and a “tad” more to qualify the statement, as if it might not be significant. But you don’t know that (maybe you hope it if that’s what you use) But I agree all we know is what the manual says.

So “For improved vehicle performance, premium unleaded fuel ... is recommended.“ That says it all.

 

[carguy75]

You used “supposed” to give and a “tad” more to qualify the statement, as if it might not be significant. But you don’t know that (maybe you hope it if that’s what you use) But I agree all we know is what the manual says.

So “For improved vehicle performance, premium unleaded fuel ... is recommended.“ That says it all.

LOL. A "tad" is 13hp/11 ft/lbs improvement per a Hyundai 5.0 engine spec sheet for the 2016 model. Considering that is usually cost about $500+ for most chip tuners to provide similar gains on most non-turbo engines, I would say that is a gain from using premium gas that is worth getting for some drivers who want the most performance out of their engines.

However, premium fuel may make the car only about 2/10ths quicker from 0-60mph and smooth out the idle due to advancing the timing as opposed to retarding it to reduce knock when running on 87 octane.

 

[n8800m]

honesty! I drove g80 sport 2018 and tried both regular and premium, there is a huge gap between for power but the same km overall. But beware that after too long for running regular, your car won't be the same as before even put back premium fuel. its take me a month running back the premium to get back the same power, I think regular fuel way to dirty for turbo

Where did you get your factual information that regular fuel was dirtier than premium fuel? I believe the only difference between regular gas and premium gas is that the refining process for premium is different to increase the octane rating - the cleanliness of the two fuels are the same.

 

[Trumsodo]

Where did you get your factual information that regular fuel was dirtier than premium fuel? I believe the only difference between regular gas and premium gas is that the refining process for premium is different to increase the octane rating - the cleanliness of the two fuels are the same.

well I did ask the mech guys in genesis ( Hyundai ) dealer and he said if you if regular often then they will put 2 bottles of fuel system cleaner at any oil change service and also recommend buy and use it at each 2000km ( maximum is 6 bottle for 10k km ). also i do feel like after a month of regular gas used, even i put back premium, there is a turbo lag badly and horsepower not like before

 

[n8800m]

Well if you use a top-tier fuel whether it is regular or premium, the detergents added by the fuel supplier to the fuel will be the same. These detergents help prevent the buildup of deposits on fuel injectors and valves - the same with both types of fuel. I still don't understand why you think there is dirt in regular fuel.

 

[bubbaG80Sport]

Base stock gasoline, as well as diesel and jet fuel, is transported from refinery to regional tank farms in the same underground pipes.
At the regional tank farm additives (specific to brand and/or dictated by local/state government regulation) and ethanol is added the tanker delivery trucks as they are filled. The brand specific additives (e.g. Exxon/Mobil) are generally the same across all grades (regular, mid-grade and premium) of fuel. Additionally, the base gasoline stock is made premium/high octane by adding additional ethanol. Mid-grade is created by mixing regular with premium at the gas station pump. Subsequently regular gasoline is the same level of "dirty" as mid-grade and premium.

A downside to mid-grade and premium is volume of sales is lower. These grades of gas will sit in the retail stations tanks longer. Due to condensation and because they contain more ethanol these grades are more prone to collecting water in the gas station tanks.
As I run premium in my G80 Sport, I ...
1) Avoid small bargain gasoline stations.
2) Use only "Top Tier (TM)" from name brand stations to minimize this problem.
3) Avoid filling up my lady at a station when a tanker truck is filling the tanks (mixes up water in bottom of fuel tanks).

One of my first jobs was working at a local convenience store.. Every night I'd use a 12 foot stick to measure the amount of water in the fuel tanks. Water settles to bottom of gasoline tanks. Pump inlet in tanks was about 12" from bottom. If water level got to 11.9" owner would bring a pumper in to remove the water (typically every 3-6 months depending on season). Owner was a cheap SOB and would wait until the last minute to pump out the tanks. To this day I don't buy gasoline at these stores.

 

[TinsleyC]

I always wondered what those long measuring sticks did. I just figured they were measuring how much gas was in the tank.

Also didn't realize the only difference between premium and regular was extra ethanol.

My G37 liked premium but it only needed 91. In the Dallas area they sell 87, 89, and 93. Two parts if 93 and one part 87 makes 91, so I'd pump 12 gallons of premium and then 6 gallons of regular. With a 50 cent difference between the two, I'd save $3 on a fill-up. Not bad pay for 30 seconds to swipe the credit card.

 

[bubbaG80Sport]

I always wondered what those long measuring sticks did. I just figured they were measuring how much gas was in the tank.

The "stick" was used to measure both amount of gas and water in station tanks. Gasoline level/height was measured by where stick went from dry to wet with gasoline/petrol. Water was level was measured by applying a "brown goop" on the bottom 12" of the stick. Goop changed color to red/pink where it came into contact with water.