Gasoline 87? 91?

[darthspader]

besides o feel that the top tier gas is a marking pitch. imo all the top tier gas companies probly have to pay a membership fee just to be on the list. thats all. just my opinion i have done no researsh.

 

[Mark_888]

well the price difference of .50cents per gallon or .2 of a mile. its cheaper to use regular. i have tried premuim. and i think its subconsicience but i get worst mpg on preamuim

I didn't say whether it is worth it or not, only that everything else being equal, you should get slightly better fuel economy with premium on the Genesis 5.0 V8. After all, when Hyundai submitted the Genesis MPG results to the EPA, it was using premium gas. If they had gotten better mileage using regular, the EPA site would list regular for the Genesis 5.0.

One reason why you may not get better mileage with premium is that you do get about 7 HP more with premium (per Hyundai Specs). But if you use that extra HP, then your gas mileage could be worse than regular.

 

[Mark_888]

besides o feel that the top tier gas is a marking pitch. imo all the top tier gas companies probly have to pay a membership fee just to be on the list. thats all. just my opinion i have done no researsh.

You should do the research. As explained above, the Top Tier Gas program was started by auto-manufacturers, not oil companies. Some large oil companies have resisted the Top Tier designation, including BP, although BP just recently now certifies that all their gas is now Top Tier. Top Tier does not mean major oil companies, as their are many smaller companies and retail chain stores (not connected with oil companies) that are now certified as Top Tier.

 

[Midnightsun]

TOP TIER Detergent Gasoline is the premier standard for gasoline performance. Seven of the world's top automakers, BMW, General Motors, Honda, Toyota, Volkswagen, Mercedes-Benz and Audi recognize that the current EPA minimum detergent requirements do not go far enough to ensure optimal engine performance.

I read this as those guys make poor burning engines and need additional assistance from additives in cleaning them up so top tier is recommended. Hyundai does not say to use top tier so why would you?

I really do not believe in the top tier hype. If it was really better would we not see articles and test showing great improvement and recommendations galore? All we see are a few forums mentioning this and google brings up little after how many years of implementation?? Personally I will believe the EPA any day before car or oil companies.

If it makes you feel better then by all means continue with top tier however it is important to note that top tier must provide a fixed minimum for keeping engines clean regardless of octane rating or regular vs premium if you prefer. That being said, premium throws in again more detergents but what for if they already meet or exceed the requirements of top tier. Makes you wonder what the heck goes on sometimes does it not?

 

[Mark_888]

I read this as those guys make poor burning engines and need additional assistance from additives in cleaning them up so top tier is recommended. Hyundai does not say to use top tier so why would you?

I really do not believe in the top tier hype. If it was really better would we not see articles and test showing great improvement and recommendations galore? All we see are a few forums mentioning this and google brings up little after how many years of implementation?? Personally I will believe the EPA any day before car or oil companies.

If it makes you feel better then by all means continue with top tier however it is important to note that top tier must provide a fixed minimum for keeping engines clean regardless of octane rating or regular vs premium if you prefer. That being said, premium throws in again more detergents but what for if they already meet or exceed the requirements of top tier. Makes you wonder what the heck goes on sometimes does it not?

If you read the Tip Tier website link, you will see that just about all gasoline is now Top Tier, no thanks to the EPA and their pitifully insufficient standards concerning gasoline additives to maintain clean engines. Initially, that was not the case, which is why auto-manufacturers started the program, back when fuel injector clogging problems were prevalent.

 

[pusaterkm]

I paid for a 5.0 with 420hp and I want all 420hp. I use Shell 93 Vpower. Yes the car runs fine on 87 but I bought the v8 for a reason. If I was worried about saving money at the pump I would have bought a Prius.

 

[zielritter]

Not to totally hi-jack, but I've asked this before without getting an answer. Wiki shows that the 3.8l GDI for 2012-2014 produce 333hp with premium and 329 with regular.

Hyundai doesn't (didn't) disclose this on their website only mentioning the 5.0 getting a power advantage with premium.

http://en.wikipedia.org/wiki/Hyundai_Genesis

Curiously, the same wiki page doesn't mention a distinction for the 2015 for either the V6 or V8 when using regular vs premium fuel.

They don't list a cite for the table and a quick scroll through the sources didn't reveal something obvious. Just curious about the discrepancy here. Is the HP variance so small that the governing bodies didn't require Hyundai to disclose premium vs regular power for the V6?

 

[EXBMWGUY]

i use the cheapest regular unleaded in town. my 5.0 does not have a problem. i travlef 400 miles this weekend. my mpg was 28.2 on the highway. both 85 north and southbound. the same both ways.

I use the cheapest top-tier regular gas I can find, with occasional splurges of ethanol-free Shell. Where I live, there are a couple of Shell and BP stations that are very competitive (not with Costco, but every other top tier brand). My experience with premium - even 93 - is more in my head than at the rear wheels. Never had a problem with pinging or fouled injectors. 45,000 miles and it runs like delivery day 2 1/2 years ago.

 

[Mark_888]

Is the HP variance so small that the governing bodies didn't require Hyundai to disclose premium vs regular power for the V6?

Not 100% sure, but I think automakers only have to disclose the gasoline octane grade used for the EPA fuel economy tests. I don't think HP is rated by the EPA.

If there was some incorrect HP information provided to consumers via false or misleading advertising, someone would probably have to file a legal complaint through some other means, possibly the FTC, or just a class action lawsuit.

 

[zielritter]

Not 100% sure, but I think automakers only have to disclose the gasoline octane grade used for the EPA fuel economy tests. I don't think HP is rated by the EPA.

If there was some incorrect HP information provided to consumers via false or misleading advertising, someone would probably have to file a legal complaint through some other means, possibly the FTC, or just a class action lawsuit.

They got in trouble with the last generation Tiburon when it came out and they overstated HP so I would think the same would've happened here if there was a material overstatement.

You can even find early literature on the web that lists the 3.8l sedan GDI as 329 vs 333hp although that wiki link is the only place that attributes the difference to fuel grade. Just curious. It's like a 1% difference in power.

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[Alwaysforward]

I paid for a 5.0 with 420hp and I want all 420hp. I use Shell 93 Vpower. Yes the car runs fine on 87 but I bought the v8 for a reason. If I was worried about saving money at the pump I would have bought a Prius.

^ Ditto

 

[acecert]

I don't claim to know much about gas but I did talk to the service manager about the cars recommendation of 91 vs. using 87 octane. He indicated the car will run fine on 87 but may lose a bit of horsepower and mileage (as you all have indicated). He said what's more important is where you get your gas. He indicated not to go to AM/PM or places like Costco where he said the alcohol content in the gas is high. He indicated that they regularly see that when people shop at these lower cost gas outlets that they find sludge in the exhaust. He recommended going to the better distributors such as Chevron, Shell, etc. Thought I'd pass on what I was told.

 

[Mark_888]

I don't claim to know much about gas but I did talk to the service manager about the cars recommendation of 91 vs. using 87 octane. He indicated the car will run fine on 87 but may lose a bit of horsepower and mileage (as you all have indicated). He said what's more important is where you get your gas. He indicated not to go to AM/PM or places like Costco where he said the alcohol content in the gas is high. He indicated that they regularly see that when people shop at these lower cost gas outlets that they find sludge in the exhaust. He recommended going to the better distributors such as Chevron, Shell, etc. Thought I'd pass on what I was told.

If you go to the TopTier website, they will indicate which gas is certified as TopTier. Costco website lists individual locations, since they get gas from local independents, and not 100% of them are TopTier certified, but most are.

AM/PM is owned by BP, and is TopTier, although their gas has a tendency to spill.

 

[simplyaddo]

Here in Saudi we only have 91 and 95 octane gas. I use 95 simply because of the higher rating and for the fact that it is still cheaper than water (US$ 0.16 /L). Am I overdoing it with premium gas? Or is it OK to continue with 95?

 

[Mark_888]

Here in Saudi we only have 91 and 95 octane gas. I use 95 simply because of the higher rating and for the fact that it is still cheaper than water (US$ 0.16 /L). Am I overdoing it with premium gas? Or is it OK to continue with 95?

There are different methods of determining octane rating around the world, so 91 octane in one country is not necessarily the same as 91 octane in another country. In the USA octane rating is displayed in AKI. In Saudi, it is displayed as RON.

From what I have been able to determine, 91 octane AKI method (USA) is the equivalent of 95 RON in Saudi, and 87 octane AKI (USA) is about the same as RON 91 octane in Saudi.
http://en.wikipedia.org/wiki/Octane_rating

You might want to contact your local Hyundai dealer for more info and get their recommendations.

 

[thompithak3182]

I got a question, I been using no ethanol regular gas. It looks like I have been getting 2 mpg better than 10% ethonal gas. If i use premium no ethonal, will I get even better gas mileage?

 

[Mark_888]

I got a question, I been using no ethanol regular gas. It looks like I have been getting 2 mpg better than 10% ethonal gas. If i use premium no ethonal, will I get even better gas mileage?

Try it and let us know.

 

[Gunkk]

Using a top-tier (Shell) 91, I get 2 mpg better than 87 from the same station (21 mpg vs. 19 mpg in normal driving). Pays for itself.

Using a 90 no-E "recreational" fuel gives about the same as the 91, but costs another ~$0.30-0.40/gallon over 91. No benefit for me, and there's no way to know what additive packages come with the local 90-rec fuel.

 

[videopho]

Living near the coast has some advantages.
Plenty of Ethanol free gas stations around.
I have been filling'er up with 93 octane and pure gasoline (BP) ever since the second fill-up. (1st was free and on the dealership where the car was purchased).
Constantly 29-30 mpg on freeway speed.
Average 22mpg with 50/50 driving combined.
I have such a short commute to work everyday so cost is not a factor (yet).

 

[thompithak3182]

no ethanol gas stations are few and far in between. the gas prices for no e regular gas is just a little under premium with ethanol in it. I was wanting to know if it would be even greater gas milage and i really dont wanna spend that kind of money to experiment with no e premium. but if someone does get like 4 mpg better than the rated mpg. ill give it a try but i will stick with no e regular for now. maybe when i got some extra dough to blow i will do the experiment.