Premium Gas in 2013 GDI V6?

[craigt]

You mean the kind of engine that can benefit from the detergents in higher grade fuels? Still no benefits, since that's not in the written literature, I guess.

Top tier gas has detergents in all grades of gas. Thus, the literature is correct. Thanks for confirming!

 

[LandoAWD]

Top tier gas has detergents in all grades of gas. Thus, the literature is correct. Thanks for confirming!

Here's some Shell literature, ya know, since you like literature:
" 7. What makes Shell V-Power NiTRO+ Premium Gasoline different than other Shell grades?

Shell V-Power NiTRO+ contains the highest concentration of the Shell Nitrogen Enriched Cleaning System and cleans up faster than Shell regular."

 

[craigt]

Luckily, our cars don't need the highest concentration of Shell's Nitrogen Enriched Cleaning System. I know this because it's not in the Hyundai literature.

 

[Mark_888]

Luckily, our cars don't need the highest concentration of Shell's Nitrogen Enriched Cleaning System. I know this because it's not in the Hyundai literature.

That is Shell's version of Techron, which is included in Chevron gas or sold separately. Hyundai recommends occasional use of Hyundai Fuel Injector Cleaner, which is made for Hyundai by Chevron and it contains Techron (as specified right on the plastic bottle sold by Hyundai).

 

[LandoAWD]

Luckily, our cars don't need the highest concentration of Shell's Nitrogen Enriched Cleaning System. I know this because it's not in the Hyundai literature.

Knowledge by omission, I see. Enjoy those dirty valves, or paying the dealer for their treatment.

 

[craigt]

Knowledge by omission, I see. Enjoy those dirty valves, or paying the dealer for their treatment.

Perhaps no better than knowledge by assumption.

 

[LandoAWD]

Chemistry and reasonable mechanical knowledge will at least add validation to the points made that you assume I'm assuming.

 

[craigt]

Without tests and results from someone with more than reasonable mechanical knowledge, it is still an assumption.

Written words from the manufacturer, to me, holds more weight.

To be fair to other forum users, let's agree to disagree.

 

[amartz]

Knowledge by omission, I see. Enjoy those dirty valves, or paying the dealer for their treatment.

Of course, with a GDI motor, what kind of detergent is in the gas is a moot point to the tops of the valves and the intake manifold.

 

[Mark_888]

Written words from the manufacturer, to me, holds more weight.

As I previously mentioned, preliminary published info from Hyundai on the 2015 V6 (before they received final EPA numbers on MPG) stated that the V6 could use either regular gas, or premium for slightly enhanced performance. The final specs only mentioned regular. The decision on the final wording is often a matter of what Hyundai marketing wants to project to consumers in terms of cost-of-ownership.

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[craigt]

Mark, I appreciate your comment, but the 2015 V6 was re-tuned (reported reduced hp) and realistically can't be compared to the 2013 (the topic of discussion).

 

[JJ62FOX]

I drove from Shreveport, La to Marksville, La---a 2 hour 17 minute drive--and thought I was seeing things on my trip odometer and gas mileage usaage. Guys/Gals...I forgot to set the mpg gauge as i was leaving, set it about a mile after i left, and when I reached my hotel IN Marksville, it was showing 32.9 mpg. Hmmm..........can't be right. On the way home, I set all gauges to zero, and to my delightful satisfaction, the mpg gauge was reading 33.1 mpg. This is using 87 octane gasoline.

Will be driving to Arlington, TX in January to see my 1st grandchild and will let you know what the mpg is on that trip.

By the way, I just joined the G.O.G. Forum. (all smiles!) Will be changing my oil myself for the 1st time tomorrow if it's not raining!!!

 

[PMCErnie]

Funny thread!

The bottom line is that the engines run great on regular which also offers the added benefit of the lowest fueling cost. Of course, if you own a refinery, take your pick.

 

[Mark_888]

Mark, I appreciate your comment, but the 2015 V6 was re-tuned (reported reduced hp) and realistically can't be compared to the 2013 (the topic of discussion).

I am not much interested in theory, so I have always recommended that people try various octanes to decide what is best for them based on the results the get.

On my 2009 3.8 V6 (EFI, 285 HP) I tried regular, premium, and mid-grade. I determined that mid-grade was the best compromise of power, fuel mileage, reduced engine noise, and cost. I frequently use my own custom blend of regular and premium, because it is cheaper that way than using mid-grade (look at the octane ratings and prices and you will know what I am talking about). I did not see any benefits when I tried using 100% premium on my particular engine with Shell or Chevron gas. Note that results vary by brand of gasoline.

People ask me how well the gas mixes if I first fill half the tank with regular, and then the other half with premium. Because I drive less than 4000 miles per year these days, I don't fill the tank completely (don't want to be driving around with stale gas), and therefore it sloshes around and mixes the two types of gas I use (premium and regular) a little easier than if the tank was filled to the max.

 

[Yoda_guy]

I've tested a very large sampling of Toyota vehicles for mph difference between 87 and 91. All of them with the exception of the Prius 1.5 gained mpg using 91. I'm assuming this has to do with ignition advance and knock threshold. Having said that, the gain in mpg is negligeble so I say screw it. Buy what you want.