Premium vs Regular Gas??? - Infiniti QX60 Forum
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post #1 of 38 (permalink) Old 04-25-2014, 10:58 AM Thread Starter
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Premium vs Regular Gas???

Just picked up my new QX 60 and would like to know from you experienced users if you put premium or regular gas in the car. I know the owners manual says the premium is recommended, but is it really necessary?

Please tell me your experiences. Thanks.
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post #2 of 38 (permalink) Old 04-25-2014, 11:32 AM
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Originally Posted by First time Infiniti Buyer View Post
Just picked up my new QX 60 and would like to know from you experienced users if you put premium or regular gas in the car. I know the owners manual says the premium is recommended, but is it really necessary?

Please tell me your experiences. Thanks.
Tried both. Did not see any of the 20% mileage boost or power boost that the 20% price premium for premium gas would demand. So I went back to using regular.
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post #3 of 38 (permalink) Old 04-25-2014, 12:40 PM
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I tend to switch between premium then mid-grade and occasionally regular. If I'm at COSTCO, I go with premium since its cheaper than commercial brand mid-grade fuels.

On our cross country 8,500 mile trip we pretty much stayed with premium unless it wasn't available. The best fuel milage was using premium at 24.5 mpg and the worse was 17.2 using regular. However during the low milage tank we were in the mountains and hitting severe head winds and had a fully loaded cargo box which I have no doubt made a difference.

I've never heard pinging or noticed a big difference between fuel grades but prefer to stay with the higher octane fuels.
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post #4 of 38 (permalink) Old 04-25-2014, 01:29 PM
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I owned a 2001 Acura TL Type S that 'required' premium, just like the QX60, for peak power. I ran regular in it for the 4 years I owned it and never experienced an issue from running regular. Computers in modern cars adjust for running regular and it will not harm anything.

Biggest benefit to running premium is they add more detergents to premium so it'll keep things cleaner but you can just run regular and toss in a bottle of Chevron Techron purchased at Walmart every 3000-4000 miles and it'll do the same thing.

I own the hybrid QX60 and unlike the V6 model, the I4 in the hybrid only calls for regular in the manual.




2014 Infiniti QX60 Hybrid AWD - Obsidian Black with Graphite Leather - Fully loaded including the Theater Package
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post #5 of 38 (permalink) Old 04-25-2014, 07:57 PM
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Tried both. Did not see any of the 20% mileage boost or power boost that the 20% price premium for premium gas would demand. So I went back to using regular.
how did you calculate 20%?
in California, regular is about 4 bucks a gallon, and premium 20 cents more... so it's only a 5% increase...
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post #6 of 38 (permalink) Old 04-25-2014, 08:38 PM
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Non hybrid, salesperson told us didn't need to put in the premium so have been using regular (86 octane). Not happy with gas mileage at all; definitely not what salesperson and the sticker advertised. We are getting about 16-17 which is based on mix of both highway and city driving.

Will be following this thread as have been wondering if it would be worth seeing if can get better mileage (and then whether worth the cost increase)
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post #7 of 38 (permalink) Old 04-25-2014, 11:08 PM
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The most important to question ask is do you hear any pinging when you drive on regular gasoline? Engine pinging indicates severe premature ignition which can cause engine damage. Pinging can be caused by using a low octane fuel in a high-compression (high performance) engine.

Lower octane fuel will detonate sooner under high pressure then high octane fuel. Premature ignition will affect performance and the power output of the engine. If your vehicle is experiencing lower gas mileage using regular fuel then you're experiencing some degree of premature ignition, even if you don't hear engine pinging. Bottom-line that will put more stress on your engine(specifically the valves) than would otherwise occur using higher octane fuel. I 'd use 91 octane
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post #8 of 38 (permalink) Old 04-26-2014, 03:46 PM
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To make it simple. You spend a little more for the premium up front, but in the long run I think you're doing your engine a favor, and it will pay off in the long run. You have a high performance engine in a luxury vehicle, and you want to put in the lowest grade of gas. Just doesn't make sense to me.
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post #9 of 38 (permalink) Old 04-27-2014, 12:05 AM
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If you want the stated horsepower, use premium. The motor will compensate for the octane level and won't ping. Engineers have made the ping a thing of the past.
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post #10 of 38 (permalink) Old 04-11-2017, 03:36 PM
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I picked up my QX60 last week and did one fill up with 87 regular gas at Petro Canada the computer showed about 475km. I filled again the empty tank with 91 premium gasoline and the computer show 590km. The drive is a lot more smoother and firm when using 91 gasoline.
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