solarity

Been running 87 Octane in my MDX for close to 90,000. The manual states it can safely use 87, though you might see a slight reduction in MPG/performance difference. I even called Acura to verify this. If your vehicle isn't tuned to take advantage of the high octane, you will see no benefit and are throwing money away. My parents have had vehicles that require premium for years. My old man is happy when he got his F150 that uses regular.

BlackBoost

It all depends on the vehicle and what the book says. Tuned and high-performance cars may demand premium. Otherwise, you're not doing yourself a favor by using anything other than regular unless you're running a turbo/and/or your local altitude creates the need for it.

I've had my 2.7 EcoBoost for 1 year and 7 months, and have 56k on it. When I first got it, I ran a few tanks of premium and saw no difference in mileage or power. I also ran a few tanks of premium a few months ago just out of curiosity again, and still saw no difference.

Anyone thinking there's more HP is fooling themselves. It's the placebo effect of doing something different and believing that it's actually different when it's all in your head.

The manual states that you should use premium under severe towing conditions, and severe sounds like you're at the max weight and driving up steep grades, which in this case could cause pinging on regular gas. But avoiding engine ping, and creating more HP are two completely different things in an engine that continually adjusts its parameters and timing using its sensors, and is designed to run on regular for day-to-day driving.

All Hat No Cattle

I"m glad Scruffy showed up, about time.

But may I recommend this for many other threads?

solarity

I hear certain stickers add HP as well, though cost a lot less money in the long run 0_o

HacksawMark

Thank you.

PawPaw

Local Shell station was out of service this afternoon so I filled up at the local Walmart station that sells Murphy/Valero. 87 was $1.77 and 93 was $2.69!! Big difference so I split the difference and went with 89 for $2.15. Truck took over 28 gallons to top off.

Truckin

iTrader: (4)

Yeah...noticed that the difference is alot! ...help my old mind remember...for years was it not .10 more for mid grade and .20 for premium

Speedfreak400

This statement is factually incorrect.

Dave Z

You sir have been breathing too many 93 octane fumes!


"The answer, according to experts who study fuel efficiency in detail, is both regular and premium gasoline. And it would be a waste of money to favor premium over regular, especially in these times when gasoline prices are high, according to the experts.
Virtually nothing is gained by filling up with a premium or more expensive grade of fuel than the vehicle manufacturer has recommended, the experts say. And many of the same experts explain that drivers may not lose much performance from their cars by using a lower grade of fuel than recommended by the car manufacturer. "


http://www.consumerenergycenter.org/...s_premium.html

tsigwing

Since he is talking about his 2.7, what is incorrect?