Not unless the engine using it was specifically designed for it. Gas mileage takes many things into consideration, and if a car is designed to use standard octane gas, the use of high octane gas will not increase the car's mileage - it is just a way of figuratively blowing dollar bills out of the tailpipe.
Yes, higher octane gas does give higher gas mileage for your car. However, the increase in gas mileage may not as great as the increase in the price of the higher octane gas.
That depends on what the car was designed to run on. If it was meant to run on 87 octane, using 89 octane can make the mileage worse.
Octane rating is simply a relative measure of how much octane (which is a chemical substance) is contained in gas. The only way to do it properly is to buy higher octane gas. But buying higher than what your manual recommends is completely pointless. Contrary to popular opinion, you will NOT get more power, you will NOT get better mileage, and it will not run your engine cleaner.
87 Octane Regular Unleaded. The use of any higher octane fuel is a waste of money, and will provide no benefit whatsoever. You will get no better mileage, and no increase in power. Only engines designed to run on high octane fuel require that fuel. Anyone who tells you different is buying into the myth.
No. If your car runs well on a lower octane gasoline (i.e. no engine pinging or knocking), then putting a higher octane gas in your tank is just wasting money...
it's a little better than 87 octane but not really high test gas, 91 and 93 octane is the high test.
no
The grades gasoline are the different octane ratings, the cheapest gas has the least octane. The lower the octane in the gasoline, the faster it will burn. High performance cars need high octane fuel.
No, it will decrease gas mileage.
i found with mine, that if you used 91 octane you get worse gas mileage than with 87, you also have to remember the KZ models are old and when they were running the streets the most common gas was 87 octane 91 was pretty much race fuel. so if you want better mileage i would probably go with 87.
Spoilers decrease gas mileage. Spoilers are designed to create down force, which creates drag. The drag will increase gas usage.
Most professionals recommend that you use high octane gas. Like 92-94 octane.