bestest/cheapest way to get better mpg?

[Matt V]

I did the math and the price evens out the mileage overtime, with you slightly saving money. Whatever, the detonation prevention is worth it to me.

 

[CheeseHelmet]

the detonation prevention is worth it to me.

I hope I didn't give you the impression that I think you should be using regular gas. If I had an MP3 ECU I'd only be using premium as well

 

[zooma]

As far as higher octane gas, some cars had (have?) a gas savings feature where they would adjust the mixture lean until it sensed pinging and then back off a little. For cars like that, a higher octane fuel will allow for a leaner mixture and gas savings. Don't know if any Mazda uses that feature today but it may explain why some will recommend trying it.

 

[StealthWyvern]

The "bestest/cheapest" way to get better mpg is to flintstone it! lmao

Edit: as far as using Pre on the P5. I noticed a different in gas mileage and slightly more pickup. I always averaged 26-28mpg in town with per and 24-27mpg with reg. It really all comes down to how you drive it.

 

[CheeseHelmet]

As far as higher octane gas, some cars had (have?) a gas savings feature where they would adjust the mixture lean until it sensed pinging and then back off a little. For cars like that, a higher octane fuel will allow for a leaner mixture and gas savings. Don't know if any Mazda uses that feature today but it may explain why some will recommend trying it.

Our engines do have a knock sensing system (which can be used to do what you describe) so maybe that's why premium gas yields better mpg.

 

[Tom03es]

http://www.hypermilingforum.com//

 

[slavrenz]

trucks hate this, but wind drafting? lol j/k

but I hear filling up at night also saves you money...I guess less gas is evaporated while filling up.

Check everything everyone has already stated.
and o2 sensor.

This is an urban legend. The gas tanks are buried deep underground in tanks that barely see any fluctuation in temperature. The myth says that if you fill up during the day, the gas will be less dense, and you'll get less gas for your dollar. But ultimately, it's not true.

Same with the 93 octane. You'll never see better gas mileage because of it, and it may actually be hurting your engine, because it takes a higher compression ratio than our cars have to burn it completely.

The long-reach plugs are a different issue though. It's possible that you may actually see a slight increase in mpg and performance, because you're actually moving the spark physically closer to the fuel.