Quick Answer: What Fuel Is Recommended For A 5.7 Hemi?

Can you use 93 octane in a 5.7 Hemi?

93 octane is likely too much for the Hemi and probably reduces the efficiency of the engine due to the difficulty of fuel detonation in the lower compression engine at the time of the peak power stroke.

The wreak havoc on boat tanks, fuel lines and engine parts.

I guess vehicles handle it a little better.”.

Should I use 89 octane?

Mid-grade fuel lies somewhere in between the other two grades, typically with an octane level of 89. … “On engines that do not require the higher octane, the benefits are there but less apparent,” Maas adds. “You could gain a slight bump in fuel economy.

Can you mix 87 and 89 gas?

Yes. You will not harm your car by mixing different octane grades of the same gasoline providing your car’s engine is designed to run on less than 89 octane fuel and you are not using E85 in a non-E85 compatible engine. … Most gas stations that sell 87, 89 and 91 octane gas use what is called a mixer pump.

Does the 5.7 Hemi require premium gas?

Turns out it’s also for owners of Fiat Chrysler’s Hemi 5.7-liter V-8, as the company recommends 89-octane fuel for this engine.

Can I run 91 octane in my 5.7 Hemi?

Premium Member The manual recommends 89, and even goes so far to say that 91 or above could hinder performance and is not recommended.

Can I run 87 octane in my Hemi?

All of the new vehicles “CAN” run 87 octane fuel, but it’s not recommended and used repeatedly or long term will eventually result in engine damage. It should not spark-knock, as the ECU (computer) should detect it and detune the ignition accordingly but with commensurate sacrifice in both performance and MPG.

Do Hemi engines need premium gas?

To reduce the chance of pinging and knocking because of higher cylinder pressures, Chrysler recommends 91 octane fuel be used with Hemi engines that are matched to a manual transmission. 87 octane fuel is considered the acceptable minimum for Hemis with manual transmissions.

How many MPG does a 5.7 Hemi get?

15 mpg5.7 HEMI V8 Engine: 4×2 fuel efficiency rated at 15 mpg city/22 mpg highway; 4×4 fuel efficiency rated at 15 mpg city/21 mpg highway.

Does premium gas give better mileage?

Premium gas gives you more miles per gallon than regular gas. … In actual fact, you’ll get a greater range of fuel economy between different brands of regular gas, than you will between the same manufacturer’s regular and premium gasses.

Will 93 octane increase HP?

Premium gas must be, by law, at or above 91 percent, although you do also see 93 percent octane ultra-premium at many stations. … Octane does not offer any better fuel mileage, increase engine horsepower, or make the engine start quicker. Higher octane only reduces the likelihood of engine knock or ping.

How much horsepower does a 5.7 L v8 Hemi have?

395 horsepower5.7-liter HEMI® V8 – This V8 engine offers the legendary power and capability you’ve come to expect from the iconic HEMI® name. It pushes out an incredible 395 horsepower and a whopping 410 lb-ft of torque.

Is 5.7 Hemi a good engine?

In general, the third-generation Hemi V8s don’t have any significant design flaws, and the 5.7L version is a solid reliable engine. Many owners are faced with a strange ticking sound in the 5.7L Hemi engine coming from the valvetrain, which, however, does not affect anything.

Does 6.4 Hemi need premium gas?

Well-Known Member. 89 is recommended, 87 is acceptable. Premium offers no benefit and is suggested not to be used.

How can I get better gas mileage in my 5.7 Hemi?

How to Increase Mileage on a Dodge RAM 5.7 HEMIChange your RAM’s oil every 3,000 miles or at least every three months. This keeps the engine clean and running well.Get a tune up. … Avoid letting your Doge idle for long periods of time. … Check your tires often. … Avoid accelerating quickly. … Check your air filter.