Quick Answer: Can You Put Regular Gas In A 5.7 Hemi?

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..

What’s the difference between 87 and 89 gas?

What is the difference in octane levels? Octane is how much compression a fuel can withstand before igniting, or rather it’s a measurement of a fuel’s ability to avoid knock. … Typically “regular” gas is 87 octane, “midgrade” is 89 octane and over 91 octane is “premium” gasoline.

What is the difference between the 5.7 Hemi and 6.4 Hemi?

The 5.7 Hemi engine has a stroke length of 90.88 mm (3.58 inches), whereas the 6.4 Hemi engine has that of 94.6mm (3.72 inches). We all know that the longer the stroke, the better. The longer stroke allows the 6.4 to deliver more power than the 5.7 Hemi.

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.

What kind of gas does a 5.7 Hemi take?

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 you use 93 octane in a 5.7 Hemi?

93 vs 89 will not harm your engine, nor will it benifit it. The higher the octane rating the more resistant it is to ignition, it burns slower.

What happens if you put 87 octane in a 93 octane car?

If you usually fill your tank up with 87-octane gasoline and you accidentally put in a higher octane blend (say, 91, 92, or 93), don’t worry. … You may feel a difference in the way the vehicle runs and may notice an improvement in gas mileage, but that’s about all that will happen.

How much HP does premium gas add?

Premium, also known as 93 octane gasoline, is the most expensive gasoline at the pump. Premium gasoline does and does not give more horsepower, depending on the type of automotive engine it is used in.

Is 93 octane better for your engine?

Higher Octane Doesn’t Mean Better Performance Using a higher octane gasoline will not help clean your engine. … This means that your engine will be cleaned the same by 87 octane fuel as it will by 93 octane fuel, so don’t feel that it’s necessary to treat your car to a higher grade.

Does Dodge Charger require premium gas?

the 2019 charger with the 3.6l takes 87 octane regular unleaded. … for the 5.7l engine, dodge recommends 89 octane plus unleaded. 91 octane premium unleaded gasoline is appropriate for the 6.4l engine option. the 2019 dodge charger srt’s 6.2l supercharged engine requires 91 octane premium unleaded gas.

What happens if you mix premium and regular gas?

It probably won’t hurt anything. If your car requires regular gas, the blend will have plenty of octane and detergent and may even run a little better or get a bit better mileage. If the car requires premium, the blend won’t have as much octane as it should.

Is 87 or 89 gas better?

Slightly better fuel economy is there, but it’s not worth the huge price gap from regular to premium.” Most gas stations offer three octane levels: regular (about 87), mid-grade (about 89) and premium (91 to 93). … The higher the octane, the greater resistance the fuel has to pinging during combustion.

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.

What kind of gas is 89?

Gas stations in the United States generally offer three octane grades: regular (usually 87 octane), mid-grade (usually 89 octane), and premium (usually 91 or 93).

Does a 5.7 Hemi need premium gas?

Ram recommends using either 87 or 89 octane in new Ram 1500 models equipped with the 3.6-liter Pentastar V6 engine or the 5.7-liter HEMI V8 engine, but do you know what that means? … Basically, a fuel’s octane rating is the measure of how much compression a fuel can withstand before igniting.

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.

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.

Can I run 91 octane in my 5.7 Hemi?

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