Question: Does The Hemi Engine Require Premium Fuel?

What is the best performance chip for 5.7 Hemi?

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Does 6.4 Hemi require 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.

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.

Does 93 octane burn cleaner?

Typically, the range will run from 87 octane on up to 93 octane. … Time and again, people will be told that high octane fuel burns cleaner or more completely, and that it will give them extra power and better fuel mileage than Regular octane gasoline because it contains more ‘energy.

Is the 6.4 Hemi reliable?

In general, the 6.4 Hemi is a big reliable, American pushrod V8 engine with a factory warranty for five years or 100,000 miles. In stock form, the 6.4 Hemi is a great engine that lasts and serves hundreds of thousand miles. But, the stock 6.4 is by design not built for boost and pushing more power.

Does flowmaster waste more gas?

Power and Gas While most sporty cars have the ability to pass sedans, Flowmasters give you the ability to pass almost any vehicle on the road. Not only will you be able to pass them, you’ll also pass them at the gas station more and more. Flowmasters can also help you save money by increasing your miles per gallon.

Can you use 93 octane in a 5.7 Hemi?

ZJ Grand Cherokee Forum > 5.7 liter Hemi-Why no 93 Octane ? No it will not hurt the engine to go higher in octane. … 93 won’t hurt but there are few legitimate reasons to use it if your engine doesn’t require it. Higher octane by itself provides little or no performance benefit for an engine that does not require it.

Can you put regular gas in a 5.7 Hemi?

The 5.7L requires 89 octane w/ auto trans and 91 octane w/ manual trans per the owner’s manual. You can run 87 octane in your car but the computer will pull timing to compensate for the inevitable spark knock that will result from using a poor grade fuel in a performance car.

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.

Can I run 91 octane in my 5.7 Hemi?

Registered. 87 is allowed but 89 is recommended for best performance and fuel economy. I run 89 since I’ve gotten it. Using 91 or higher is just a waste of money unless you’ve tuned it for 91/93.

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.

Why does a Hemi have 2 spark plugs?

Its spark plugs are also in a different location compared to flathead engines. Because they’re inside the HEMI rather than on top, the combustion process runs more smoothly. It has two spark plugs per cylinder, which helps produce as little emissions as possible.

How much horsepower can you get out of a 5.7 Hemi?

525 hpIn stock trim, the intake ports on the 5.7L heads top 260 cfm. That is enough airflow to support over 525 hp on a modified (normally aspirated) Hemi application. The larger 6.1L (and 6.4L) heads flow even more, but the icing on the cake is that all heads will respond to porting.

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

The 6.4 is very smooth and refined feeling for an HD engine. You also get added benefits that the 5.7 does not have like a stronger block, sodium filled exhaust valves, extra piston cooling, no worry over breaking manifold bolts, easy oil filter access, among others. Fuel economy isn’t going to be great with a 6.4.

Is a hemi good on gas?

The word “Hemi” makes most auto enthusiasts think “power,” but rarely would it inspire the thought of fuel economy. None of the three remaining Hemi-powered Dodges crest 15 mpg in the city, but the Hemi in these models get respectable mileage on the highway. …

What kind of gas does a 5.7 Hemi take?

When the Hemi is matched with an automatic transmission, Chrysler recommends 89 octane fuel for peak performance. 87 octane is the minimum octane rating listed for the base Hemi regardless of transmission, but for the best mileage and performance, the higher-octane recommendations should be followed.

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.

Is the 5.7 L 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.

How many miles will a 6.4 Hemi last?

250 000 milesWe’ll also discuss what problems these engines commonly experience, as well as if it’s a good towing truck. The maximum mileage you can expect from a 6.4 V8 Hemi is anything in excess of 250 000 miles.

How much does it cost to replace a 5.7 Hemi engine?

As low as $2895.00 DELIVERED (pricing depends on year of engine). All of our Dodge 5.7 Hemi Engines are top grade professionally rebuilt engines carrying a nationwide 100,000 mile warranty.