Question: Do Hemi Engines Use More Gas?

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..

Is the Ram 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.

Why was the HEMI banned from Nascar?

The HEMI engine was a mechanical marvel that was so successful it was banned from NASCAR after its first year. … By 1963, the 426-cubic-inch Wedge engine used in NASCAR was deemed to have hit its limit for horsepower.

Are Hemi engines better?

Pros of the HEMI engine The HEMI’s valves are allowed to be bigger because there’s more room on each side of the engine’s head. This makes up the airflow difference it loses from only having two cylinders as opposed to four or six. HEMI engines also have a smaller surface area than flathead engines.

Do v8 engines use more gas?

Large V-8 engines can speed up in a hurry, but when you run with the engine wide open, it blows through your gas quickly. … Cranking your car uses about the same amount of gas as idling for 10 seconds, and V-8 engines typically use more gas when idling than smaller engines.

What kind of gas mileage does a 5.7 Hemi get?

Ram 1500 Fuel Economy Rates 5.7 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 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.

Can you put 87 gas in a Hemi?

With that being said, if you use more than the recommended octane on your truck and the gas ignites from compression it can seriously damage your engine. … If you have the HEMI V8 engine, you should use the 89 octane, if you have the base V6 engine, then it is okay to use the 87. Just never use higher than 89!

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 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. … Remove extra weight from the bed of your truck.

Why are Hemi engines so powerful?

Because the Hemi surface area is smaller than flathead engines, less heat escapes during combustion and the fuel burns hotter. With the valves on the opposite side, they can be bigger, allowing more airflow. The Hemi engines are the heart of the Ram 1500, Ram 2500 and Ram 3500 trucks.

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.

Why do Hemi engines tick?

Low quality fuel can cause the hemi tick. Fuels that contain high amounts of ethanol or that are low octane may not properly lubricate the fuel injectors and can lead to a slight tapping or ticking noise. Low-octane gas has also been known to cause an ignition knock in high-performance engines.

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.

What truck has the best mpg?

What 4×4 Truck Gets the Best Gas Mileage? Once again, the Chevrolet Silverado 1500 comes out on top. The Silverado 1500 Duramax 4WD is rated 23/29/25 mpg. Not far behind are the diesel GMC Sierra 1500 4WD (22/26/24 mpg), the diesel Ram 1500 4WD (21/29/24 mpg), and the diesel Ford F-150 RWD (21/29/24 mpg).

How can I get better gas mileage in my Dodge Ram?

How to Get Better Gas Mileage in a Dodge RAMCheck your gas cap after each fill up at the pump. … Make sure all the air pressure in the tires are equal. … Switch to a free-flowing air filter. … Buy a Flo-Master cat-back dual exhaust system. … Take all items out of your Dodge RAM when you aren’t using them. … Switch to E-3 spark plugs.

Why does my Dodge Ram get bad gas mileage?

The fuel pump pulls fuel from the gas tank to the fuel injectors. The fuel pump can become clogged or malfunction. A bad fuel pump can lead to a rough running engine because it is not getting enough fuel. This will lead to a decline in gas mileage.

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.