Question: What kind of gas should I use in my 5.7 Hemi?

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.

Does Dodge Hemi 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 RAMs oil every 3,000 miles or at least every three months. ... 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.

Can I mix 87 and 89 gas?

You wont damage your engine at all if you use a higher octane - youre just wasting money. In North America, service stations blend the higher octane (like a 92 or 93) with a lower octance (87) for the mid-range fuels (89-91) so youre really not getting your moneys worth.

How much gas does a 5.7 Hemi use at idle?

According to my Scangauge, my 5.7L uses 0.3 gallons per hour while idling, once engine and transmission are at operating temperature. Thats 42.6 fl oz or just about 2.5 pints of gas.

Can I put premium gas in my Ram 1500?

Most vehicles and trucks are designed to operate on regular fuel, though. So, filling your RAM 1500 or Jeep Grand Cherokee tank with premium is basically just throwing money away.

What happens if you put 89 gas in a 87 car?

Most cars on the road recommend a standard grade 87 or 89. Premium gas 90-93 is completely okay to put in a standard vehicle. Car experts say there is no risk of damage to a standard car using premium fuel.

Is idling bad for a Hemi?

Oil pressure at cold idle is high but oil flow might be less than ideal. Thus prolonged idling after cold start could cause the engine to develop a HEMI tick not prevent it.

Can you let a Hemi idle?

Idle time is not good for these engines. They have to low of oil pressure/flow at the set idle RPM. So keep warm up time to a minimum. Best thing is to let the high idle go down (about 1 min) and then Drive like you have a cup of hot coffee on your dashboard for a while.

Can a 5.7 Hemi take premium gas?

The 5.7L requires 89 octane w/ auto trans and 91 octane w/ manual trans per the owners 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.

Is it OK to mix 87 and 89 gas?

You wont damage your engine at all if you use a higher octane - youre just wasting money. In North America, service stations blend the higher octane (like a 92 or 93) with a lower octance (87) for the mid-range fuels (89-91) so youre really not getting your moneys worth.

Can you mix 87 and 90 gas?

It wont make your car perform better, go faster, get better mileage or run cleaner. If your car was designed to use 87 octane fuel and you use 90 octane, it is likely that the engine will not perform better.

Are high idle hours bad?

Typically, engines idle at about 600-800 rpm. Older engines may go up to 1200 rpm or more while warming up. But if the engine is revving up while idling, even after its sufficiently warmed up, you might have a problem. High idle speeds waste fuel, cause extra wear and tear on your engine, and can be unsafe as well.

Should I let my Hemi warm up?

Idle time is not good for these engines. They have to low of oil pressure/flow at the set idle RPM. So keep warm up time to a minimum. Best thing is to let the high idle go down (about 1 min) and then Drive like you have a cup of hot coffee on your dashboard for a while.

Can you put 87 octane in a 5.7 Hemi?

Basically, a fuels octane rating is the measure of how much compression a fuel can withstand before igniting. ... 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!

What happens if you mix 87 and 91 gas?

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), dont worry. ... Youre actually filling your car or truck with a different blend of gas, which means it will burn differently in your engine.

Which gas is better 87 or 93?

Regular gas is rated at 87 octane in most states, while premium gas is often rated higher at 91 or 93. ... Essentially, the higher the octane rating, the lower the likelihood that detonation happens at the wrong time. On occasion, this occurrence will likely not harm your vehicle.

The octane requirements of a vehicle vary according to the compression ratio of the engine. The Chrysler Hemi is a relatively high-compression engine and requires fuels that adhere to the manufacturer's recommended octane rating.

Higher-compression engines create greater cylinder pressures and heat and therefore require higher-octane fuels to prevent pre-ignition, which results in pinging, knocking and possible damage to the engine. Each version of the Chrysler Hemi engine has a recommended octane rating for optimum performance. The minimum acceptable octane represents the lowest octane that these engines can be operated with without significantly degrading performance or risking damage from pre-ignition.

What kind of gas should I use in my 5.7 Hemi?

The use of fuels with octane ratings above the highest manufacturer's recommended level will not result in any increases in performance. The manufacturer-recommended octane levels therefore reflect the fuels the manufacturer specifically designed the engine to work best with, and deviation from these recommendations will not result in any added benefits and may result in lowered performance and reduced fuel economy.

What kind of gas should I use in my 5.7 Hemi?

This higher compression causes the engine to require a higher octane fuel in order to produce its maximum power and avoid the problems with knocking and pinging that are associated with high-compression engines if fueled with low octane gasoline.

Base Hemi engines mated to a manual transmission experience slightly higher cylinder pressures periodically. Because the driver controls the shifting, the loads placed on the engine can be inconsistent and occasionally higher than with an automatic as the engine is forced to work harder.

6 Best Recommended Oil For Dodge Ram 5.7 Hemi Review In 2022

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. When the Hemi is matched with an automatic transmission, Chrysler recommends 89 octane fuel for peak performance.

Paul Novak is a freelance writer specializing in Web content creation. He has owned his own business for seven years, and has for 10 years written on a variety of subjects from politics to the paranormal.

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