3.7 litres. (with filter)After refill check oil level.

A Honda Civic can get an extra 44 miles on empty while a Toyota Corolla gets an average of 47 miles on empty.

Compare Side-by-Side

GasolineCompressed natural gas

Can you put premium gas in a Honda Civic? Technically, yes. But many vehicles have engines which are designed to withstand a certain amount of wear and tear. So, for most vehicles, choosing a premium gasoline won’t make much of a difference.

Your gas millage should not be affected by using 89 instead of 87. It will only if you have high performance plugs and wires. The higher octane is designed to be a little cleaner. It can go both ways, but if you are running a stock Civic , then use the 87 because the car is built for 86 or 87 depending on your engine.

Using a higher octane than necessary If you opt for a higher octane than your manual recommends—say, 89 instead of 87—your car will be perfectly fine, an article on AAMCO’s blog explains. It will not, however, improve your car’s mileage or give it any sort of extra performance boost, according to Car Talk.

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’re actually filling your car or truck with a different blend of gas, which means it will burn differently in your engine.

A higher octane rating indicates greater resistance to knock, the early combustion of the fuel-air mixture that causes cylinder pressure to spike.

The higher the fuel’s octane number, the more resistant it will be to knock. Higher-octane fuels allow engine manufacturers to design more powerful and fuel-efficient engines.

Whether it’s worth the extra cost is debatable. Certainly, for someone driving a small-to-medium sized engine, using premium fuel regularly is a waste of money. It won’t provide extra power or speed – it just costs you more at the pumps.

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.

How to Increase Mileage on a Dodge RAM 5.7 HEMI

1. Change your RAM’s oil every 3,000 miles or at least every three months. This keeps the engine clean and running well.
2. Get a tune up.
3. Avoid letting your Doge idle for long periods of time.
4. Check your tires often.
5. Avoid accelerating quickly.
6. Check your air filter.

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. Ethanol is a great fuel source, however, not really meant to be run in our motors.