# How do you calculate fuel consumption from RPM?

## How do you calculate fuel consumption from RPM?

Actual fuel consumption will vary according to differing road, load and speed conditions, the position of the throttle will have to be adjusted and gears changed to maintain either the same road-speed or RPM reading, with more fuel being delivered the higher any of the above are added to the equation.

### How do you calculate fuel consumption of a diesel engine per hour?

Simple Method

1. Formula To Estimate Maximum Engine Fuel Consumption. Gallon Per Hour (GPH) = (specific fuel consumption x HP)/Fuel Specific Weight.
2. 300-hp Diesel Engine Example. GPH = (0.4 x 300)/ 7.2 = 105/7.2 = 16.6 GPH.
3. 300-hp Gasoline Engine Example. GPH = (0.50 x 300)/ 6.1 = 150/6.1 = 24.5 GPH.
4. Other Related Resources:

How much fuel does a diesel engine burn per hour?

On average, an in-tune four-stroke gasoline engine will burn about 0.50 pounds of fuel per hour for each unit of horsepower. Likewise, a well-maintained diesel engine burns about 0.4 pounds of fuel per hour for each unit of horsepower it produces.

How do I calculate HP fuel consumption?

Expressed as a formula it looks like this:

1. Given Horsepower x .50 lb fuel/hp = lbs of fuel for given horsepower.
2. 200 lbs/hr / 6.25 lbs/gal = 32 gph.
3. BSFC . 50 / 6.25 = . 0800 gallons / horsepower / hour.
4. OR.
5. BSFC .70 / 6.59 = .106 gallons / horsepower / hour.
6. 800 * .106 = 84.80 gph.

## How do you calculate diesel consumption?

The following formula is used to calculate fuel consumption in litres / 100kms, the most commonly used measure of fuel consumption. (Litres used X 100) ÷ km travelled = Litres per 100km.

### Does RPM determine fuel consumption?

The higher the rpm, the more torque the engine is producing, and the more fuel it is using. Automatic transmissions take some of this control out of the driver’s hands, but they, too, can be manipulated to maximize fuel efficiency.

What is specific fuel consumption of diesel?

The lower the brake specific fuel consumption, the more efficient the engine is. For spark ignition (gasoline engine) the BSFC is around 250 g/kWh and for compression ignition (diesel) around 200 g/kWh.

What is good fuel consumption?

Anything that is listed as less than 6-litres/100km or more than 16.5km/1-litre is considered to be pretty good. The first (and most common) reference is litres per 100km (litres/100km). In this instance, the higher the number of kilometres travelled the more fuel-efficient.

## What RPM should I run my diesel engine at?

For the best fuel efficiency, keep your RPMs between 1,500 and 2,000 RPM when driving at a constant speed.

### What RPM is a diesel engine most efficient?

Most diesel engines have the peak torque produced between 2000 – 2500 RPM. Maintaining your RPM at around 2000 RPM will give you the maximum efficiency and will also keep the engine rev happy. Try and quickly up shift to higher gears, so that you can maintain a lower RPM at high speeds.

How do you calculate the fuel consumption?

Divide mileage by fuel usage to see your car’s fuel consumption. This tells you how many miles you drove per gallon of gas. For example, if you drove 335 miles before refueling, and you filled your car up with 12 gallons of gas, your fuel consumption was 27.9 miles per gallon, or mpg (335 miles / 12 gallon = 27.9 mpg).

How is diesel consumption calculated?

Simply note down the distance travelled since the last top-up and then take a note of how much fuel it consumed to travel that distance, then divide the litres used by the kilometres travelled and multiply by 100 to calculate consumption in litres/100km.