Although roots superchargers have significant parasitic load and do dramatically decrease fuel economy, centrifugal superchargers will yield approximately the same fuel economy as normally aspirated engines, under normal throttle conditions. When racing, however, fuel enconomy will decrease given the supercharged engine's ability to consume additional fuel and produce additional horsepower.

There is a relationship between air filter restriction and mileage. The theory behind this is simple, the harder an engine has to work to suck air through the intake tubes and air filter, the more gas gets wasted in the process. Replacing a dirty or clogged air filter is one of many recommendations the U.S. Department of Transportation suggests for improving fuel economy (see http://www.fueleconomy.gov/feg/FEG2007.pdf). See similar questions...

Many people claim that Biodiesel will increase your fuel economy by 5%. It is possible that this is true due to higher lubricity and a higher BTU content than #1 Diesel fuel. We have no data to back these claims. Generally speaking Biodiesel offers you the same power, consumption, horsepower, torque, and hauling rates as conventional diesel only with far less environmental consequences. See similar questions...

EPA estimates are based on laboratory tests conducted by manufacturers according to federal regulations. EPA re-tests about 10% of vehicle models to confirm manufacturer's results. For more detailed information, visit our page on How Vehicles Are Tested. See similar questions...

If your fuel economy is excessively low, your vehicle may need to be serviced or repaired. You may want to contact your dealer or a reputable repair facility to check your vehicle. See similar questions...

That depends on how big a cliff you push it off of! Seriously, it varies quite a bit, depending on speed, wind, and fuel type. We can depend on a solid 18 liters/100 kilometers (13 miles/gallon) over long Interstate highways at 100 k/h (65 m/h). We've calculated as good as 16 l/100km (15 m/g) at highway speeds with a nice tail wind. Biodiesel seems to be slightly less, straight vegetable oil (SVO) seems to be slightly more. See similar questions...

Fuel economy is not compromised when utilizing the Magna Charger supercharger system equipped with our standard bypass system. EPA (environmental protection agency) figures support this claim. A typical domestic vehicle equipped with an Magna Charger supercharger shows no fuel economy penalty for highway driving, and only a one-mile per gallon penalty for city driving. See similar questions...

The impact on gas mileage depends on several factors, including the rider, style of riding, passengers or cargo weight, and geography. Some trike owners report negligible changes in fuel economy, while others may experience a 5-10% reduction. Order our optional Auxiliary Fuel Tank to increase your range. See similar questions...

You have to ask??? Seriously, the more "stock" the engine is, the better the mpg. You could get 14-18 mpg out of a low horsepower 390, but with 550 bhp, you'll probably get 8 mpg. If you want the best reliability, stick with a stock engine. Unless you throw a lot of money at an engine, higher horsepower will always result in higher maintenance. See similar questions...

No test can accurately predict fuel economy for all drivers and all driving conditions. Driver behavior, driving conditions, vehicle maintenance, fuel characteristics, weather, and other factors can all affect fuel economy significantly as explained here. See similar questions...

Ans: The standard Supercharged V6 engine runs an air-bypass valve located near the inlet duct of the supercharger. This was designed primarily to improve fuel economy and idle quality for light throttle applications. With our boost pulley kit the functionality of this bypass valve is retained, meaning that light throttle applications during cruising will still be drawing air through this bypass valve and not using the increased boost at all. See similar questions...

Under typical operating conditions there should be no noticeable impact on the overall power of the vehicle. The reduction in energy content in ULSD could result in reduced fuel economy by some estimates of about 1%, which is within normal variability of diesel fuel. See similar questions...

It will. Reduced friction means better fuel efficiency with Tufoil. In spite of the wide variations of engines and drivers, independent tests have shown significant improvement with Tufoil of well over 5%! See similar questions...

optimal management and a lack of cost overruns, like those resulting from the different size of the rail tracks between the northern and southern areas of Bidasoa, can make this kind of transport three times cheaper than transport by road. Thus, Basque products will arrive much further. See similar questions...

It is worthwhile to note that the Chalet is a prime example of 1970's technology, or rather, lack thereof. While it features electronic ignition and power steering and might have cruise control, you should not expect the luxuries of today's vehicles. This includes fuel economy. Between a big V8 engine, and an aerodynamic coefficient of a brick, you should expect single-digit mileage. Driving style also affects mileage; above, say, 65MPH, you can watch the gas guage drop. See similar questions...

A. Fuel economy with the RICA ECU upgrades will improve in 99% of cases. Expect approximately 10% better fuel economy. Most of our customers have seen an extra 4 - 6 mpg. See similar questions...