Quote:
Originally Posted by Deezler
Or, using my car as an example, how the diesel engine is epa rated at 44 mpg while the 2.0L gas is rated at 29 mpg. (52% better mileage with 12% more btu's per gal.
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The EPA adjusts for the energy content of the fuel, so that's straight up 52% better mileage.
Quote:
Originally Posted by Deezler
Before the EPA decided to lie about average diesel fuel economy, the stickers showed a 58% advantage for the diesel engine.)
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Lie? All the EPA did was change the ratings to reflect higher speeds, accessory use, and more aggressive driving in general. An average of 48mph with a high in the low sixties on the highway just doesn't cut it anymore as an accurate yardstick of driver habits. Granted, SI engines came out of this comparison better due to higher average load/fewer throttling losses, but diesels still have a ~35% advantage all things being equal. Saying the EPA lied about anything is at best erroneous and at worst nothing more than rhetoric.