This index is essentially the opposite of the octane rating, where a high octane fuel resists spontaneous ignition, and therefore does not tend to ´knock.´ The cetane number of 100 was arbitrarily assigned to ´cetane´ or n-hexadecane, a straight-chain aliphatic chemical compound that burns very well, in the single-cylinder test diesel engine.
The strongest selling point to choosing the TDI Beetle over the other trim lines was that the gas mileage was out of this world!
For every 10% ethanol added to the fuel, a mileage loss of 3% should be expected.
How to save money by improving fuel economy and performance in any vehicle by up to 30% or more without expensive gadgets. Gas Mileage Bible is a must for anyone who drives a car. Simple scientific explanations on what causes losses and gains in fuel economy. Clear-cut gas-saving solutions, breaking down into straightforward categories: "no tech", "low tech", and "high tech".
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