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.
Sonex intends to conclusively demonstrate that SCS-SCRI will enable GDI engined vehicles to achieve 50 mpg (highway) while meeting emissions standards to permit sale in the State Department of Taxation officials have announced that state standards are the same as federal standards for mileage rates for computing deductions for operating automobiles for business-, charitable-, medical- and moving-expense purposes.
I own a 95 gas wagon and over my year-and-a-half experience (around 17k miles) during which I consistently tracked and calculated fuel economy at every fill-up (and there are a LOT of ´em in there, believe me), I have never realized less than 9 mpg for a single tank of gas.
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