Thank you! Found the Chevron's original document, total 124 pages! http://www.chevron.com/products/ourfuels/prodserv/fuels/documents/69083_MotorGas_Tech Review.pdf Ken@Japan
Is this indicating that driving uphill, on a 7% grade, 'average' FE reduction is only 1.9%? Maximum reduction is only 25%? Sorry, but my Subaru sees at least a 50% reduction, according to ScanGauge. My Prius is much worse, due to its greater flatland efficiency. A 2001 report can be excused for missing the hybrids, but the highest efficiency non-hybrids from the 1980s should have reductions close to current hybrids. Or are they showing a reduction for a round trip up and down 7% grades?