TABLE 3-7: Retail Price Effects for Friction Reduction
Components in Four-Valve Engines
Roller cams
Lightweight
valve/springs
Pistons
Piston coatings
Total
4-cylinder
$17.20
31.20
10.20
6.70
$65.30
6-cylinder 8-cylinder
$24.20 $31.20
45.20 59.20
13.70 17.20
8.45 10.20
$91.55 $117.80
SOURCE: Energy and Environmental Analysis, Inc., “Automotive Technologies To
Improve Fuel Economy to 2015,” prepared for the Office of Technology Assessment, June
1995.