The Slippery Truth About Motor Oil
|
Most GM engines from about 1987 forward have hydraulic lifters with roller bearings that greatly reduce frictional contact. Many aftermarket camshaft manufacturers offer similar roller-type camshafts for our vintage Pontiacs. Because these camshafts are typically made of harder material and the roller bearing on the lifter face reduces friction, it appears they are unaffected by the recent oil changes. View Related Article
|
|