broken in before using Mobil-1. What gives?
To correct my original statement, Mobil 1 recommends the use of synthetics in newer cars “after the first recommended oil change.” This seems to cover the break-in period. The LT1 engine in the Corvette has tolerance specifications which were designed for the synthetics at mile 0, or the engines are broken in before hand…. Synthetics make the largest impact in Turbo cars, or cars which experience difficult driving conditions. Both Mobil and Quaker State, recommend their conventional motor oils for normal driving conditions, and their synthetic oils for extreme driving conditions (Turbo’s, cold/hot/dirty environments, and competition use). To guarentee long engine life, one should change the conventional oils more frequently than the manufacture’s recommendations. Synthetics seem to easily go twice the recommended interval (up to 15k miles), while the filter should be replaced every recommended interval.
