| for synthetics like Mobil1 to be: less frequent changes, but change the filter and top it off. Excerpted: "Engine wear actually decreases as oil ages. This has also been substantiated in testing conducted by Ford Motor Co. and ConocoPhillips, and reported in SAE Technical Paper 2003-01-3119. What this means is that compulsive oil changers are actually causing more engine wear than the people who let their engine's oil get some age on it." and "While the wear metals all accumulated steadily over the course of the test, the highest concentrations of accumulation per mile occurred in the first 3,000 miles of the test! From the 3,000-mile mark all the way to 18,000 miles, only lead showed an increase in per-mile wear beyond 3,000 miles. Yet even with an increased wear rate, lead wore the least in terms of absolute wear. For iron and copper, the longer the oil remained in service, the lower the wear rate got. In case it isn't obvious yet, this means that the most wear occurs in the first 3,000 miles. The filter change at 12,000 miles also substantially affected the wear metals. Though changing the filter by itself wouldn't have a significant effect on the concentration of metals -- the metals picked up in spectrometric analysis are too small for a filter to capture -- the amount of top-up oil required to fill the crankcase after the filter swap substantially alters the chemistry of the oil. Iron and lead didn't reach their 12k levels for another four or five thousand miles, and copper never reached its 12k level in the remainder of the test. It's easy to see here why proponents of extreme oil changes demand filter changes at regular intervals. Indeed, one is forced to wonder whether an engine with a high-quality PAO synthetic combined with a bypass filtration system and regular filter changes would ever need its oil changed at all."
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24"x46" Out of Print Limited Edition Dealer Poster
$40 plus shipping on fuji photo paper.
any size available upon request - send me an email.
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