I suggest that all government vehicles be required to use an engine oil with a spec equivalent to Mobile 1 Extended Performance, which is guaranteed for 15,000 miles between oil changes. The engine oil in most government vehicles is changed every 3,000 miles. I use the oil I am recommending here in my personal vehicle, and do 1 oil change for every 4 to 5 that the government does on their vehicles. By the way, because ...more »
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