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:blink: 100k pampered miles on this truck. Started making 'dry start' noise in upper engine last year after 1500 miles on oil; now it starts at 500 miles on new oil. Oil PSI is in limits, using 10 30 valvoline; now. Noise goes away after new oil change. When it starts to bark, its a lifter which quiets after 1 minute; progressing worse in noise and time to clear. A few days later it sounds like a blown engine at which time I change the oil; and its back to a new engine. What the heck is it????
Steve In Plymouth, MA
 
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