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Discussion Starter #1
well... sometimes if the shop is real dead the corporate guys at Chevy will pay someon to come in and tell us what to look for so we can sell stuff better...

and today they did just that

they brought us 2 GM 2500's with 100,000 miles on them...

truck A.. had its oil changed every 3 K... full syntec for 100'000 miles

truck B had reg oil changed every 10% on the gadge

the motor in truck B was a block of sludge tho it still ran it was much less efficient then truck A

truck A's engine looked like it had just been rebuilt... it was THAT CLEAN
ran like a too... no shakes like it just come off the line


yet another reason to change year oil evey 3K
 
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