Rolled out at the top of the year, ConocoPhillips’ reformulated premium synthetic blend API CJ-4 heavy-duty motor oil, which is marketed under both Guardol and Kendall band names, has been proving the ...
ConocoPhillips Co. has introduced a premium, synthetic blend diesel engine oil, Guardol ECT, which was created to meet the CJ-4 standard for lubricants used in EPA-'07-compliant engines. Guardol ECT ...
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