I decided to put my oil to the challenge. I picked two tri-axle trucks off our lot. I ran Chevron 15W40 through one, and I ran CountryMark Advantage DEO 15W40 through another. At 10,000 miles, I pulled a sample of the Chevron oil, ran it through the Total Analysis Lube Scan program, and it came back flagged for soot. At the same time, I pulled a sample of the CountryMark Advantage oil. I ran the Advantage oil through the Total Analysis program and it came back clean. That truck was at 13,000 miles. I ran the test again on the CountryMark Advantage oil at 20,000 miles and it was still performing in the normal range. That’s twice as many miles as my old oil brand. Extended drains save me time and money, and that’s why I count on CountryMark Advantage Lubricants for my entire fleet. I’m very satisfied.
