My lost-in-the-mail oil sample finally arrived at the lab (only 30 days late)
Here are two long runs on RP 5W20 API SL oil, plus a virgin sample, in a 2005 Ford F-150HD 4x4 pickup. Both were on the same batch of oil blended in 2009. One run was just under 7500 miles and at 14.5 months, the other at just over 10,000 miles and 22 months (nearly two years!).
My Evaluation: Stellar oil. Nothing to complain about. Very high viscosity and TBN retention. Wear metals very low and the numbers at 7.5K and 10K are very comparable. Though I have changed oil viscosity and brand for various reasons, I would not be afraid to run this oil again in a heartbeat.
I really liked the ANA Labs (www.analaboratories.com) report and their info. Their basics tests include TBN and they are Accredited by ANSI-ASQ.
RE Iron PPM- Note the virgin 3.7 PPM. I asked and was told that it's not unusual to see iron in virgin samples (from pipes, tanks, etc) and that you would deduct the amount in the virgin sample to get a truer pic of the engine sample.
Correction to Chart Below (call me lazy) TBN should read 8.20 not 8.93
Here are two long runs on RP 5W20 API SL oil, plus a virgin sample, in a 2005 Ford F-150HD 4x4 pickup. Both were on the same batch of oil blended in 2009. One run was just under 7500 miles and at 14.5 months, the other at just over 10,000 miles and 22 months (nearly two years!).
My Evaluation: Stellar oil. Nothing to complain about. Very high viscosity and TBN retention. Wear metals very low and the numbers at 7.5K and 10K are very comparable. Though I have changed oil viscosity and brand for various reasons, I would not be afraid to run this oil again in a heartbeat.
I really liked the ANA Labs (www.analaboratories.com) report and their info. Their basics tests include TBN and they are Accredited by ANSI-ASQ.
RE Iron PPM- Note the virgin 3.7 PPM. I asked and was told that it's not unusual to see iron in virgin samples (from pipes, tanks, etc) and that you would deduct the amount in the virgin sample to get a truer pic of the engine sample.
Correction to Chart Below (call me lazy) TBN should read 8.20 not 8.93
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