I decided to go through with it. I have an LS1 Z28, in which I had a replacement motor with 35K miles installed last summer. After instillation, I did an auto-Rx clean then rinse cycle.
In November, I had M-1 EP 5W30 and the Wal Mart Fram Filter installed. The total oil added was 6 quarts (slight overfill from 5.5 reccomended). I also added ~3 oz of Auto Rx. I am now just over 12K miles and I have burned ~1.25 quarts of oil, but the dipstick still indictes that the sump is "In Operating Range", although at the bottom of it. I am running right out to 15K, which should be 7 and a half months total (~2,000 miles/month) I am adding no make up oil, as the dipstick does not require it. I want a true analysis of how well the original oil protects, with as little variability as possible. If I fall below "Operating Range" within the next 3-6 weeks, I will pull the plug. Frank from Auto Rx has offered to pay for 1/2 of the Blackstone Lab's analysis and I will post it as soon as I have it. Oh, also, I replaced the air filter with the "new" motor wit a total of ~23000miles so far. After the analysis, I will go to a 3,000 mile "Rinse phase" just incase the Auto Rx did some cleaning during this test. Then, possibly PP, or M-1 oe something which will allow me long drain intervals.
In November, I had M-1 EP 5W30 and the Wal Mart Fram Filter installed. The total oil added was 6 quarts (slight overfill from 5.5 reccomended). I also added ~3 oz of Auto Rx. I am now just over 12K miles and I have burned ~1.25 quarts of oil, but the dipstick still indictes that the sump is "In Operating Range", although at the bottom of it. I am running right out to 15K, which should be 7 and a half months total (~2,000 miles/month) I am adding no make up oil, as the dipstick does not require it. I want a true analysis of how well the original oil protects, with as little variability as possible. If I fall below "Operating Range" within the next 3-6 weeks, I will pull the plug. Frank from Auto Rx has offered to pay for 1/2 of the Blackstone Lab's analysis and I will post it as soon as I have it. Oh, also, I replaced the air filter with the "new" motor wit a total of ~23000miles so far. After the analysis, I will go to a 3,000 mile "Rinse phase" just incase the Auto Rx did some cleaning during this test. Then, possibly PP, or M-1 oe something which will allow me long drain intervals.