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Tonight I decide that while my wife is grocery shopping next door at Whole Foods, I'll go into Pep Boy's and purchase my Penzoil Fully Synthetic that Terry Dyson recommended for my oil change. I mosey on in and go back and get 8 qts of the good stuff. Cleaned the shelf bare. As I am approaching...

Even though my "gut feeling" was telling me that 10K miles was too long, even for M1 EP, I still pushed it so that I could have a Dyson Analysis with a 10K usage. My Tahoe has 70K miles and is driven normally. Not papmpered, but not abused. Off road, 4 wheel regularly, tow in the mountains at...

This is the third analysis of Amsoil S2K 0W30 in the vehicle with 42,972 miles total. 4,435 miles on oil. Oil changed at sample. Iron 10 CH 1 Lead 16 CU 31 Tin 0 AL 5 NI 0 Silver 0 Silicon 7 Boron 46 Sodium 4 Magnisium 844 Calcium 2051 Barium 0 Phosporus 1091 Zinc 1319 Moly 4 Fuel, Water...

Just a thought. Some folks seem to be very picky about the viscosity, additive package, UOA etc... but when it comes to the gas???? Do you use the same station, the same pump, premium fuel or do you just use whatever is the cheapest on sale? Cheers, Doug

Here's an update on my oil situation regarding the "abnormal" oil analysis on my 2001 Tahoe 5.3L using Amsoil S2K 0W30. I wrote a letter to AJ Amatuzio addressing the abnormal analysis and the possible cause being use of PowerFoam. I requested that Amsoil replace the 6 qts of S2K 0W30; Filter...

I know this has been beat to death; However, now that I have gotten over the shock and awe of my most recent UOA and the abnormal indications on viscosity and aluminum with S2K 0W30, should I return to my roots and go back to Mobil 1 or stay the course and put another round of S2K in my engine...

Now I'm worried. This is the first oil sample of Amsoil S2k 0W30. I was expecting outstanding results; now I am doubting and ready to go BACK to Mobil 1. ALL COMMENTS APPRECIATED!!! Here's the M1 and the S2K results: ................ M1 0W30 ........... S2K 0W30 Sample Date .... 14 JUL 03...