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I've never done a UOA this early before in an engine's life, but thought I'd send it in to Blackstone out of curiosity. Needless to say, the numbers are alot better than I expected. I was a little skeptical of the low numbers at first, but after searching for other factory fill results here in...

Blackstone report for my '04 GMC Sierra w/6.6L Duramax. Miles on oil: 9976 Miles on engine: 121,345 Oil Filter: Mobil 1 M1-303 Air Filter: AC Delco Oil added: 1/2 quart Aluminum: 2 Chromium: 1 Iron: 8 Copper: 2 Lead: 1 Tin: 1 Molybdenum: 3 Potassium: 5 Boron: 1 Silicon: 6 Calcium: 3042...

I had a 1/2 quart of Mobil Clean 5000 5w-30 left over from the last oil change in my wife's Impala, so I thought I'd send in a VOA. (UOA on that sample was flagged for high sodium. Read other Clean 5000 VOA post for details.) Iron: 1 Chromium: 0 Lead: 0 Copper: 0 Tin: 2 Aluminum: 2 Nickel: 0...

I have a couple of older diesel tractors that call for a straight 30 weight oil. Lately, I've noticed Rotella 10w-30 at a few different stores in my area. Since these tractors see some pretty cold starts in the winter, I'd really like to give the 10w-30 a try. Do I need to be concerned with...

This was my first run with CI-4+ Delo 400 in my '04 GMC Sierra, & I'm pretty pleased, to say the least. 8,345 on the oil, & ~96k total actual miles on the engine. Aluminum, 2 Chromium, 1 Iron, 4 Copper, 2 Lead, 2 Tin, 0 Silicon, 7 SUS@210, 76.3 Flashpoint, 440 Fuel, Antifreeze, 0 Water, 0...

Thought some of you might be interested in these. Left to right, the oils used were: Delvac 1300 15w-40, Rotella syn 5w-40, Delo 400 15w-40, & Mobil 1 T&S 5w-40. All analysis' were performed at right around 8,000 miles. Alum: 3, 2, 4, 3 Chro: 1, 1, 1, 1 Iron: 8, 12, 14, 13 Copp: 3, 3, 4, 5...