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I run UOA's every change. Schaeffers oil scope has me up to 12,000 mile intervals. This is on a 6.0 powerstroke with 202,000 miles with Scheaffers for the last 145,000miles. I have no problems with rotella T, I still run it in my 1997 7.3 powerstroke with 397,000 miles that runs great. Im...

I have used Schaeffers 7000 for years in many diesel engines an I will most likely keep using it but......With this new 15w-40 T6 I have been seeing, a guy gets to thinking, is saving nearly $12 a gallon worth the switch from Shaeffers 7000 to Rotella T6? $12 a gallon savings really starts to...

No this truck has been maintained and taken care of. Previous owner had a egr cooler, oil cooler, and all injectors replaced under ford warranty. When I bought the truck he also gave me a journal he had kept on the truck, it had everything right down to when he replaced the windshield wipers. I...

Just had this test run on a sample of my Rotella T 15w-40 run in my 6L powerstroke. I went 7,500 miles on this change, I would say 90% of these miles are highway miles. Truck truck had 140,000 at this change. So how does the sample look? This is the first test I have ran on this truck so I have...