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Here is the latest oil analaysis on the supercharged Ranger, which now has 124,500 miles. Last change I switched to M1 0W30 (previous had been M1 5W30) to see if there was any change in performance or mileage. I did see a mileage increase of between 0.5 and 1.0 mpg over the life of this oil, and...

Here is the latest analysis on the supercharged Ranger. I dropped to 10k miles only because I have been driving the Ranger a little less (business is down and I've been driving one of the SHOs more), and the 6 months were up. I had located and apparently stopped a few small intake leaks, which I...

Ranger 4.0 sohc w/ 102,000 miles. Mobil 1 (standard) 5W30 w/ 12,000 miles oci, no oil added during the oci. miles 102k 90k AL 11 15 CR 2 4 FE 29 44 CU 13 12 PB 1 0 SN 0 2 MO 91 88 NI 1 1 MN 1 1 AG 0 0 TI 0 0 K 1 1 B 50 53 SI 13 14 NA 21 22 CA 2426 2424 MG 17 16 P 683 650 ZN 854 798 BA 0 0 SUS...

After all the to-do about Mobil 1 formulations, etc. etc. I decided to do another analysis of my oil (haven't done an analysis of M1 for a number of years, since they've always been very good even at extended drain intervals in my experience). This truck has 90k miles on it now, and has had M1...