Edit: This is my first oil analysis and first post to the forum, so I apologize for the long post, but I figured I would get some history behind the truck in as well. TL/DR: Work truck for most it's life. Oil analysis shows unusually high elements indicating high wear. As in the title, this is a 1995 F-250 HD, 460 EFI with the E40D automatic transmission, 3.55 gearing. This is the first analysis I've ever had of the oil, and it was also the first run of full synthetic oil in the engine. I switched to Mobile 1 after my dad (farmer) switched his bulk oil delivery to our farm to 5W30 since all of our other vehicle require 5W20 or 5W30. The oil filter used during this interval was a Fram XG8A (I've since switched to Motorcraft, I was just using up what my dad had left on the shelf). The oil was put in at the end of May and was changed in the beginning of October after 3,000 miles. Around 1,100 miles were put on the truck while pulling a 28' 5th wheel camper. Because of the gearing in the rear end, I pull the camper in 3rd gear around 2,200 to 2,500 RPM. The miles were accumulated during a single day 550 mile trip in June, and a single day 550 mile return trip in October. The remainder of mile were driven on weekday trips of 30 mile round trip to work (rural highway) or 200 mile interstate trips every couple of weekends. At the oil change, my truck had just over 130,000 miles on the odometer. From 0-118,000 miles (fall of 2008) this truck was my dad's only work truck for our farm. Most of the miles were put on pulling a 20' hog trailer, anhydrous ammonia tanks to and from the field, and the combine bean head. This means that many of the miles were put on at low speed, high load with quite a bit of idling also. My dad always uses Fram oil filters, and he uses bulk oil delivered to our farm from a local co-op so I have no details on the oil. Between the fall of 2008 (118,000 miles) and this past spring (127,000 miles), I drove the truck during college so most of the miles were put on unloaded highway miles. Now, after that giant block of text, finally, the oil analysis:
This is what Blackstone left for comments for me:
Miles on Oil 3108 Miles on Unit 130,034 Sample Date 10/08/11 Makeup Oil 0 qts Elements in PPM Aluminum 6 Chromium 4 Iron 70 Copper 5 Lead 41 Tin 0 Molybdenum 94 Nickel 3 Manganese 1 Silver 0 Titanium 0 Potassium 9 Boron 45 Silicon 14 Sodium 12 Calcium 2338 Magnesium 136 Phosphorus 782 Zinc 826 Barium 1 Properties SUS Viscocity @ 210°F 60.3 cSt Viscosity @ 100°F 10.3 Flashpoint in °F 405 Fuel % <0.5 Antifreeze % 0.0 Water % 0.0 Insolubles % 0.3 TBN 3.7 TAN ISO Code
Since I'm still learning how to interpret these results, I'm just looking for general comments, and also wondering if there's anything I can do to help mitigate wear in the future.
Iron and lead both read high in this first sample from your F250. Our universal averages show typical wear for this type of engine after about 3,300 miles on the oil, so your wear should read a lot closer to average. Iron can come from any steel part, but lead is most likely from the bearings, so it looks like a bearing/shaft interface is wearing poorly. This may be related to the towing you noted, but we'll have to monitor trends in the next sample to get a better picture. The TBN was good, at 3.7 (1.0 is low), but for now stay around 3,000 miles and check back.