Castrol Edge High mileage 5w30. I didn't intend to run this OCI out past 7,500, but as it turned out I ended up adding an entire quart of oil right at 7,000 miles and decided that was enough oil to run me out to 190,000 miles without having to add so I just went for it. total add oil for this OCI is 2 quarts. This OCI saw a lot of heavy towing all summer long. towed the camper 6 or 7 times and countless loads of hay all of which were in the 7,000 lbs range. also lots of highway miles at 75mph - 85mph. One 600+ mile trip hauling a 2,000lbs pop up camper to the hills. This was a summer OCI, where all the others below were winter OCI's, so it hints to some differences in wear from summer to winter. In the winter I'm not hauling trailers very frequently, but wear numbers look to be higher despite not being used as "hard" I'm not interested in pushing any of the oils I've used so far past the 10,000 mile mark. I replaced the Castrol HM with Amsoil XL. I figured if I'm going to run at 10k OCI's I might as well use a "10K mile rated oil." I've decided to just going to run 10k OCI's on this truck for the remainder of my ownership, which quite frankly is only one or two more OCI's and then its moving down the road to a new owner. Despite the "high" wear numbers, the engine appears to be in as good as shape as it was when I got it at 100k. oil consumption on 5w30 is the same as it was nearly 100k miles ago, and it doesn't make any more noise than it did at that time either (it was loud then and it is still loud). Power feels the same as it did when I bought it and it still has plenty of oomph to haul my camper around. I'd say I got my money's worth out of this fill, but I'm not going to go past 10k regardless of the oil. Here's the last 4 OCI's:
The higher TBN on the Mobil 1 HM above is part of the reason I decided to run this OCI out after adding the quart of oil at 7,000 miles. the TBN of 3.0 above is the result of adding a full quart 500 miles before changing the oil. seeing the TBN boost a fresh quart can add gave me the confidence to run it out another 2,500 miles it took to get to 190,000 miles (added a quart at ~187,000 miles and the plan was to change at 187,500). As always, I'm open to interpretations and opinions.
OIL Castrol 5w30 Mobil 1 Castrol 5w30 Castrol 5w30 Edge 5w30 Edge Edge High Mileage High Mileage Gold Bottle Gold Bottle MILES IN USE 9,787 6,856 9,060 9,980 MILES 190,041 172,300 158,145 149,085 SAMPLE TAKEN 11/8/17 02/18/17 06/16/16 01/14/16 Metals (ppm) IRON 51 110 71 88 CHROMIUM <1 2 <1 2 LEAD <1 <1 <1 1 COPPER 2 3 3 4 TIN <1 3 2 <1 ALUMINUM 11 27 12 19 NICKEL <1 <1 1 <1 SILVER <1 <1 <1 <1 TITANIUM 22 <1 21 20 VANADIUM <1 <1 <1 <1 Contaminants (ppm) SILICON 12 15 11 12 SODIUM 15 34 24 18 POTASSIUM 3 10 <1 <1 Additives (ppm) MAGNESIUM 85 1048 154 278 CALCIUM 2202 1375 1770 1990 BARIUM <1 <1 1 <1 PHOSPHORUS 648 900 637 648 ZINC 796 970 667 755 MOLYBDENUM 79 95 66 69 BORON 52 200 62 58 Contaminants WATER (%) <0.05 <0.05 <0.05 <0.05 Coolant No No No No Physical Tests Visc (cSt 100C) 10.3 9.0 9.0 8.9 TBN (mgKOH/g) 1.2 3.0 1.4 2.4