Recently got a new UOA from Blackstone for my 2016 Ford Mustang GT. This is the supercharged 5L V8 coyote engine, car is a track toy. It's had some additional modification since the last UOA to increase power output. It's now running with a custom fuel system on straight Sunoco 260 GT Plus race gas. The oil used was Motul 300V Chrono 10W40 and the car was mostly getting miles from test/tune as I worked on it. Here is what it came back with:
Date Sampled: 02/04/2019 Report Date: 03/12/2019 Miles Used: 919 Miles Engine: 6,343 Lube Changed: Yes Filter Changed: Yes Lab Name: Blackstone Laboratories Fuel Dilution <0.5% Vol Soot <0.3% Vol Water 0.0% Vol Glycol 0.0% Vol SUS Viscosity 70.0 cSt Viscosity 12.96 Flashpoint 420 F Iron 12 ppm Chromium 0 ppm Nickel 0 ppm Aluminum 2 ppm Copper 5 ppm Lead 25 ppm Tin 0 ppm Silver 0 ppm Silicon 12 ppm Sodium 7 ppm Potassium 5 ppm Titanium 0 ppm Molybdenum 583 ppm Manganese 191 ppm Boron 21 ppm Magnesium 93 ppm Calcium 2,330 ppm Barium 0 ppm Phosphorus 1,043 ppm Zinc 1,111 ppm
The race fuel I'm using is supposed to be unleaded, but I was getting the fuel from a shop that cleaned and recycled drums (55 gal) and had them filled at some distributor near town. While using that vendor my UOAs were all showing twice as much lead as this UOA! I have a feeling they were cross-contaminating fuel with leaded race gas when recycling the drums. It doesn't take that much lead to make that ppm, so maybe they just weren't washing the drums between customers. I wound up switching vendors midway through using this oil to one that sells pristine branded factory drums (for the same price!), so I think this is why that lead number got cut in half this UOA. + The manganese is from the race gas, it's the octane booster MMT that's used in unleaded race gas. Overall I think it looks like a solid oil. Unfortunately Motul has discontinued it. I'm probably going to switch to their new 0w40 or similar racing product once my stock runs dry. What do you guys think?
Thanks for the notes. Lead is probably from the fuel you used and that's fine. High-octane fuel typically has lead in it and if you were to only use standard unleaded pump fuel, we wouldn't be surprised if lead dropped like a rock. We're confident these engines don't have lead bearings (or any lead parts) so don't let it bother you. Other metals look great and no harmful contamination was detected. The viscosity was correct for 10W/40-grade oil and the 0.3% insolubles show the oil filter did a great job with oxidized solids. Excellent report at 6,343 miles.
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