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I just wanted to share a few interesting anecdotes. By no means am I saying the MC Yellow coolant caused any of these issues, but it's still interesting and figured worth adding to the repertoire on this site. Within the past couple of years I have switched 4 vehicles over from MC Orange to MC...

Notes indicated silicon could be an additive in the TRIAX. I might have just enough left in the 5 gallon pail for a VOA to check it out. There are no intake leaks that I'm aware of and the air filter is changed every 35K to 40K miles. This fleet vehicle sees almost entirely city/suburban driving...

First report on this vehicle. It is interesting to compare to my Taurus with the same engine though.

Flashpoint is much higher than I was expecting from Pennzoil Platinum. I've usually seen much lower than that, usually around 380F to 400F. Nothing too concerning here other than aluminum more than doubling. The notes indicated that hard use or frequent idling could cause that result. Last fall...

Nothing unusual for this fleet vehicle. I'd say around 6-7K miles for these engines is pretty good.

Nothing unusual or surprising. Not thrilled about the flash point. Interesting to see essentially identical viscosities and TBN between the two UOAs. The previous one was Pennzoil Platinum High Mileage 0w-20.

Nothing surprising here. Everything looked pretty good to me on this fleet truck.

Most recent UOA from one of the fleet Transit 250s. Looks pretty good to me. What do you think? Funny enough, though, just this morning this engine developed a misfire on the #4 cylinder. It's pulled from service an it'll be going to the shop next week.

Point of note: Fuel dilution continues to be seemingly random. Sometimes there's fuel, sometimes there's almost none, but only once was it ever considered in the "high" range. I have heard some remarks in the past questioning Blackstone's testing for fuel. Maybe someone who knows more than I do...

Latest report from one of my fleet vehicles. The previous UOA was RGT 5w-20, in case you're wondering. There was a slight concern with sodium previously, but it wasn't an issue this time around. I'm happy with the flashpoint and viscosity as well. All around, seems to be a pretty solid report...

Forgot to post this back in February. Iron has come back down to pretty close to normal levels for this engine. Fuel dilution jumped way up and I had never had an issue before. This engine has also started to burn oil since the previous UOA was done. It was down about 1/2 quart over 5,800 miles...

Another member wanted to see some UOA results for a 2.7L EB so I figured I'd post mine up in case anyone else was interested as well. Oils used by report date: 3/27/21 - Rotella Gas Truck 5w-30 10/3/20 - Rotella Gas Truck 5w-30 11/16/19 - Pennzoil Ultra Platinum 5w-30 11/3/18 - Motorcraft...

I posted the details of the story in the maintenance forum, but I was recently helping out an employee with her vehicle maintenance, including an oil change. She drives a 2016 Ford Fusion 2.5L. I basically just pointed her in a direction and gave her some resources, but the final decision on...

A few months ago, I hired a young woman (19 y/o) as an office assistant (working in admin). Over the past few months, she has noticed me doing some fleet maintenance and realized that I know a thing or two about taking care of vehicles so she asked me to help her out with hers. She drives a 2016...

Yet another 3.7L V6 with a possible coolant issue. Will be keeping an eye on this one as well.

Another Transit 250 in my fleet. A little more concerned about coolant in this one. Definitely going to keep an eye on this one.

UOA from the oldest Transit in my fleet. A little concerned about possible coolant contamination with this engine.

Latest UOA on this fleet vehicle. TBN is a bit lower than I had expected after only a little over 6K miles.

First UOA on this fleet vehicle. The next one will be around 8.5-10K miles and I'll start establishing a trend.

Latest UOA from one of my fleet trucks. Viscosity ended up a little low but not a bad report overall, IMO.