Hi folks. I have been reading the Bob forum for years but never posted. I have couple interesting and rare oil analisys to show.
The first post will be from the oil analysis on July 2017. My next post will be from the current oil analysis but it will be in few weeks. The oil analysis here is for the 2015 Lincoln MKT 3.7 V6 stretch limousine. It was right at 100,000 miles and it was about year and a half of driving since new. Although this is 2015 model the beginning of its life was in January 2016 when I got the car would just few miles on it. Those cars go through serious body modifications as I'm sure you know. I drove the car in Chicagoland
area. So this car it's the definition of HEAVY DUTY USE. It's curb weight of 7950 lb it's pretty much like you're towing at all the time. With 9 passengers + 1 driver (me and luggage when going to airport) many times full grown men I can only guess what this car weights (10k lbs). And some of you might think this is a Highway use but you are totally mistaken. In Chicago traffic this car sees minimum of few hours of bumper-to-bumper drive 6 days in the week and the rest that are on the highway are usually loaded with people and driving 60 or 70 mph. Summer and winter. And another heavy duty thing is that I idle the car for hours. Sometimes up to 8 hours at a time. This is due to waiting for a client and it's either hot or cold outside so the interior of the car must be kept at normal temperatures at all the time. If outside is -20 that means the car will be idling and the heater on all the time regardless. They show up ready to go at random tomes. And vice versa if it's summer i keep the AC and car on all time. The car has two AC condensers and summers here arent as cold as winters. We have 90+ a lot. The car is being abused by me. I never drive like a old school limo driver. I floor this car multiple times a day. The car is being driven to Red Line on daily basis because when you accelerate on the highway exits you have to push it( you dont have to but it's nice) I use only 87 oct regular gasoline and only twice I can remember using premium to see what's the difference. I only and only use the Valvoline 5w 20 oil that comes in big metal oil barrels. This is not because I believe that's the best oil but because it is free of charge and is performed by the dispatch company. The oil has been changed only at 6000 miles plus or minus couple hundred. In this case the oil was 5700 and it was a little bit too early but I had no patience to wait so I changed it and waited for the oil sample. When the car was at 170k miles around June 2018 I forgot to do another oil sample because I got new car very fast. The new car is the same exact car but is 2018 model year with 3.5 V6 biturbo engine that I will do all oil analysis in couple of weeks and we will compare. Just for the protocol this is probably my 12th Lincoln and ever since they stop making the Old Town Car V8 engines we thought new V6s will not last as much. I was a little bit the wrong because it looks like they hold up very well and burn less Fuel and have excellent power and sound. Mileage wise maybe i was right the old V8 was a standard to hit 500,000 miles in the limo business in Chicago. Anything less than that is untypical. The V6 I believe will do 400,000 miles instead of those 500,000 based on what I have seen on other cars but I cannot confirm because I sold mine. But i am not sure about the trans. Probably will need a second one in its mid life.
So this is the result from the oil analysis and I leave the judging for the experts. Next time I will post the new engine oil sample and few pictures as well. :-)