I remember this one day a lady brought in her mid 2000s E class sedan looking to have her brakes checked. After getting her all checked in, I went out to the vehicle to bring it into the shop. What flashes up at me in typical MB fashion? The FSS counter! What does it say? -26500! As in...not oil changed 26,500 miles ago. No..oil DUE 26,500 miles ago. Meaning oil was CHANGED 36,500 miles prior to this date in time...lord knows how many YEARS that was.
I get it into the shop thinking, huh...sounds ok..maybe she takes it somewhere to get her oil changed that doesn't know how to reset the MB FSS! Pop the hood, take off the oil cap first. Oh. Maybe...this oil has been here for a while. Pull the dipstick. Oh..its amazingly FULL...but filled with TAR. I'm talking GREASE. Heck, evaporated, charred grease.
Well of COURSE when I brought this issue up, she immediately got very defensive about the issue, asking why I'm being nosy, so forth. Once I got through that stage, we eventually arrived at the conclusion that she didn't know oil had to be changed 'so frequently', and that she never paid the FSS screen any mind.
When we removed the drain plug...it actually took a moment for anything to come out...and once anything did come out, it was like tapping a maple tree for syrup.
I wish I had pictures of the filter...that had clumps on it.
Anyways. When I used to own slightly older vehicles, I would always make it a solid habit to pop the hood regularly, checking all the fluids. With my Ford, I've popped the hood more than 5 times and less than 10, most of those times were to add washer fluid and do nothing else.
I got the car at 35k last year. I'm continuing the tradition of driving the [censored] out of it, currently with 56k miles after only 8 months of ownership. I changed the oil right after I got it around 37k, filling it with SynPower at my workplace, and following the oil life monitor down to 5%, changed it again at 48k in Oct 2012. It's now at 15%...due for a change.
I'm thinking Amsoil this time around. But shoot, if Ford's calculations say 10,000 miles are acceptable on regular oil, and AMSOIL is only good for 25,000 miles, then regular oil would be approximately 0.001 cents/mile cheaper than AMSOIL and 0.0025 cents/mile cheaper than store bought synthetic.
Since the Duratec 3.0 has a typical life of only 200k miles...I sort of want to see if that can be extended reasonably with synthetic oils and other proper maintenance. I'm just used to the GM 3800 that, with proper maintenance, unabused, has a nearly unlimited lifespan.