High Mileage oils are formulated to deal with high mileage elastomers that shrink with heat and time and wear.The bottle of HM says seal conditioner not swellers
Looks to be about M1HM to me.
It shouldn’t be, if that’s the case then it’s a poorly designed test. One would hope the test stand routine would model typical driving habits.500K on an engine running on a stand in a lab is totally different from a 500K engine in a daily driver.
That test rig is one seriously great piece of engineering. GM has one, too. I used to watch the LT4 V8 running on it back in 2014.It shouldn’t be, if that’s the case then it’s a poorly designed test. One would hope the test stand routine would model typical driving habits.
You know, something like this
500K on an engine running on a stand in a lab is totally different from a 500K engine in a daily driver.
This test is still in a controlled lab. MUCH different environment than a daily driver who even changes every 3K.View attachment 26622
10,000 miles @ 65 mph is ~154 engine hours.
500,000 miles @ 65 mph is 7,692 engine hours.
The average person will average about 33 mph, or at least that is the number I have seen thrown around a lot. I have seen some companies use 25 mph as their number to determine maintenance schedules based around hours of operation instead of mileage (for stationary use vehicles and equipment).
Now, let’s assume 33 mph for the average driver:
A consumer passenger car accumulates 7,692 engine hours while averaging 33 mph over the life of their car. They have put as many engine hours on their car as Mobil put on their test car, but the consumer car only has 253,836 miles.
The Mobil 1 test car has received an oil change every 154 engine hours @ 10,000 mile intervals.
The Consumers car has also received an oil change every 10,000 miles, but has put on ~303 engine hours, almost double the engine hours of the test car. Also remember that the consumer car is started and stopped many times over an OCI.
Based on the numbers Mobil gives us, you could also call into question their 20,000 mile EP oils. Are they good for 20,000 miles at 65 mph (~308 engine hours) or 30 mph (~667 engine hours)? Their testing may indicate that the oil provides adequate protection for 300 hours (20k miles at 65 mph), but how does that translate to the real world conditions with idling in traffic, high RPM WOT runs merging into traffic and multiple daily starts and stops with many cold to hot thermal cycles ?
Running at 1,900 RPM in nearly constant hydrodynamic lubrication for 12 months isn’t what a car is going to experience in the real world. Remember that the are only a little over 8,700 hours in a year, the Mobil team put almost 7,700 engine hours on the test car in 12 months. This car was kept at operating temperature, which is easy on the oil and produces less wear and tear within the engine. Most engine wear occurs at startup. (Source)
View attachment 26623 View attachment 26624
Now for a real world, personal example:
My last vehicle was a 2007 Toyota Tacoma with the 4.0 V6.
10-20-2017: Oil and filter changed, 82,653 miles. Hour meter reset to zero.
4-26-2018: Oil and filter changed, 84,668 miles: 185 hours and 7 minutes of runtime since the last OCI.
I had driven 2,015 miles and accumulated 185 engine hours. My average speed for that OCI was 10.89 MPH.
If I had put that same number of hours on my engine under Mobil’s test conditions (@ 65 MPH), I would have traveled 12,025 miles.
View attachment 26628
There is nothing there to suggest the test was made in "a controlled lab":This test is still in a controlled lab.
It took place at XOM’s facility. A car running under lab scrutiny is a completely different environment vs the average non-car enthusiast owner. For example my old neighbor who’d get in her Mustang on a cold morning and have it full throttle literally before the starter had a chance to quit spinning. That car smoked all the way to the top of the street.There is nothing there to suggest the test was made in "a controlled lab":
High Mileage Challenge
"engineers eventually chose one of the most popular models around, a 2015 Toyota Camry "
“All of the testing for ‘The 500,000-Mile Challenge’ took place at the ExxonMobil Research and Engineering facility in New Jersey. The Camry was run at highway speeds for 12 months, and oil changes were performed every 10,000 miles with Mobil 1 motor oil. Engineers on the ExxonMobil R&D team monitored engine performance from mile one to mile 500,000.”
ExxonMobil has multiple tracks for running actual vehicles under a wide range of conditions.
This is the nth version of a long-range actual vehicle run I have seen Mobil 1 advertise over forty years or so, including some with taxi and/or police fleets.
That's not real-world testing either, that's idiocy.It took place at XOM’s facility. A car running under lab scrutiny is a completely different environment vs the average non-car enthusiast owner. For example my old neighbor who’d get in her Mustang on a cold morning and have it full throttle literally before the starter had a chance to quit spinning. That car smoked all the way to the top of the street.