There is another way of looking at a sleeper oil.
That is an oil that works unexpectedly well in a given application.
For example, I used some stashed, clearance M1 EP 15W-50 for the BMW's last change.
In the four tanks of fuel since, it has averaged over 30 mpg, which I have never seen on even two consecutive tanks before.
Now, a fifty is in line with what BMW originally recommended for most of its cars when mine was new, although the recommendations have been updated to oils meeting LL-98 or -01, all thick thirties or forties.
The sleeper aspect is how well the car has done on this thick fifty.
Not only is fuel economy good, but consumption has been nil.
I really regret having wasted fourteen quarts of this stuff in the Hondas.
I guess I finally found the right application for the remains of my stash of this oil.
It also makes me wonder whether the little thing might actually like the remains of my GTX 20W-50 stash, another grade BMW recommended back in the day.
That is an oil that works unexpectedly well in a given application.
For example, I used some stashed, clearance M1 EP 15W-50 for the BMW's last change.
In the four tanks of fuel since, it has averaged over 30 mpg, which I have never seen on even two consecutive tanks before.
Now, a fifty is in line with what BMW originally recommended for most of its cars when mine was new, although the recommendations have been updated to oils meeting LL-98 or -01, all thick thirties or forties.
The sleeper aspect is how well the car has done on this thick fifty.
Not only is fuel economy good, but consumption has been nil.
I really regret having wasted fourteen quarts of this stuff in the Hondas.
I guess I finally found the right application for the remains of my stash of this oil.
It also makes me wonder whether the little thing might actually like the remains of my GTX 20W-50 stash, another grade BMW recommended back in the day.
