hondo434
You were on the right track but you didn't finish your experiment. AND you let other variables affect your test which meant it was uncontrolled. You can only change one parameter at a time. Example: Do you know what your tire pressure on all 4 tires is at this moment? What was it during the test? If you didn't control this one variable let alone all of the others it isn't scientific. Tire pressure alone can have a great affect on your MPG. It will not affect your oil cleanliness though.
|