2 Years Without Changing Oil?
95 that passes smog only gets driven 50 miles a month. The trips and environment warm up the oil on the dipstick beyond 120°F
Forum Discussion
jdc1 wrote:
LOL. Those 2018 cars sitting on the lots at your local dealer? They won't/don't change the oil just because it's a year old. Heck, that can of oil you just bought could be 5 years old....there's no expiration date on it....never has been, never will be.
They are also not "starting" those vehicles sitting on those lots for a yr either.. Often on those long term sitters they have to give them a battery jump start (yeah, I have seen that).
That does make a huge difference.
When you start ANY engine there is something called "blow by", that is a small leakage of burned and unburned gasses that get by the rings. Some of those gasses also condense on the cylinder walls and the oil control rings whisk that away and eventually that makes it's way down into the oil pan. That is normal and I would be concerned if there was not a slight leakage that would mean the rings were sized to tight..
That leakage is also greater when the engine is stone cold which is when the rings are at the smallest tolerances.. As engine and rings warm up, things expand and creates a better seal reducing "blow by" some..
You can easily store a engine for many years with oil in it with no harm as long as you changed it before storing and the oil was not old dirty used oil..
