Is there any benefit to an oil change?

Discussion in 'Mechanic and Repair' started by casey, Sep 6, 2001.

  1. casey

    casey Guest
    Messages: 0

    Is there any benefit in an oil change on a unit that had fresh oil put in before going into storage & has sat for over a year?
  2. Cleve

    Cleve LawnSite Senior Member
    Male, from Rockmart, GA
    Messages: 404

    Probably not.
    But funny things happen when units are stored unused for that length of time. Condensation can form in the crankcase from temperature changes and that can cause problems in the oil.
    I think I would start the engine and after warming up I would change the oil. Just to be safe.
  3. casey

    casey Guest
    Messages: 0

    If the oil will be changed after long term storage due to the possibility of condensation, is there any point in an oil change before the unit is stored?
  4. cantoo

    cantoo LawnSite Silver Member
    Messages: 2,910

    A couple of litres(quarts) of oil cost next to nothing compared to the cost of a new or rebuilt motor, cheap insurance.
  5. linky

    linky LawnSite Member
    Messages: 151

    I would be concerned storing an engine with dirty oil. It seems to me that the dirt in the oil would settle to the bottom and cause or add to sludge build-up.
  6. Dochere

    Dochere LawnSite Member
    Messages: 137

    Cantoo and Linky both make good points, also, oil does have a shelf life. Better be safe than sorry.
  7. Fish

    Fish LawnSite Member
    Messages: 139

    Shelf life? Does it have a born on date? Ever wonder why oil has
    tamper proof seals and ketchup does not?
  8. fivestarlawnken

    fivestarlawnken LawnSite Senior Member
    Messages: 438

    If this machine makes you money don't fret about a few dollars and oil.Five bucks on oil is cheaper than an engine!!;)
  9. point

    point LawnSite Member
    from mn
    Messages: 23

    It is best to change oil before storage it gets the acids out that could be
    attacking the metals thruout the storage interval.

    There is really no reason to change oil after the storage interval unless
    you need a viscosity change. the only thing that can happen to oil during
    the storage is condensation could add a small amount of water to the oil
    I say small amount because this amount will do no harm at all.
    as soon as the oil comes up to temp. the water will boil off, oddly enough
    1 startup when cold say 5 to 15 F will produce more water in the oil than sitting
    all winter.

    Dochere, oil degrades VERY slowly under 100 degrees something like 70 years
    oil stored at room temp would show no detectable change after 10 years.

    Very nice site by the way I learn a lot
  10. awm

    awm LawnSite Gold Member
    Messages: 3,354

    old burnt oil developes corrosiveness ive heard. so id change before storage. then at regular intervals after you put it back into service

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