For those of you that store your car over the winter, do you drain the oil and put fresh in and then change it again come spring? I was told once that oil turns acidic through time and that it wasn't a good idea to let it sit for more than three months. Is this true?
Thank you,
Fao, Sean opined in news:1eqdnSAjvfy28y snipped-for-privacy@adelphia.com:
Purely speaking theoretically, not being a chemical engineer - though I did once stay at a Holiday Inn Express- ,it's combustion byproducts plus water that creates the acidity.. as in H2SO4.
In storage, it seems to me, you're only going to get condensation. Water and oil dont bond but oil and acids interact
So if I put a car away, I would change the oil just before storage.
Then after taking it out, just drive it for a couple hours...
:)
Erg, brings back painful memories of chemistry. Funny how I did so well in Physics yet absolutely struggled through chem.
At any rate, condensation is more than enough incentive to do an oil change before winter storage :-).
Thank you much for the advice,
Am I missing something here? What is the concern? Corrosion of?? After the initial cooling off of the engine what condensation will occur? What combustion byproduct is in the oil to result in the formation of sulfuric acid? Hell, I would be more concerned about mould growing in the interior than engine corrosion by leaving in used oil. Aren't we all changing oil in
3k mile intervals. Not exactly old oil.
I actually change the oil more than everything 3k miles so the oil definitely *shouldn't* be dirty yet. Somewhere, I thought I had read once that you should change your oil every 3k miles or every 3 months, whichever comes first. It's quite possible that I'm just making the second part up :-).
I change my oil & filter before winter storage and when I bring her out.
Is it necessary? Beats the hell out of me but for the amount of money it cost to be safe...who cares? :-)
Jeff
01 GT FIPKJeff opined in news: snipped-for-privacy@hotmail.com:
Well, you're not gaining anything by changing it after storage... there will be a little water from breathing condensation, if it's in unheated garage...
BUT draining the oil wont get that out, it has to be evaporated out.
And like I said, the oil doesnt get acidic if the engines not runnning
Once a long time ago I had an Alpha Romeo, which doesn't really mean anything. But it did come with a very in depth owners manual which went into some detail on how to store the car. They suggested draining the oil, removing the spark plugs and squirting oil into the tops of the cylinders, then cycling the engine a few times before replacing the plugs and putting the car under wraps.
That sounds like long term [year(s)] storage advice.
Unless you have rapid temperature changes, you won't have any condensation in your engine. Just don't start and run the engine for short times and you're fine.
I would do an oil change shortly before park>Jeff opined in news: snipped-for-privacy@hotmail.com:
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