Quote:
Originally Posted by jdraupp
Then long term effects of acidic oil wearing on my original ims bearing which is sitting in it all winter are why I find it necessary to change my oil before and after storage. This is best practice.
If it was Joe Gibbs oil that was costing me a fortune I might rethink my procedure. But since I get my Castrol edge fairly inexpensively it's a no brainer to change it because I like my car and I like the peace of mind. Oh and also the consensus from experienced porsche mechanics is that you should change your oil before storage.
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If 1500 miles will create acidic oil then why do we not drain this caustic poison from our engines all together? And this is not 1500 miles on jiffy mart 99cent oil, this is full synthetic oil which once upon a time many manufacturers specified a 15,000 mile service interval. We don't drain it though, we run it and coat the insiders of our engines with it so that it can protect the metal from friction and RUST.
Sitting engines lock up because the pistons seize to the cylinder walls and water from condensation from temperature changes causes rust in the bearings, valve train, chains etc. To properly store an engine you mist the cylinders with oil to prevent this, no one has mentioned this practice in this thread but hey, what do I know.
Once again, starting or simply turning the engine over to circulate oil will do far more to protect your engine than anything else. I would not throw out 1500 mile oil if I were the OP.
You guys can do whatever you like, they are your cars and I don't fault people for erring on the side of caution but I think it can get silly when you throw perfectly good oil away twice a year without testing it. If the data says its old then it's old, otherwise it is a waste of money.