Annual Change?

[bigdawg74]

Originally Posted By: NCGuy68

Seems like a heck of a waste to dump clean oil for no good reason.


While the oil may still be "clean", it is not going to have the same chemical make up of oil that is new.

Case in point: I could go buy four brand new tires today, and let them sit out in the Arizona sun for 9 or 10 years. At that point, I could try to sell them to you as "new" tires with 100% tread left on them. Would you use them? I sure wouldn't.

 

[Spector]

Why not just try it for two years and get a UOA and also see what shows up on dipstick as well as at the drain. You will not do any damage over two years worth talking about, IMO none, but it won't make a hill of beans difference in the longevity of the vehicle.

Try it, IMO not really a down side to trying it. I have gone 20 months but did put on about 2500 miles in that time but I saw not changes in anything. Oil looked great when drained

 

[sbergman27]

Originally Posted By: XS650
It's because they don't have a valid reason. The same logic could be used to say change it every 6 months, or every month.

Look. You should just do it because it's Cheap Insurance.

 

[sbergman27]

Originally Posted By: bigdawg74

Case in point: I could go buy four brand new tires today, and let them sit out in the Arizona sun for 9 or 10 years. At that point, I could try to sell them to you as "new" tires with 100% tread left on them. Would you use them? I sure wouldn't.

I suspect that they'd be perfectly fine. UV is not going penetrate beyond the surface layer. Scrub 'em up with a little scotch-brite and they should be good as new, albeit decade old tire technology.

 

[Tom NJ]

Originally Posted By: sbergman27
Look. You should just do it because it's Cheap Insurance.


Great link!

Tom NJ

 

[BobFout]

Originally Posted By: Tom NJ
Originally Posted By: sbergman27
Look. You should just do it because it's Cheap Insurance.


Great link!

Tom NJ


Hahah! That's a great link.

 

[HTSS_TR]

Originally Posted By: sbergman27
Look. You should just do it because it's Cheap Insurance.


Great Humor !

 

[fdcg27]

Don't bet on that.
I have mounted almost new tires that had sat in the garage for about ten years.
Let's just say that it didn't take very many miles (like 5K) for a Michelin XZX (I said it was old!) to develop serious structural damage.

 

[J. A. Rizzo]

Originally Posted By: NCGuy68
Originally Posted By: J. A. Rizzo
Oxidation of the oil is different from oxidation of the internal engine components. When iron or steel oxidizes, it rusts, as you stated. But when oil oxidizes, it might lose some of its protective properties, or the additives could degrade. I don't know. Just pointing out that oxidation of the oil is not the same as rusting.


So how does one determine that his oil has oxidation and if so, how has that degraded the oil?


That's a good question. I don't think anybody knows for sure without doing an oil analysis. The one year thing is probably just speculation. We haven't seen any science behind it in this thread so far. Maybe it is safe to go longer than that with very low mileage. You won't know until you get the used oil tested.

 

[Bamaro]

It all depends on your driving habits. If you never take short trips where the oil doesn't reach full operating temp for a few minutes, you can let it go a couple of years with low total mileage.

 

[Malo83]

Originally Posted By: Bamaro
It all depends on your driving habits. If you never take short trips where the oil doesn't reach full operating temp for a few minutes, you can let it go a couple of years with low total mileage.

Surely you Jest

 

[Bamaro]

Originally Posted By: Malo83
Originally Posted By: Bamaro
It all depends on your driving habits. If you never take short trips where the oil doesn't reach full operating temp for a few minutes, you can let it go a couple of years with low total mileage.

Surely you Jest

Nope, do it all the time and have the Blackstone report showing it works.

 

[sbergman27]

Question. How come we don't apply all this advice about condensation to automatic transmissions? It is, after all, oil sitting in a sump. My Toyota's maintenance schedule details required maintenance out to 120,000 miles... and never mentions changing the factory fill. No mention of severe vs normal service. No mention of the dangers of condensation. Mine is not one of the completely sealed units. It has a dipstick. And periodically, I'm supposed to check the level and top off with "WS" fluid if necessary.

 

[Garak]

Originally Posted By: Bamaro
Nope, do it all the time and have the Blackstone report showing it works.


Exactly. It's the guys who have a show car in storage and start it up for 5 minutes every month that have the problems, not the guy that takes it for a highway trip once every few months.

If one is worried about the battery, use a maintainer, don't start the thing. If one is worried about condensation, take it for a rip; don't idle it for five minutes.