Opinions on 'Old' New Engine Oil

['93 RT/10]

Here is some information on storing oil from the Amsoil website.

https://blog.amsoil.com/what-is-the-...ic-lubricants/

[Brian E]

FWIW, I keep a significant inventory of motor oil for all the cars, tractor, etc. Like others I like to save a buck and when it's on sale or even better clearance, I stock up. I just write the date of purchase on the bottom of the jugs and segregate it accordingly on shelves in my basement. Once upon a time I had a Corvette and I mistakenly grabbed oil from the wrong shelf and used 7-8 year old quarts of Mobil 1, 10W-30 oil for an oil change. After a season of driving I sent a sample off to Blackstone for analysis. The analysis came back PERFECT. It even said I could have gone much longer before changing that oil. With that said, I still have close to 30 quarts left of the Pennzoil Ultra Platinum 0W-40 SRT, Viper oil downstairs from 2014/2015. I just can't bring myself to use it for anything other than the lawn equipment.

[Hamrhead]

OK Thanks Guys.

I guess the JD Zero-Turn will start getting synthetic for the next 5 oil changes or so.

As mentioned above, just not worth it for $100 for new oil.

The dealer just changed my oil two weeks ago, which turned out to be a $200+ oil change, so that's what got me thinking I should just do it myself next time being as it's a pretty simple job. We'll see..

[AZTVR]

How many of the folks above have technical knowledge and experience with petrochemical stability? Preferably someone that works in a related industry. That is the person who I would take the advice of instead of the manufacturer's advice that was posted. Too bad that Tom doesn't post much any more.

What happens to the multiviscosity characteristics as the oil is held for years at temperatures above the recommended storage temperature? Is 6 years of constant daytime summer attic temperatures similar to only 1000 miles engine operating temperature? Or is it equivalent to 20,000 miles? What is the technical answer to that? What about the other chemical additives?

[GTS Dean]

Exxon/Mobil is in the business of making and selling petroleum products. They want you to buy more, even if it isn't needed.

That said - the alphabet soup of 2-letter codes have some specific formulations based on manufacturer performance requirements scattered over many years of production. Some older lubes may not meet all of the newer engine manufacturers' published minimums.

[Bill Pemberton]

Quality info from TKO Motorsports, cool stuff from Doug Shelby Engineering, these two great sponsors are so beneficial to our Vipers ---- even if the subject is as simple as replacing a battery. Lots of valuable info and choices, and as always thoughtful insight from Steve Indy1