Originally Posted By: zeezee
Originally Posted By: RedCorvette
Do any oil bottles say "shake before use"?
It doesn't make sense to say in the same email that additives settle but then still say the shelf life is a year. If it were a case of just shaking, then the shelf life is longer.
Or maybe they are pushing usage and repurchase?
Why would they say to shake it? Only lunatics like us would buy enough oil to last more than a year.
That said, if the additives settle, the only concern is getting it off of the bottom of the bottle.
I have to agree. I have plenty of 1-2 year old oil bottles in the garage. I find that some are extremely hard to mix after the additives have settled on the bottle.
I'd shake and shake before opening, pour 1/3rd of the bottle and find the bottom of the bottle still littered with stuck additives, which are a dark color (kinda looks like dirt on the bottom).
I'd have to shake it for quite some time to completely get all the stuff suspended.
I don't know how important it is to shake the oil bottles, esp if the additives have settled but i'd expect after all this time that someone should know.
Couldn't we send in a sample for analysis straight from the top of a bottle that sat for a while, and then shake it up really well and send in a second sample?
I'd expect the first sample should show LESS additives vs the second which was shaken and has all the proper amount of additives suspended in the oil...???
