At the current prices, I wouldn't throw anything out.........use it! Chit, I'm old enough (72) to remember gas stations selling "re-cycled oil. Came in 1 quart glass bottles with a pour spout on top.......
That oil is just fine, no need to test. Synthetic oil has just been synthesized during refining, it's still made from a base of crude oil that is billions of years old.
At the current prices, I wouldn't throw anything out.........use it! Chit, I'm old enough (72) to remember gas stations selling "re-cycled oil. Came in 1 quart glass bottles with a pour spout on top.......
I remember that, I had some oil burners that it would be a sin to put new oil in. I remember a 283 Impala that would begin to knock from low oil, we could only scrape up a couple dollars between us, hmm, gas or oil? Ah, gas, I'll get oil tomorrow.
Some folks think this is odd but, I always shake up my bottles of oil before opening. My thinking is to mix it back up in case some of the additives may have settled out of the mix.
East Anglia, eh? Docked there in Ipswich after crossing the North Sea from Rotterdam 50 years ago when I was 23. Worst boat ride of my life. Rented a right hand drive car with stick shift Made it about 3 blocks before turning around and trading it in for a left hander.