LT71141 looks like engine oil and smells like cat's pee. DEX has neither characteristic. It is dark red in colour.
Whilst you're there, smell the oil for a burning, toasty aroma and look at it critically, it should still be quite a nice amber colour.
NO burning aroma. SMells a bit like cat's pee. I'd say it never was just red, BUt I can't be sure what mix it is.The whole body of 3 litres in the tray looks dirty. Against the light, you might say amberish, If you really want to see amber... and try hard.
DEX is a LOT thinner and weaker than LT. LT has a lot of body and stickiness about it.
Difficult for me, I've never seen the consistency of DEX.
Yeah , I'd say this is thin anyway, compared to engine oil. The new stuff from Citroen, seems thin also: I wouldn't say that new lot (ESSO: HP20/AL4, with the Citroen badge all over, and checked against old LT specs) has a lot of body, or is sticky really either, but slippery. It is amber.
I would say castor oil is sticky and has body (is more viscous than others).
I don't know these synthetics well, or the old spec AL4 oil, so I can't draw a distinction there either. It's thinner than engine oil, even new.
Anyway, I've emptied 3 litres. I'll be filling up and test driving it on a long run, after the weekend, and fitting a new drive belt tensioner roller. Cross fingers.