Hi, I am running renault talisman 2016.
Can I mix leak stoper rt 205 and engine coating same time into my engine oil?
I know coating additives are usually added in to oil recently, so Rt 205 should know that and design their products some how to avoid bad things right?
You would have to ask the manufacturers of those products. What are you trying to accomplish? By "rt 205" do you mean ATP AT-205 "Re-seal"? That might work for a while for slight leak in engine main seals. But what is this "engine coating" you want to add? It's pretty much a guarantee that the stuff is just snake-oil that will do little but empty your wallet and if lucky might not damage your engine.
They are:
AT 205 Re-seal STOP LEAK.
BESTLINE UNIVERSAL ENGINE TREATMENT XLR 100
The AT-205 might help depending on the situation, which you have not described at all.
The other stuff is absolute crap. There is no oil additive that fixes engine wear, extends the life of your engine, or (to quote the ludicrous claims on their web site) "murders mediocrity and resurrects raw power", or can "Give your ride the afterlife it deserves". It's nonsense.
Thank you
They are:
AT 205 Re-seal STOP LEAK.
BESTLINE UNIVERSAL ENGINE TREATMENT XLR 100