I bought a brand new engine that had stood in a crate for 5 years, never fitted or ran. I replaced the factory oil and filter before running it. Turned it over on the starter with the plugs out until oil pressure registered, refitted plugs and it started immediately with no rattle.

10 years later it still starts on the button and other than an annual change of factory spec oil and filter needs no maintenance. It stands from late October to early April every year and when I start it there is no rattle, oil pressure is there instantly.

Never used additives and never will. If they were needed the manufacturers would make them a condition of the warranty and sell them at highly inflated prices. Instead most say not to use additives since modern oil and petrol contains all the engine needs.

IMO best to stick to normall OEM oil filter change, engine should still start after weeks of standing without additives....

Just my opinion!

Your probably right

But then again that is just your opinion, mine happens to differ.

Opinions have always differed on whether additives work or not, and I doubt it will change, as long as there are differences of opinion there is something to discus, all I will add is I would not waste money on them,and as has been said if OEMs wanted you to use additives they would advise use of them, none do that I am aware of.....

I find those that buy these additives will always defend the additive regardless of whether they work or not, after all who wants to admitt they made a mistake....or not?