oil additives

oil additives

Ok here is the deal on my old 95 GTS Celli I added Marvin's Mystery Oil to calm her down and make her purr
and she had about 130k

on my 97 GS? nothing seems to work? well Lucas Oil stabilizer seems to work ok....any recommendations?
the car has run on non synthetic oils so can't switch to mobal one.
any help would be nice
thanks
SXFX

Just switch to synthetic. It doesn’t matter if you haven’t run it before.

So who here uses synthetic? How does it treat your DSM? I currently have a ford taurus GL, no DSM... but BUT I will be getting 1G AWD Turbo this summer (hopefuly, got my fingers crossed). The taurus is almost 210k, it still runs quiet, still pulls and has nice milage, despite the milage. I can't wait to get a DSM I wana keep her close to my heart... so how's synthetic oil on them ;) anyone use em? How long did you manage?

I was told that you should break in the car with normal oil, then switch to the synth stuff. but if you have lots and lots of miles on your car then you shouldn't switch for it would cause the seals to open up.
that is what i was told
shah

well it can wash the crud out that could be sealing a leak, but a leak is a leak and shouldn't be there crud or not. Plus syn is better for your engine. The breaking in thing is true too.