engine additives

[boaterntexas]

I have a 1990 mercruiser 3.0, and cuaght my self looking at all the diffrent engine treatment, and performance boosting additives. So now I want to put some in my motor.. The oil additives, like outlaw, and cd2 really got my attention<br /><br /> so what do you think, it there a need for additives. <br /> If not a need is it helpful, if so any one have and suggestion for this motor.. I'm looking for both performance boost, fuel economy, and engine life.. <br /><br /> Thanks,<br /> Thomas

 

[Ralph 123]

Re: engine additives

This may be neither here nor there, but I keep reading all my engine manuals which say not to add any additives to the oil - all my GMs, even my riding mower says not to....<br /><br />On the other hand look at a product like Marvel's mystery oil - the stuff has been around since the 20s....<br /><br />I figure, as long as I use a high quality oil, check it and change it often there is no need for additives.<br /><br />I do use fuel stabilizer when the fuel isn't going to be burned up right away and every now and then I also use octane boost.<br /><br />Just my 2 cents...

 

[Trent]

Re: engine additives

Dont waist your money!<br /><br /> Look Here

 

[boaterntexas]

Re: engine additives

RALPH,<br /> When using the octane boost, what kind of results did you see? Did you experince and rpm increase or anything like that.<br /><br /> Thanks for the link.. very informative..

 

[Bondo]

Re: engine additives

Snake Oil.....<br />Designed to relieve you of your Money... Not to make Anything Run Better....<br /><br />FYI, Increasing Octane Lowers the Flash-point of gas..... Not Increasing Power....

 

[magster65]

Re: engine additives

Bondo's right, octane boost allows you to run a higher compression, not something you can easily adjust. In some cases you can run a little more ignition advance which may give you more power but it does nothing if you don't need it.

 

[Ralph 123]

Re: engine additives

I actually had to use the boost to compensate for old fuel with the old engines. They were a tired old pair and the boost made her run better. I haven't used it since I replaced the engines. I have been running premium (91 octane). Now, given that these babies are brand new can I step down to 87 or 89? The 350s are of the 79 design parameters - I think they have the lower compression ratio so I think I can get away with 87 or 89. Any thoughts?

 

[Juancho]

Re: engine additives

I completely agree with Bondo. Additives are nothing but snake oil. Marvel Mystery oil is the only thing I ever use, and only in certain situations. Like when I summerize my boat. Before first starting up sleeping beauty, I shoot some Marvels down each cylinder with a turkey baster.<br /><br /> The truth of the matter is, additives, especially oil additives were once very useful, because most manufactures did not put them in their oil. Those days are long gone however. Now a days there isn’t a single oil manufacturer, or gas manufacturer for that matter that doesn’t use additives.<br /><br /> As for octane boost, that is only good if you are running a high compression motor. If I were to own say a mint condition ’67 Pontiac GTO, with the original engine, which was built for 91 octane regular gas, then I would definitely use either Super or octane boost.

 

[boaterntexas]

Re: engine additives

WHEN you find that mint '67 gto with the og engine let em know, would pay good money for a muscle like that