Originally Posted by
speedracerntrixie
I personally think that as long as you are using a good quality oil formulated for air cooled engines and your mixture is set correct then you should not have any issues. The reason why some of us are using a wide variety of different brands of oil and having good success is simply because we are using enough oil in our mix. There is no magic oil. Matt makes a great point that carbon build up is usually just running too rich.
I have to disagree with this to a point....Oils are different...Petro vs Synthetic vs castor. They do different things and all have their strong points...Examples:
Petro= I'll use it to break in new or rebuilt engines at a lower 20:1 Ratio to properly allow enough lubrication yet enough friction to properly seat the compression ring.
Synthetic= I like synthetic for normal use for longevity as its proven to be a lesser friction additive. They also burn very clean.
Castor= Known to help pull heat out of the cylinder and lower the EGT's. but often are dirtier and gum up exhaust side...They are often frowned upon for engines such as Rotax because of the power valve gets gummed up or on Hondas that use HPP's on the exhaust side. I know we are talking about simple air cooled low compression engines that do not use power ports on the exhaust but I know the difference in what the different oils do to these items with my many years of personal experience. I used Maxima Castor 927 for a year with my Moto's and had to stop using Castor based...It was hell keeping the power ports clean and I had to service them almost every two rides to keep the Engine running properly. Switched to a 100% synthetic and never had to service them even during a tear down to ring an engine I could ignore it completely it was so clean. By the way .... I have always jetted these bikes to run their best as I was racing them. They were not gumming up with the Castor due to rich conditions.
The Statement "There is no Magic oil" is true yet false... There is a difference in the oils we choose to use...Some are better than others and one type is better for a particular use than another for that same use.
AR9100 by Archoil is a great example that there are "Magic Oils". I used every type of synthetic Engine oil's etc...along with Every additive with no luck in getting rid of my extreme Injector stiction issue on my Powerstroke Deisel. Added 9 Oz's of this "Magic oil" and POOF! The engine instantly "Litterally" ran like 100% new. The truck when cold would only run on 5-6 cylindrs and not run up until it came to normal running temperature...Some times it wouldn't even start at all...Added the AR9100 and Starts right up and purrs like new no matter what temp. That's my story on "Magic Oils" Sorry if I got a bit off topic guys...Just wanted to give an example