HEADS UP!!!

Site upgrade in progress... Core site functions are working, but some non-critical features/functions will be temporarily unavailable while we work to restore them over the next couple of weeks.

Please post any bugs you encounter, but before you do, check to see if it's already listed.

Thanks for your patience while we work to improve the community.

Sign in to follow this  
Followers 0
CaptainKnobby

Why put maxima 927 oil in a 4stroke gas tank?

43 posts in this topic

from what i have heard, it helps the valves, and the piston/cylinder because it provides just a little more lubrication. plus it smells nice :applause: haha

Share this post


Link to post
Share on other sites

Not sure about that product, but I run Marvel Mystery Oil.

Lubricates the top end and carb, helps fight breakdown of fuel, and the fuel doesn't stink as much...

Share this post


Link to post
Share on other sites
What is the purpose of a teaspoon of maxima 927 oil in a full tank of gas in a 450 fourstroke. Does it help the valves or something else?

I have never heard of anyone doing that. I am going to try it now though.

Share this post


Link to post
Share on other sites

Would this richen the fuel enough to justify rejetting or just turning the fuel screw leaner a bit?

Share this post


Link to post
Share on other sites

you boys need to do some searching for a post from Tryce (ffrracing) about using MMO and how it helped with his dirttrack yzf motors. the boy has been roundy-round enough to listen to. if you understand, all the better. :applause::eek:

Share this post


Link to post
Share on other sites

A teaspoon added to a tank of gas is just for the smell. Any castor-based pre-mix oil should work.

Share this post


Link to post
Share on other sites

I am not sure that I agree with all this........unless you plan to let your bike sit for a while. :applause:

Share this post


Link to post
Share on other sites

This arose out of the thread:

http://www.thumpertalk.com/forum/showthread.php?t=485338

(also posted above this) in which it was asked if there was an oil for 4-strokes that smelled like castor, and there is; oddly enough, it's castor. But it's impossibly expensive to buy as a four-stroke lube oil in any form I'm aware of, so if you really have to have that smell, adding it to the gas as a "top oil" is the only other choice.

The use of top oils are a very old school practice, but still has some merit. Modern valve seals and oil rings are so effective that they exclude virtually all oil from the upper cylinder, and the compression rings, valve faces, and valve stems in your bike are lubricated almost entirely by gasoline. The aforementioned gentleman some of us know as T-Dub would point out that some racing fuels tend to be a little bit too "dry", which is to say that in his opinion, they don't have enough lubricating properties to make him comfortable. Adding oil to the fuel at a rate of 10-15cc/gal (around 300:1), or more, is one way to restore that lubrication.

As a top oil, Marvel Mystery Oil is probably a better choice than a two cycle castor, because it has cleaning properties the castor doesn't, and is somewhat cleaner burning than castor in any case. If you just like the smell, there's no harm in doing this as long as you don't put so much in the fuel that it starts smoking and fouling plugs. Back in the day, we ran Castrol R in all our big British bikes, and you could always smell it in the exhaust just from the small amount of oil that got past the rings and valves, so it takes very little for your nose to pick it up. 5cc a gallon (one teaspoon) should be enough. That's about 750:1, BTW.

Share this post


Link to post
Share on other sites

I guess i'll get some maxima 927 and put one teaspoon to 5gal of gas. I dont think that will be to much to foul a plug or make it run to rich "do you".

Share this post


Link to post
Share on other sites
I guess i'll get some maxima 927 and put one teaspoon to 5gal of gas. I dont think that will be to much to foul a plug or make it run to rich "do you".

not at all. i run 50 50 race and pump gas in my bikes and i mix my gas with the maxima at 100/ 1 ratio. my bikes run great, no fouling plugs and it does not run rich.

Share this post


Link to post
Share on other sites
I dont think that will be to much to foul a plug or make it run to rich "do you".
Adding oil to gas makes it run leaner not richer, although the amounts that you are talking would have no noticeable effect on your bike

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!


Register a new account

Sign in

Already have an account? Sign in here.


Sign In Now
Sign in to follow this  
Followers 0