Sign in to follow this  
Followers 0
i_wheelie_longer

Mixing Two-Stroke Premix 100:1 Into Gas???

5 posts in this topic

Anyone add a tiny bit of two stroke synthetic premix oil into their gas for their 4 strokes? A couple people I know add premix 100:1. Is there any negative effects of this? Or is it more beneficial with a little extra lubrication for the piston, cylinder, valves, and valve seats? The bikes don't smoke or anything, and be mindful I'm not saying to mix oil like you would on a two smoker.... just approximately 100:1. Any thoughts?

Share this post


Link to post
Share on other sites

I wouldnt because there is a reason it takes straight gasoline. ANd second, you may get deposits on your valves, etc....

Share this post


Link to post
Share on other sites

This tactic is an old one, dating to before the second world war. It's called "top oil". It has some benefit when using a "dry" fuel, such as some racing fuels or alcohol, since the compression rings are lubricated only by fuel in a well built engine.

But it's not as important as it once was, and isn't required at all with most pump fuels unless you run E85 (shame on you). 100:1 is too much, anyway. 200:1 is more like it.

Share this post


Link to post
Share on other sites

The oil mixture in the fuel actually reduces the octane rating a smidge too, I have used premix in my 4 stroke in a pinch with no noticable effects, but I see no reason to intentionally do it. Oil fuel mix has a shorter shelf life too, burn it all up if you use it, don't let it sit for weeks in the tank.

Share this post


Link to post
Share on other sites

I run redline fuel system cleaner in my gas. It lubricates, cleans and helps prevent knock. Been using it for about 13 yrs works great.

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