2 stroke oil in 4 stroke gas?

Happy Valley

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I had seen a post here but darn if I can find it after searching for an hour.
Someone was recommending running a small amount (?) of 2 stroke oil in the gas for for small 4 stroke engines for extra lubricating.

How's that work?
 
yes very little I have also used a little marvle mystery oil in the gas to help free those sticking valves:D
 
It'll work but go really light. 400:1 or so.

I think if I recall correctly it was being suggested in a thread on the effects enthanol in gas had on lubricity.

400:1?

That'd be something like 1/3oz@gal.

Hmmm, wonder if it's even worthwhile?

Maybe during run-in?
 
as a basic rule - the more lubrication is always the better up to the point where you get unburnt oil and such in the motor..

I think the best advice is to try it and see what happens.. you can get small 77ml bottles of two stroke oil I think.. if you can get hold of a couple of those then you have a supply and you can test it.. if it helps then keep doing it, if it doesnt then it hasnt cost you much

Jemma xx
 
I only have one fuel for my small engines. Its 2 stroke fuel and I run it in my 4 stroke lawnmowers, snowthrower (no longer, left that in Colorado), and dump it into my rx7 when it get old and stale.
 
I throw fuel stabilizer, along with MMO or two stroke oil at 128:1 in my jerry cans. I figure the little extra lubrication will not hurt anything, and will help as a valve lubricant and top cylinder lube. I was told to do this for break-in on small engines, and have adopted it for all my 4 stroke power equipment. (motorcycles included) Two strokes get 32:1 mix of high quality synthetic, regardless of what the manual says. I was sick of having 32:1 for my tiller, 40:1 for my leaf blower and 50:1 for the trimmer.
 
I have used 2 stroke mix gas in my lawn mowers if I forget to buy gas before heading out to mow for the day.....No excessive smoke or anything so far as I could tell...

Andrew
 
yeah, as been said a little will be ok, a lot of cars running on LPG use a upper cylinder lube feed into (usually) one of the smaller vacuum pipes on the inlet manifold for longer valve stem life and slower valve seat recession.

4 strokes have an oil control ring or scraper ring to prevent windage and crank case compression pushing oil past the compression ring(s) resulting in oil consumption.

If you add to much oil to combustion it will start to "gum up" the ring lands and eventually will make the oil control ring stick which will lead to oil consumption, so yeah a little and probably a synthetic that doesn't leave much deposit may give you longer valve stem life.
 
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