2 stroke oil
Road Warrior
Joined: Feb 2018
Posts: 1,497
Likes: 1,160
From: Long Island
My two-stroke PX Vespa has a catalytic converter, so the two-stroke oil is not doing harm 13+ years of running. I use the expensive Swiss synthetic oil, a bottle lasts me a long time.
I think w/a 2-stroke engine adding too much oil can have the effect of leaning out the mixture by displacing some of the fuel in the mix. The result can be a seizure, even though more oil has been added. Kind of the opposite outcome people were hoping for by adding extra oil.
I have been adding 1 1/2 oz marvel mystery oil per 5 gal gas in my '78 Bonny, many years of healthy running, ran it in my fuel injected 02 Duke too. Always clean reliable running.
That's my big story..
I think w/a 2-stroke engine adding too much oil can have the effect of leaning out the mixture by displacing some of the fuel in the mix. The result can be a seizure, even though more oil has been added. Kind of the opposite outcome people were hoping for by adding extra oil.
I have been adding 1 1/2 oz marvel mystery oil per 5 gal gas in my '78 Bonny, many years of healthy running, ran it in my fuel injected 02 Duke too. Always clean reliable running.
That's my big story..
Ultimate HDF Member
Joined: Nov 2016
Posts: 6,697
Likes: 774
From: Stuart, Fl
Maybe back in the day it was worth doing that helps old carbs bikes use to use marvel mystery oil. But in todays vechicles theres no need with fuel injection just clean that system at lease once a year and your good.
Seasoned HDF Member
Joined: Mar 2010
Posts: 38,614
Likes: 6,439
From: Honah Lee
I see the tin man sure got you with a dose of their coolaid.
Tourer
Joined: Dec 2006
Posts: 279
Likes: 11
From:
Are you sure they were not talking about 2 stroke with diesel fuel. I ran that in my power stroke, quiets down the injectors.
Last edited by ChickinOnaChain; Oct 6, 2018 at 08:18 AM. Reason: Multiple posts
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Tourer
Joined: Apr 2017
Posts: 465
Likes: 122
From: Texas
Not injected here, but I understand your pain
Stellar HDF Member
Joined: Mar 2017
Posts: 2,597
Likes: 2,172
From: australia
back in the days of super fuel your exhaust mufflers would burn out....these days with unleaded they dont seem to burn out much at all...so folks would add some 2 stroke oil to the fuel so the mufflers woudnt burn out. Over time 2 stroke oil has developed heaps and the biggest drawback adding 2 stroke oil to your fuel is that the oil will "varnish up" if your bike is not ridden leading to blockages. So dont add 2 stroke to your fuel, unless it fires every stroke !!!