Freshly honed RQD block '101764' ready to get the "good oil" Since this pic was taken '101764' is back in ST2 Z63 Road No.F46, covered some 800km's and is now barking like a Coyote.
As an operator and rebuilder of motor car engines for some time now and also being a member of the US "speeders list" the majority view of the worlds motor car operators including myself is to use a good TCW2 or even better TCW3 2 stroke oil. In Australia 'Castrol 2t' or equivalent. Our North American speeder friends on the speeders list do thousands of miles a year in their motor cars using modern 2 stoke oil at a leaner mix and thats proof enough for me.
If you are the sentimental type ( I have been brought to task for calling you Dinasours) and want to use the original oil/mix then by all means go ahead. There are a couple of things to be aware of though. Firstly you need to locate an oil that does not have detergent or any other additives in it and the specs say it can be used as 2 stroke lubricant.
I don't believe this oil is available any longer in Australia but if you know otherwise please let me know and I will be happy to post the brand/ your name and the mix ratios you use here so people can make a more informed choice. As Australia has a far warmer climate than North America I would be tending towards using the 40 grade oil if you want to risk using straight engine oil, thats if you can get the correct type, as the operating temps may be higher in the engine especially in our northern states.
It is beyond my scope to say if the detergent additive and other chemicals found in modern SAE 30 or 40 grade oil will affect the wear of your engine...bit risky if you ask me as the SAE 30 or 40 grade oil these days is spec made for 4 stroke sumps and not for dilution in 2 stroke engines.
I have been using a 19:1 ratio with modern 2 stroke oil for twelve years now without trouble..I am never plagued with starting problems, over heating etc or constant changing of plugs. The mix I recommend may be a little on the rich side using modern 2 stoke oils but with bronze piston pin bushes and white metal big ends it wont go astray. It is also easy to mix with a 20 ltr. jerry..19 of unleaded or lead replacement is Ok and 1 ltr. of two stoke oil.
The choice of oil and mix ratio's is of course up to you my friends. The above is what I think is best based on my extensive experience.
I note Queensland Railways in their 'Instructions For The Use of Tools And Equipment No.5' document advises that the ratio is 16:1 for Fairmont and Sylvester Motor Cars. I also note it doesn't state what type of oil to use.
Your feedback is most welcome
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Updated 9th Dec 2003