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Does anyone have any input on oil type & mix ratios for small bore engines from the '60's? Regular two stroke oil has advanced to the point of accepting 40:1 as a reasonable premix for machines that in their day were requiring 20:1. In addition to my 3 RX powered cars, I have a '75 Suzuki RE5 (single rotor 500, uses engine oil from on board tank), a Sachs Dolmar chainsaw (only rotary powered saw ever produced) and a '69 SnoFury (single rotor Sachs) snowmobile. The saw & snomachine call for 40:1 engine oil (30 wt) back when they were new. Any comments on oil products in use 40 years later?
Thanks,
Seann
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Rotary engines in snowmobiles & chainsaws
Oil type & mix
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- F.N.G.
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- Group: Members
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- Joined: 12-January 09
- Your Car:Suzuki GS500
Posted 06 February 2010 - 12:05 PM
100:1 should be enough, it largely depends on RPMs and load. Regular 2-stroke premix oil, but you should try fully synthetic 2-stroke oil. Some people are using "castor" oil, again around 100:1 premix.
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