wrote in message
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I now have 3 tools with 2-stroke engines: a mini-tiller, a weedeater,
and a leafblower. They all require different gas-oil ratios. One is
50:1, one is 40:1, one is 30:1 !

Can I mix 40:1 and use it for all 3? yes

Will it ruin anything? No.

Steve