Stihl 2 stroke enquiry

In my strimmer manual it says if the 2 stroke oil is any type other than Stihl's, the mix must be twice as strong ie 25/1 instead of 50/1.
As I use decent 2 stroke brands, such as Shell/Castrol is this statement by Stihl accurate?
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Stil use 2 stroke oil that conforms to JASO FC, so if you check the spec on your 2 stroke oil's label and it conforms to JASO FC, there is no reason why you can't use 50/1.
Using cheap 2 stroke oil at 25/1 will foul the plug and clog the exhaust eventually, costing you more in the long run.
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Castrol Scooting 2T I see has that approval; thanks.
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Gel wrote:

The chap who looks after my petrol gardening gear says that there need to be a little more oil than recommended, it prolongs active life.
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Gel wrote:

I have never bothered to find out. I suspect that there are other oils equally as good as Stihls, but why take the risk?
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The Stihl oil is very clean we use it mostly and always at their recommended dilution. I have seen only one other oil which claimed to be its equal as regards dilution rtaes but its name escapes me. Other wise its 25:1.
You can buy the Stihl oil by the 5 litres which makes it more economical.
--
Paul Mc Cann

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says...

Stihl, Husqvarna, McCulloch, Jonsered, all recommend that you use their own name 2 stroke oils at a lower dilution rate than if you are using other brands. The reason is some oils don't meet the requirements for high revving engines when mixed at 50:1.
Most (but not all) modern synthetic and semi synthetic 2 stroke oils, far exceed the spec's of Stihl oil at 50:1 and are capable of being used in high performance racing engines.
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