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?
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.
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
You can buy the Stihl oil by the 5 litres which makes it more
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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