Is Stihl HP a semi synthetic oil.

Karolh

Active Member
I was of the impression that Stihl HP oil is a semi synthetic blend but would appreciate if someone can confirm that it is, or is not. Thanks.
 

Karolh

Active Member
Stihl says on their web page that it is fully synthetic. Doesn't say what API group.
I posed the question to Stihl recently and got an e-mail reply from a member of their tech group, who advised me that their HP branded oil is a excellent quality mineral oil and not a semi synthetic as I had previously thought.

Their HP Ultra is a synthetic oil.
 
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