What about a 5w-30 Group III Syn Blend for small engines?

[YZF150]

I have a six-pack of Castrol Syntec Blend 5w-30 that I acquired, and I don't want to use it in vehicles.

What about these engines, in your opinion:

6HP B&S mower
5HP Tecumseh chipper
3HP B&S tiller

 

[Bror Jace]

YZF150, sure. Unless any of those are badly worn and consuming a great deal of oil, I'd use the Syntec Blend ... a blend of mostly Group II and a little Group III.

I don't have any charts handy so I don't know which region you live in. As long as it doesn't get too hot, I'd consider the 5W30 to be OK for short interval use.

--- Bror Jace

 

[userfriendly]

Is the term "synthetic blend" different than the term "semi-synthetic"?
I thought a synthetic blend was a blend of various synthetic base oils, where as a semi synthetic was a mix of conventional and synthetic base oils.

 

[YZF150]

In this oil, Group III and Group II oils. Group III is Castrol's so-called "synthetic".

 

[Bror Jace]

user, they should be the same thing: "semi-synthetic" and "synthetic blend," that is.

When casting dispersions on Group III oils claiming to be synthetic (as I often do) I call them "Group III pretenders" or "Psuedo-synthetics."

--- Bror Jace