Castrol Power 1, semi-synthetic?

I recently bought oil for my bike, and as usual i went with the Castrol Power 1, 10W40. I have used this oil for several years, and for some reason i have thought that this is a fully synthetic oil? I looked over the bottle so many times, but for the life of me i can't see if its a full or semi synthetic oil. Dosen't even say on the fricking bottle eyh?

Hmm, maybe i have been in the wrong all these years... And used semi synthetic...

This was the one i bought.

 

Power 1 racing is fully synth.

 

Ok, so it is the "Racing" that is fully synth? So this is semi synth i guess...

I really need to pay more attention..

What do you guys use?

 

Ive been using power 1 racing. Seems decent value for money.

Changing mine every 2.5 to 3k miles.

 

Will keep that in mind next time i buy oil.

Cheers mate.