Castrol GTX 5W-30 engine oil Part or fully synthetic?

[Cosworth750]

Hi everyone.

Can't find a definite answer to this so thought I'd ask here. Is this http://groceries.asda.com/asda-estor...okiesDetect...

Part or fully synthetic oil? Seen it in ASDA for £12.00 and it was next to a bottle of 10W40 GTX oil with "part synthetic oil" written on the front but the 5w30 oil just says "A1 B1 grade" on the back.

Anyone know?

Cheers

[Cosworth750]

McSam said:

GTX in 5W/30 A1 will be part-synthetic, Edge and Magnatec will be fully synthetic.

Cheers mate.

[Cosworth750]

Heres the one in ASDA. I also checked the site and it never came up in 5W30 so it's a tad confusing lol

http://i12.photobucket.com/albums/a220/scoobydoo99...

[Cosworth750]

I'll come to you for any future oil advice Sam, cheers