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Booth I wrote here becouse i see people here know what they talking about I almost buy castrol by my employer have a good offer for SHELL oils: Helix Ultra 5W-30 Helix HX8 ECT 5W-30 Helix Ultra ECT C3 5W-30 Can i buy them or better take castrol?

Thanks you guys, you give me so many suggestion now I don't know what to choose How about Mazda Original Oil Ultra 5W-30? Or I should find something with Ford WSS-M2C913-D approval and will be ok? I'm really searching for the best one my engine is freshly refurbished.

Hello guys, I hear a lot of good opinion about this forum and i want ask you about what oil I should use. 1) Mazda 3 BK 2007 EU version 2) LF 2.0 150hp 3 ) 4,3l 4) In winter max -15 5) 70% in town 30% in motorway 6) 8-10k km 7) No 8) Almost all 9) 5w-30, ACEA A3 or A5 API SL Thank you all