Dom 
Member 
 
Registered: 13th Sep 03
 
User status: Offline 
 
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Does anyone know what the correct oil is to use in a 03 Z12XE Corsa C? 
 
From what i can find it's either 5W30, 0W40 or 5W40 fully synth or 10W40 semi synth  
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Ellis 
Member 
 
Registered: 11th Sep 07
 Location: Aberdeenshire 
User status: Offline 
 
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5W-40 fully synthetic according to Opie Oils. 
 
Seems a little over the top for that engine.
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Dom 
Member 
 
Registered: 13th Sep 03
 
User status: Offline 
 
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Newer GM engines are apparently 5W30 but there seems to be a load of confusion around the Z12XE in a 2003 car - i think it's because they brought in the twinport around this time. 
 
Think i'll go with 5W40; Shell also recommends it.
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davegreen 
Premium Member
 
Registered: 20th May 12
 Location: Oxfordshire 
User status: Offline 
 
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im using 15w40 as its free!   
hand book for corsa c recommends 10w40 semi or 5w30 fully but I found the 10w40 is more than good enough if changed regular, 5000miles max.
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