[John B]

Hi all.   I have been using 5 ltr cans of Nulon 5W 40 and have now changed to Nulon 5W 30. As the i30 petrol engine only takes 4 ltr of oil, after 4 engine oil and filter changes I now have 2ltr of 5W 40 left  and 2ltrs of  5W 30.   The question is can I mix these 2 oils to make up 4ltrs for another oil change or is this a no no ?


Thanks.

[pidim]

Your car will now have 5W35. 

But seriously, it should be fine, as the 5W40 exceeds the 5W30 min spec, so if the lower number is acceptable, logic says there should be no problem. I have done it before myself but not on my i30 and involved 1 litre of a different grade which I had left over.

[CraigB]

John, as they're the same brand and additives with only difference being viscosity you'll be fine to mix

[John B]

Thanks fellers ,
                       That will knock the price of my next service down along with my genuine Hy filters I bought for  $9,23 each.     5W 35