score:3
Nothing in Singapore Airlines baggage regulations, or a random check of a few others, suggests that you cannot pack your olive oil. It's such a valuable commodity, I've done it myself. In a similar, smaller tin, and tripled wrapped in cling film in checked baggage, there were no leaks, or challenges in US customs, although it was declared as a perishable food product.
And nothing in the Russian Federal Customs Service information suggests that it is limited or prohibited. As a precaution, you would want to include it in your passenger customs declaration, as is generally expected when carrying food products.