Bad usability: Halfords website search

I needed some oil and decided to go to Halfords website and see how much it cost. I typed "10W30" into the search facility and the website searched for "power". As you can see from the image below, this search returned 197 results - not one of which had any relevance to what I was looking for. 

Ironically the oil I wanted does exist on their website but you can’t search for it unless you know to add the word "oil" into the search term. Even then, their website search results seem to prioritise any number of other oils which aren't 10W30 over the one product that is.