Do it yourself, I will never EVER use National for anything again, they are botch with everything they do (well my local one anyway) I got 4 brand new tyres from them a few years back Yokohoma was wasnt cheap, 3 days later 1 of them cracked on the sidewall and they said I did it so they wont do anything for me even thou there was no damage to the paint on my wheel at all
Also they did the tracking on my cuz golf and it was worse than when it went in, he had to take it to another garage and they said and I quote WTF have you done to your tracking?!
My mate took his focus there, for tracking and they told him both his track rod ends where shot and they boh need replacing, I urged him to get a second opintion which he thanked me for after because the next garage he went to told him national where just trying for more work.
I would trust them to not put a filter on or even use castrol tbh mate.
