Is there a way to lubricate the front strut mounts? I think they're seizing up, making creaking noises and vibration when turning the wheel at very low speed. I'd like to just try lubricating them before replacing, since the struts seem otherwise OK. (They're original with 116K miles though.) What happens if you remove that big center bolt at the top, can you take off the rubber piece underneath and inject some grease there?