Considering Mobil's purpose to give information not only for customer but also to distributor and business in their website, I'll make the shortcut more visible for each audience (motorists, distributors, businesses). For now the shortcut is very not noticeable, to make it more noticeable I'll use icons and buttons to represent the categories.
There's some misleading information in the current website that make user become confuse, I'll remove those unimportant and confusing part to make user's experience in the website become better and easier.
For the appearance, there will be more interactive flash navigation to make the website become fresher and it'll add curiosity of the audience. The website also will given more solid border/container, current website looks disintegrate and individual-ish.