oilily

Flatteringly, obsequiously.

In an oily way; with the appearance or consistency of oil.

[…] the nicest young man that ever was, — daintily gloved, patently booted, oilily curled, snowily wristbanded, with a lovely cambric (prima facie) handkerchief bound about his hyacinthine locks and polished hat.

The tarmac road glistened oilily, the sun poured down, there was a strong smell of warm tar.