Content writer for automotive business

I am seeking a few English content writers for an automotive business. This job is only for freelancers that specialize in automotive related matters and have a great insight into the automotive industry. Among others you will write general automotive articles for the blog, tweets and facebook posts, press releases and promotional material about the services, newsletter and website of our clients. Content will have to be relatively short in length and clearly promotional at times. Valid bids will have to include at least 5 articles/pieces of work (samples or portfolio) on this topic and your best rates for this task. Bids without work samples and rates won't be considered.