Is this domain a trademark infringement?

Are you aware that there has been litigation over at least one of the domains you listed in your post? :p

There are some permitted uses of other people's trademarks in domain-names, it's true. They tend to be tested in court, partly according to precedent law, by people with very deep pockets. They also tend to exclude "making money from the site".

You're giving some potentially misleading advice here, Bengirwb.

Among the things that can happen are:-

• They can tell you to take it down
• They can take the domain from you
• They can take from you any money you've ever made through the site
• They can sue you for additional damages

Don't imagine that because "you're helping them to make sales" (as is often the case) they'll decide to be lenient. That isn't how it works. The point is that owning a trademark effectively confers obligations as well as rights on the holder: when it comes to trademark renewal time, if it can be shown that they've knowingly failed to protect their rights with regard to the trademark, that can be held against them. Some companies, for this reason, have the policy of pursuing all breaches of the trademark routinely and without reference to the motives/purposes/circumstances of the defendant.

My own not-legally-qualified, five-word opinion is "Don't even think about it".

Well, what do you think is the OP's reason for asking in a money making forum?
And unless whoever owns that sample Ford domain has circumstances very similar
to the Toyota vs. Tabari case, why wouldn't Ford go after that one?

Search online, and you'll see how aggressive Ford can be.