The owner of the Esso station is an old hand at trucks. When one is dead he'll say so, not charge for repairs that won't make a difference. His scrupulous honesty compels him to tell Ginrai that the last truck on the lot is rumored to be haunted, and several renters have returned it early as a result.
This doesn't stop Ginrai (who's wildly pleased with the truck) from feigning a lack of interest to get him to lower the price.
The bizarre chain of events which caused Ginrai's Transtector to end up in an Esso garage remains a mystery.