Have you stopped traveling to distant locations in your vehicle because it consumes a substantial amount of gas? Does getting the problem inspected and repaired seem too expensive because your vehicle is a foreign make? No matter what the price to repair the vehicle might be, it should be taken care of as soon as possible. You don't want the problem to develop into something that is more serious and expensive to repair.
Winter months bring harsh, cold temperatures, which cause a lot of damage to cars that are not prepared. You may think you have anti-freeze and have done all the required maintenance, but there are some things that you should double check; Is your anti-freeze protecting your car during the coldest days? Will your car benefit from having thinner oil and lubricants? It is better to be safe and have your car checked for these issues.