Как специалист, могу оказать помощь. Вместе мы сможем прийти к правильному ответу.
fuel – and engine oil become more viscous at minus temperatures , which may require more energy to pump them, and in the case of engine oil, the http://stranamasterov.ru/node/1223847 may mean that the oil does not circulate for efficient coating of the engine (especially the walls of the piston cylinder) during the time preceding the start. the engine is warming up.