Vara pune 5W40, treaba ta ce brand, iar iarna pune 10W30!!! ...Schimba-l la 5000-6000 Km si n-ai treaba...Uite asa ajungi la 100.000 si ai motor brici...Treaba aia cu e ulei sintetic si tine mai mult ...ia uite ce zice un domn cercetator"To offset the higher cost of synthetic oil, some of the oil companies claim you can run the oil longer between changes. They say you do not have to change the oil every 3,000 miles. Valvoline does not make that claim. McClanahan says, "The additives in synthetics are superior but they still break down at the same rate and you need to replenish them often. We are unaware of any additive package that lasts longer than what the manufacturer recommends. Those 10,000-mile claims are ludicrous."