Hello all.I have Mobil 1 5W-30 in my ecotec.I have put on 4000 km since the start of June when I changed it.Winter in Canada is coming and i'm wondering if its o.k. to keep it in till spring (April).My olm is at 62% right now. My trip to work takes 1/2 hour of running time each way.What do you guys think?
BTW this is my first run of synthetic , i have 85000 km on the car.