Car is a 2005 Audi S4. This is the 4.2L 40V V8, not direct inject like the RS4. I drive it 12 months a year but it is NOT a DD since I'm usually doing public transportation. During the warmer months I enjoy autocrossing it or taking it for a track day. Regardless, it's driven 1 or 2 days a week maximum.
Factory fill is 5w40 but I am contemplating moving to something different for warmer months. I'll run 5w40 for the cold months. I live in Chicago so it does get cold, but the car is garaged.
What's a safe viscosity/weight to be running in the summer? 15w50?
Factory fill is 5w40 but I am contemplating moving to something different for warmer months. I'll run 5w40 for the cold months. I live in Chicago so it does get cold, but the car is garaged.
What's a safe viscosity/weight to be running in the summer? 15w50?