Do not over fill the oil in a svx. These cars are well known by the dealers to have thier seals go out due to a half quart too mutch oil. Also, due to the high rpm's that the 3.3 commonly hits, keep the oils to a 10w30 or a 5w30 full syn. or semi synthetic blend. A heavy weight oil will not be pumped fast enough at high rpm's and lead to premature wear on the engine.