A friend at work who owns a 93 40th aniv. edition told me that she had to top off her oil with about 1/4 cup. She then proceeded to tell me she used Penzoil and asked if it was a good brand. I immediately asked if it was a synthetic type as I don't belive Penzoil makes a syn. She said she wasn't shur but did not know what a Synthetic type oil was, so I am assuming it was fossil type oil that she added. I said if it were me I would drain the oil immediately and put in fresh Mobil 1 because of what I have heard -- the two types do not mix well and may cause damage. However; I wasn't sure what could happen if only 1/4 cup of oil was all that was added.
So, is this a recipe for disaster or am I being overly causious? She said she will go 2000 miles before changing the oil again. She takes it to a dealership so I am positive it has Synthetic in it from the last oil change...
So, is this a recipe for disaster or am I being overly causious? She said she will go 2000 miles before changing the oil again. She takes it to a dealership so I am positive it has Synthetic in it from the last oil change...