Originally Posted By: LotI
Originally Posted By: Danh
Despite Blackstone’s comments, looking at viscosity there may be quite a bit of fuel in this sample. This could explain the relatively high iron/1,000 miles. If it were my car, I’d cut the OCI to 5,000 miles to see if it made a difference.
Agreed. Mazda says 7,500 miles max in the US under ideal conditions. Why go further?
Don’t they use salt on the roads in Iowa? That falls under severe according to Mazda. Is this EP or AFE?
I would change it sooner also, without the 5w30 you added, your viscosity would have been even lower.jmho