2005 Jeep gr cherokee, 3.7, using PP 5w30 at 4-5k intervals with Bosch filter. 145k on the unit.
Using a quart per 4k miles. I do my own oil changes, it comes out black or very dark brown. This oci sending sample to be analyzed.
Question: what are the potential consequences of adding 10 oz of Amsoil PI (polyester amines) to the oil for a short period, say 1000 miles?
Using a quart per 4k miles. I do my own oil changes, it comes out black or very dark brown. This oci sending sample to be analyzed.
Question: what are the potential consequences of adding 10 oz of Amsoil PI (polyester amines) to the oil for a short period, say 1000 miles?