Recent content by coralman

Thanks for all of the replies and advice! I appreciate it.

98 jeep grand cherokee 4.0 engine. I spend a great deal of time on jeep forums. a lot of jeepers run rotella 15w40, they say for the high zinc content, since the motor is a flat tappet design. This oil is designed for diesels. I was considering running the 10w30 version. But I see they offer the...