Quote:
Originally Posted by bjurke
depends on when your motor was made. not recommended for ohc motor. probably ok for ohv motor. ohc motor made roughly 1999-2011. timing chain guide and cassette wear issues. expensive to repair. use what your owners manual says for this motor.
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thanks for the heads up. I always use MotorCraft, I put what it called for (weight wise) in it. Just didn't know if I should thicken it up a bit due to higher mileage. Runs great as is, almost time for another change and haven't lost a drop yet.
This is my first 4.0, I've been partial to the V8's and ol diesels.