- Joined
- Feb 5, 2014
- Posts
- 4,182
- Reaction score
- 3,061
- Location
- Kentucky
- First Name
- David
- Truck Year
- 1986
- Truck Model
- K10/LM7 5.3/4L60e/np208/3.73/32"
- Engine Size
- 10 yrs Air Force
The link below from Penrite (never heard of em today....maybe I'm behind the times) says your oil needs to look dark if it's working "proply". Thoughts? I always assumed the cleaner it is after a few thousand miles, the better the engine is doing.
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