Originally Posted By: KrisZ
Originally Posted By: Johnny248
Before I get shot at, I just thought I throw out my idea on this whole idea of "cleaning" engines...Most engines don't have a problem with not being clean if oil changes have been performed at normal intervals with a quality oil to begin with?
You're right, most engines that are regurarly maintained don't need cleaning.
Here is my Focus with 85k miles and nothing but MC 5w20 by the previous owner. What's exactly there to clean?
Here is my Mazda with about 105k miles. First 60k was with some dino, and various synthetics, the rest were done with dino. Both look exactly the same cleanliness wise.
How does this address Pennzoil's claims of keeping pistons clean? Much different operating environment. A view of the top end of your engine through the oil fill hole (or even under the full valve covers) does not show the cleanliness of the pistons.
Originally Posted By: Johnny248
Before I get shot at, I just thought I throw out my idea on this whole idea of "cleaning" engines...Most engines don't have a problem with not being clean if oil changes have been performed at normal intervals with a quality oil to begin with?
You're right, most engines that are regurarly maintained don't need cleaning.
Here is my Focus with 85k miles and nothing but MC 5w20 by the previous owner. What's exactly there to clean?
Here is my Mazda with about 105k miles. First 60k was with some dino, and various synthetics, the rest were done with dino. Both look exactly the same cleanliness wise.
How does this address Pennzoil's claims of keeping pistons clean? Much different operating environment. A view of the top end of your engine through the oil fill hole (or even under the full valve covers) does not show the cleanliness of the pistons.