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Read our primer articles on High Mileage Oil, Synthetic Oil and Kinematic Viscosity

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That's true and here's why. During idle times at the line or moving into place a lot of fuel is being dumped into the oil. Synthetic oil will separate the fuel causing it to pool. If the fuel is picked up and circulated then you have catastrophic failure. With the vibrations and force being exerted it isn't difficult to reach that point. A high quality petroleum oil with high zinc content among other additives will allow the oil to dilute the fuel. The problem here is, the oil needs to be of sufficient quality to keep from foaming, have a strong enough friction modification package to protect flat tappet cams, etc. and should not be expected to survive more than a couple of passes. PM me or provide your email and I will send you information.

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