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Can Diesel Fuel Leak Into Oil Sump?

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Hi all. I have a 673P and have a sneaky suspicion that diesel fuel is making it's way into the oil system. The oil seems to be thinner and sump quantity increases.

I may be seeing things, but has anybody else experienced this? I have just had my injector pump overhauled, so I don't suspect this.


Regards, Rod.

Proud owner of;

1961 Mack B61 prime mover.

1981 International ACCO 1810C DualCab Fire Truck

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