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Oil
foaming and drivability problems in Ford/International diesel engines. What can
you do?
Navistar/International diesel diesel engines with Hydraulic Electronic Unit
Injectors, used in Ford pickups, vans and school buses, sometimes suffer
drivability problems due to oil foaming. Leaching of RTV silicone from the oil
pan gasket into the oil causes the foaming. Foamy oil interferes with fuel
injection, which reduces engine power.
The ASTM D 892 Foam Test, Sequences 2 and 4, are used to evaluate diesel oils on
their foaming characteristics relevant to this engine. Recent testing performed
by an independent lab shows the results below.
According to test results (see below), AMSOIL Synthetic
15W-40 Heavy Duty Diesel and Marine Oil (AME) and
AMSOIL Series 3000 Synthetic
5W-30 Heavy Duty Diesel Oil (HDD) are clearly
not prone to foaming or
contributory to the foam-caused drivability problems of the IH engine.
The test also shows AME and HDD dissipate foam more quickly than Rotella T, a
popular diesel oil often recommended by Ford. Faster foam dissipation means
reduced foam related drivability problems.
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1-800-305-2688
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