 |
Inefficient air filter; defect in
injection system; problem
in exhaust or turbo; use of
incorrect fuel (Refer to
vehicle owners manual). |
Sediment deposits in piston rings
may cause jamming of pistons;
carbon on valves and pistons
impedes cooling; narrowing of
clearances; higher friction in
pistons and bearings; higher fuel
consumption, poor emissions. |
If your test results are
"moderate" or "poor", change oil
and filter. Re-test using
EngineCheckup after 100km to
see if the problem remains or
has been corrected. |
 |
Oil is oxidized or burned
from long oil drain intervals;
short term overheating; low
oil level; wrong oil type;
high level of sulphur in fuel;
high wear particles and dust
in oil. |
Increased viscosity may cause
clogging, corrosion attack on
engine parts (lead, copper, oil
pump), high wear on piston rings
and cylinders; Lacquer-like
substance adheres to filters and
engine parts. |
Service required. Change oil
and filter if test trends to “poor”.
Perform EngineCheckup after
100km to see if the problem
remains or has been corrected. |
 |
Water condenses in the
engine from running cold or
stop-and-go running.
Cooling water with coolant
leaking into the oil. |
Fast oxidization and oil viscosity
change; increased engine wear;
acid formation corrodes non-
ferrous metal (copper, lead, tin). |
Service requiredby specialist to
check thermostat, cooling
system, and engine seals.
Perform EngineCheckup after
100km to see if the problem
remains or has been corrected. |
 |
Unburned fuel condenses
on the pistons and drains
into engine oil due to poorly
tuned carburator, over-
loading cold engine, dirty or
clogged injector nozzles;
faulty ignition timing. |
Reduced lubrication, increased
fuel consumption, thinning of
motor oil, danger of overheating,
higher wear on pistons, rings,
cylinders, bearings, seals,
gaskets. Negative effect on
performance. |
Have
the fuel system
checked by a specialist to
correct the problem. Change oil
and filter, then perform
EngineCheckup after 100km to
see if the problem remains or
has been corrected. |
