Regal 53 SC Owner's Manual page 213

ENGINE LUBRICATION OILS
The use of quality engine lubricating oils, along with ap-
propriate oil drain and fi lter maintenance is a critical fac-
tor in engine performance and longer life.
As the engine oil becomes contaminated, many of the
important additives are depleted. Lubricating oils protect
the engine as long as these oil additives are functioning
properly. Continuing contamination of the oil between
oil changes is normal. The accrued contamination will
vary, depending on the engine operation, hours used, fuel
used, and new oil added.
When cruising constantly monitor the oil pressure on the
helm displays.
Use the chart below to recognize acceptable levels of oil
pressure at various engine rpm's.
Cummins® recommends the use of SAE 15-40 heavy
duty engine oil for temperatures above 5 degrees F. Brands
include Valvoline®, Premium Blue-(USA) and Valvoline
Premium Blue Extra (International). A range of accepted
engine oils are listed in the Cummins owner's manual.
Multigrade oil reduces deposit formation on pistons,
rings and valves, reduces friction which increases en-
gine cranking in lower temperature environments, and
increases engine longevity by maintaining lubrication at
higher operating temperatures. The use of synthetic oils
(those manufactured with API group 3 or 4 base stocks)
is permitted, subject to the same viscosity limitation and
performance of petroleum (mineral) based engine oils.
Since multigrade oils provide an estimated 30% lower oil
consumption compared to single grade oils, it is impor-
tant to use multigrade oils to ensure the engine will con-
tinue to meet all applicable emissions requirements.
Refer to the Cummins owner's manual for additional in
formation along with the Cummins QuickServe web-site.
NOTE that it is the responsibility of the yacht owner
to follow the engine manufacturer's recommendations. If
the recommendations are ignored, engine warranty may
be affected.
CAUTION
!
AVOID POSSIBLE VALVE & PISTON DAMAGE
DUE TO EXCESSIVE OIL CONSUMPTION.
CUMMINS RECOMMENDS A SULFATED
ASH LIMIT OF 1.85% ON ALL ENGINE
LUBRICATING OILS.
CHECK PRODUCT CONTAINER.
NOTICE
SPECIAL "BREAK-IN" OILS ARE NOT
RECOMMENDED FOR YOUR CUMMINS
ENGINE. USE THE SAME OIL TYPE
DURING BREAK-IN AS USED IN
NORMAL OPERATION.
NOTICE
DO NOT USE AFTER TREATMENT OIL
ADDITIVES. IT IS POSSIBLE THAT
THESE ADDITIVES MAY REDUCE
THE FINISHED OIL'S ABILITY TO
PROTECT THE ENGINE.
CAUTION
!
TO AVOID POSSIBLE ENGINE DAMAGE
OR POOR ENGINE PERFORMANCE,
NEVER OPERATE THE ENGINE
WITH THE OIL LEVEL BELOW
THE LOW (L) MARK
OR ABOVE THE HIGH (H) MARK.
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Chapter 5