What do you think about this data sheet? 10w60

Status
Not open for further replies.
L

lars11

Joined
Dec 16, 2006
Messages
972
Location
Sweden
A 10w-60 synth SM/CF A3/B3. Thinking of running it in a 5.0 Mercruiser EFI, oci 40-60 hrs. What's your verdict? Test Specification Method Appearance Clear & Bright Brown Oil T11 Kinematic Viscosity @ 40°C 135 – 155 cSt T34 Kinematic Viscosity @ 100°C 23.0 – 26.0 cSt T34 Oil Color – Lovibond 3.0 – 4.0 T89 Density @ 15°C 0.856 – 0.876 T90 Calcium (%w/w) 0.276 – 0.338 XRF Phosphorus (%w/w) 0.077 – 0.093 XRF Zinc (%w/w) 0.084 – 0.102 XRF TYPICAL DATA Test Value Method Cold Crank Simulator @ -25°C 6 100 cps T55 Total Base Number (mgKOH/g) 10.1 ASTM D445 Sulfated Ash 1.26 ASTM D874 Viscosity Index 173 T87 Pour Point (°C) -39 ASTM D97 Flash Point (°C) 220 ASTM D93
 
What does your manual say? Here, they want a 25w-40 changed every 50 hrs. Many guys just run a mineral 15w-40.
 
It will be a 40 grade before you get too many hours on it. Start with a stout 40 grade, such as suggested above.
 
Aren't we talking about a 305 cu. in. Chevy engine that runs at a steadily higher RPM as a car/truck but in the cooler temp range? Then why are the boat engine manufacturers stuck in the 1960's for super thick oil viscosity?
 
Because they don't care about incremental gains in fuel economy and because boat engines run at max HP or close to it for extended periods. Additive packages in low viscosity oils are fine but viscosity is still the first line of defense against wear.
 
Originally Posted By: exShuttlemech
Aren't we talking about a 305 cu. in. Chevy engine that runs at a steadily higher RPM as a car/truck but in the cooler temp range? Then why are the boat engine manufacturers stuck in the 1960's for super thick oil viscosity?
1. A boat at cruising is like towing a heavy trailer uphill in second gear. 2. Oil temps on the models not fortunate enough to have an oil cooler are severe. 3. Oil temps on models with an oil cooler can still be severe. 4. Volvo Penta tried to get away with using a synthetic SAE 30 diesel engine oil for the Chevy small block based engines and got bad wear results. 20w50 is as good as it gets unless living in ice.
 
my engine has no oil cooler, and volvo recommends 15w50 mineral or 15w40 diesel VDS-3 rated oil for this engine up until 2008 (when they added catalysts). So I bought volvo penta VDS-3 oil as it was cheaper (????) than Mobil delvac MX that I used to run. Makes me think volvo is aiming at minimum 40 hot viscosity and a diesel add pack for wear. Mercruiser seem to use oil coolers and their standard oil is the 25w40 so it seems fair to say the gm v8 need a 40, at least.
 
Why should it? depends on the film reqs and also the surface properties of the parts. Maybe the bearings in a comp is tight and controlled temp?
 
Originally Posted By: exShuttlemech
Turbine oil is very thin, why doesn't this theory apply to them?
Apples to oranges. Just the mere fact that a turbine engine has no reciprocating parts is a major factor. There are 1000 others.
 
Status
Not open for further replies.

Similar threads

V
Castrol 10w-30 vs Mobil 15w-40
Replies
14
Views
3K
PimTac
F
  • Locked
What do you think about this 75W90 oil?
Replies
2
Views
1K
ARCOgraphite
O
  • Locked
What do you guys think of this oil? Any good?
Replies
7
Views
2K
CharBaby
L
  • Locked
What do you think about this oil?
Replies
6
Views
2K
lonestar
Top