Mercury 175 Optimax XS

**spidee** · 11-06-2010, 09:32 PM

What oil is used now it confusing!
Mercury site lists Optimax DFI oil for motor .
I thought Premium Plus was used in the Pro XS's
What's the right oil to use now!

175 Pro XS Specifications

<TABLE style="WIDTH: 100%; DISPLAY: none" id=specs_0 cellSpacing=0 jQuery1289097077913="383"><TBODY><TR class=odd><TH>HP/Kw @ Prop</TH><TD>115 / 84.5</TD></TR><TR class=even><TH>Full throttle RPM</TH><TD>5000-5750</TD></TR><TR class=odd><TH>Cylinder Configuration</TH><TD>3 (in-line)</TD></TR><TR class=even><TH>Displacement (CID / CC)</TH><TD>92.9 / 1526</TD></TR><TR class=odd><TH>Bore and Stroke (in / mm)</TH><TD>3.63 x 3.00in
92 x 76mm</TD></TR><TR class=even><TH>Fuel Induction System</TH><TD>Naturally aspirated</TD></TR><TR class=odd><TH>Ignition</TH><TD>SmartCraft PCM</TD></TR><TR class=even><TH>Fuel System</TH><TD>2-stage Direct Fuel Injection (DFI)</TD></TR><TR class=odd><TH>Alternator Amp</TH><TD>60 amp / 756 watt (Belt-Driven)</TD></TR><TR class=even><TH>Cooling System</TH><TD>Water-cooled with thermostat </TD></TR><TR class=odd><TH>Starting</TH><TD>Electric</TD></TR><TR class=even><TH>Gearcase Ratio</TH><TD>2.07:1</TD></TR><TR class=odd><TH>Gear Shift</TH><TD>F-N-R</TD></TR><TR class=even><TH>Steering</TH><TD>Big Tiller Compatible
Remote
Tiller Kit</TD></TR><TR class=odd><TH>Trim System</TH><TD>Power Tilt
Power Trim</TD></TR><TR class=even><TH>Counter Rotation</TH><TD>Available</TD></TR><TR class=odd><TH>Exhaust System</TH><TD>Though prop</TD></TR><TR class=even><TH>Shallow water trim range (degrees)</TH><TD>20</TD></TR><TR class=odd><TH>Recommended Oil</TH><TD>Mercury OptiMax/DFI Outboard Oil</TD></TR><TR class=even><TH>Recommended Fuel</TH><TD>87 octane/up to 10% ethanol</TD></TR><TR class=odd><TH>Remote fuel tank optional</TH><TD>Yes</TD></TR><TR class=even><TH>Engine Protection Operator Warning System</TH><TD>Low oil level
Overheat
Over-rev</TD></TR><TR class=odd><TH>Compatible with Smartcraft Digital Technology</TH><TD>Yes</TD></TR><TR class=even><TH>Shaft Length</TH><TD>20 in (508 mm)</TD></TR><TR class=odd><TH>Dry Weight * Lightest model available</TH><TD>375lbs / 170kg</TD></TR></TBODY></TABLE><TABLE style="WIDTH: 100%; DISPLAY: none" id=specs_1 cellSpacing=0 jQuery1289097077913="384"><TBODY><TR class=even><TH>HP/Kw @ Prop</TH><TD>150 / 111</TD></TR><TR class=odd><TH>Full throttle RPM</TH><TD>5250-5750</TD></TR><TR class=even><TH>Cylinder Configuration</TH><TD>V-6 (60 degree vee)</TD></TR><TR class=odd><TH>Displacement (CID / CC)</TH><TD>153 / 2507</TD></TR><TR class=even><TH>Bore and Stroke (in / mm)</TH><TD>3.50 x 2.65in
89 x 67mm</TD></TR><TR class=odd><TH>Fuel Induction System</TH><TD>Naturally aspirated</TD></TR><TR class=even><TH>Ignition</TH><TD>SmartCraft PCM</TD></TR><TR class=odd><TH>Fuel System</TH><TD>2-stage Direct Fuel Injection (DFI)</TD></TR><TR class=even><TH>Alternator Amp</TH><TD>60 amp / 756 watt (Belt-Driven)</TD></TR><TR class=odd><TH>Cooling System</TH><TD>Water-cooled with thermostat </TD></TR><TR class=even><TH>Starting</TH><TD>Electric</TD></TR><TR class=odd><TH>Gearcase Ratio</TH><TD>1.87:1</TD></TR><TR class=even><TH>Gear Shift</TH><TD>F-N-R</TD></TR><TR class=odd><TH>Steering</TH><TD>Big Tiller Compatible
Remote
Tiller Kit</TD></TR><TR class=even><TH>Trim System</TH><TD>Power Tilt
Power Trim</TD></TR><TR class=odd><TH>Counter Rotation</TH><TD>Available</TD></TR><TR class=even><TH>Exhaust System</TH><TD>Though prop</TD></TR><TR class=odd><TH>Shallow water trim range (degrees)</TH><TD>20</TD></TR><TR class=even><TH>Recommended Oil</TH><TD>Mercury OptiMax/DFI Outboard Oil</TD></TR><TR class=odd><TH>Recommended Fuel</TH><TD>87 octane/up to 10% ethanol</TD></TR><TR class=even><TH>Remote fuel tank optional</TH><TD>Yes</TD></TR><TR class=odd><TH>Engine Protection Operator Warning System</TH><TD>Low oil level
Overheat
Over-rev</TD></TR><TR class=even><TH>Compatible with Smartcraft Digital Technology</TH><TD>Yes</TD></TR><TR class=odd><TH>Shaft Length</TH><TD>20 in (508 mm)
25 in (635mm)</TD></TR><TR class=even><TH>Dry Weight * Lightest model available</TH><TD>431lbs / 195kg</TD></TR><TR class=odd><TH>CARB Star Rating</TH><TD>3</TD></TR></TBODY></TABLE><TABLE style="WIDTH: 100%; DISPLAY: table" id=specs_2 cellSpacing=0 jQuery1289097077913="385"><TBODY><TR class=even><TH>HP/Kw @ Prop</TH><TD>175 / 129</TD></TR><TR class=odd><TH>Full throttle RPM</TH><TD>5500-6000</TD></TR><TR class=even><TH>Cylinder Configuration</TH><TD>V-6 (60 degree vee)</TD></TR><TR class=odd><TH>Displacement (CID / CC)</TH><TD>153 / 2507</TD></TR><TR class=even><TH>Bore and Stroke (in / mm)</TH><TD>3.50 x 2.65in
89 x 67mm</TD></TR><TR class=odd><TH>Fuel Induction System</TH><TD>Naturally aspirated</TD></TR><TR class=even><TH>Ignition</TH><TD>SmartCraft PCM</TD></TR><TR class=odd><TH>Fuel System</TH><TD>2-stage Direct Fuel Injection (DFI)</TD></TR><TR class=even><TH>Alternator Amp</TH><TD>60 amp / 756 watt (Belt-Driven)</TD></TR><TR class=odd><TH>Cooling System</TH><TD>Water-cooled with thermostat & pressure-controlled</TD></TR><TR class=even><TH>Starting</TH><TD>Electric</TD></TR><TR class=odd><TH>Gearcase Ratio</TH><TD>1.87:1</TD></TR><TR class=even><TH>Gear Shift</TH><TD>F-N-R</TD></TR><TR class=odd><TH>Steering</TH><TD>Big Tiller Compatible
Remote</TD></TR><TR class=even><TH>Trim System</TH><TD>Power Tilt
Power Trim</TD></TR><TR class=odd><TH>Counter Rotation</TH><TD>Available</TD></TR><TR class=even><TH>Exhaust System</TH><TD>Though prop</TD></TR><TR class=odd><TH>Shallow water trim range (degrees)</TH><TD>20</TD></TR><TR class=even><TH>Recommended Oil</TH><TD>Mercury OptiMax/DFI Outboard Oil</TD></TR><TR class=odd><TH>Recommended Fuel</TH><TD>87 octane/up to 10% ethanol</TD></TR><TR class=even><TH>Engine Protection Operator Warning System</TH><TD>Low oil level
Overheat
Over-rev</TD></TR><TR class=odd><TH>Compatible with Smartcraft Digital Technology</TH><TD>Yes</TD></TR><TR class=even><TH>Shaft Length</TH><TD>20 in (508 mm)
25 in (635mm)</TD></TR><TR class=odd><TH>Dry Weight * Lightest model available</TH><TD>431lbs / 195kg</TD></TR><TR class=even><TH>CARB Star Rating</TH><TD>3</TD></TR></TBODY></TABLE>

**merctech5591** · 11-07-2010, 09:04 AM

mercury recently updated the recomended oil for all opti motors.. you should run your tank as low as possible or let the alarm sound then fill your resv with opti oil. it will cost a little more for the oil but if you find a dealer that carries bulk it will be a little cheaper than buying new gallons.

**spidee** · 11-07-2010, 09:35 AM

Ok so it was premium Plus and they did change it.I thought i was going crazy!
How much difference between the Opti Oil & Premiun Plus?
This will be brand new motor so i want the right oil from the start!

**merctech5591** · 11-07-2010, 08:26 PM

opti oil is going to be a few bucks more but who cares when your paying 11k for a motor. you will be very happy with that motor.

**stokernick** · 11-07-2010, 09:09 PM

I've been using the Opti oil,but for the max rpm running vs low speed I think performance plus would be a better mix.less soot with the Opti oil.............???????????????

**obrien** · 11-11-2010, 10:45 PM

If you are going to run hard on a regular basis, you should use the premium plus. If you are going to keep it in the lower revs then the DFI oil is the way to go.