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Author Topic:   Mercury OptiMax: Best Two-stroke Oil
MATTANZA posted 11-24-2006 11:51 PM ET (US)   Profile for MATTANZA   Send Email to MATTANZA  
What's the best brand and type of two-stroke oil for my 2001 225-HP Optimax, or does it matter?
jimh posted 11-25-2006 09:31 AM ET (US)     Profile for jimh  Send Email to jimh     
The oil that is "the best" is probably the one recommended by the manufacturer. The last time this topic came up (about two weeks ago), I said:


"Mercury recommends a particular oil for their OptiMax motor because they believe it will give you better performance. The advantages usually cited are less plug fouling, less smoke, and less carbon build up in the engine as compared to using a base oil with TCW-3 certification.

"Many people use premium oil in their two stroke motors and experience improved running characteristics and fewer problems with fouling, smoke, and carbon build up. Other people run off-brand base TCW-3 oils, but they mix up their own witch's brew of fuel additives to try to improve the engine performance.

"Personally, I find it odd that people will bulk at paying a few dollars more per gallon of oil, yet they will add $7-per-pint additives to their gasoline. I do not understand why they think it is a waste of money to pay $7-per-gallon more for oil, but it is not a waste of money to add $7 fuel additives to their gasoline at about the same rate as they would have used the more expensive oil.

"The conventional wisdom says that premium oils are just a way for an engine maker to reap extra profits. The premium oils may be a nice profit center, but, if they delivery improved performance, they may be worth it.

"There are many anecdotal reports for both outcomes when using premium oil: some say it makes a difference, and others say it does not make a difference. The best way to resolve this for your situation it to try both types of oil and see if there is any difference in engine performance."

Furry posted 02-12-2007 02:32 AM ET (US)     Profile for Furry  Send Email to Furry     
I have been running a Merc 240 SJ and I run Amsoil and I know quite a few guys with 200 Opti's run it up here in Canada with no problem what so ever. Not knocking Optimax/DFI oil but it is a synthetic blend so why not run a full synthetic and receive the full benefit. Plus I can buy Amsoil HP Injector Synthetic 2-Cycle Oil cheaper than Mercury Optimax/DFI Oil. Amsoil I am paying $9.85 per US QT Canadian $ and Mercury Optimax/DFI oil I would pay $11.25 pre US QT Canadian $. I am going to trade boats here this spring and I am going to get a 175 Optimax and I will run Amsoil guaranteed. 1) No smoke 2) better shear and heat protection 3) warranty approved and etc. Here is a write up from the Amsoil site:

HP Injector Synthetic 2-Cycle Oil (HPI)
Excellent for all outboard motors with a performance emphasis on modern direct fuel injected (DFI) technology. Also recommended for personal watercraft, jet boats, motorcycles, snowmobiles and ATVs. Injector use or 50:1 premix.

See Pricing Information or Place an Order

Package sizes include:

1-Quart Bottle
1-Quart Bottles (case of 12)
1-Gallon Bottle
1-Gallon Bottles (case of 4)
16-Gallon Keg

AMSOIL 2-Cycle Oil Lineup
HPI Applications
"The Fabulous Four"
HP Injector Synthetic 2-Cycle Oil (HPI)
Saber Professional Synthetic 100:1 Pre-Mix 2-Cycle Oil (ATP)
Saber Outboard Synthetic 100:1 Pre-Mix 2-Cycle Oil (ATO)
INTERCEPTOR Synthetic 2-Cycle Oil (AIT)
DOMINATOR Synthetic 2-Cycle Racing Oil (TDR)

Superior performance in DFI outboard motors
Prevents piston and combustion chamber deposits
Prevents "ring jacking" common to DFI outboards
Low smoke, low odor product
Contains up to 30 percent more additives for "super clean" operation
Prevents wear for long engine life
Prevents rust
Multi-functional and recommended for use in many two-cycle motors
Low aquatic toxicity
Recommended for use as injection oil or at a 50:1 pre-mix
HP Injector is a precise synthetic formulation that exceeds the lubrication demands of modern two-cycle motors. Today's two-cycle outboard motors operate at higher temperatures and at leaner oil and fuel ratios than older motors. This difficult operating environment requires proper lubrication technology to keep motors running long and strong. HP Injector is a premium lubricant engineered with AMSOIL synthetic base oils and MAXDOSE advanced additives. It contains up to 30 percent more additives than other TC-W3 two-cycle oils for "super clean" operation. And because AMSOIL synthetic oils are more durable, they are perfect for lean mixture operations. In addition, this AMSOIL exclusive product produces low smoke and odor and has low aquatic toxicity properties, making it ideal for boats.

HP Injector improves engine life. It prevents engine damage from deposits that cause ring sticking and ring jacking (carbon build-up behind the ring, forcing it outward), a phenomenon that occurs in modern DFI outboard motors. HP Injector reduces wear. It has excellent lubricity properties and provides a good lubricating oil film, protecting pistons and bearings. HP Injector inhibits rust, an important feature where motors are subjected to water. HP Injector provides superior performance in direct fuel injected (DFI), electronic fuel injected (EFI) and carbureted outboard motors, as well as other recreational equipment.

Applications (see Two-Cycle Recommendations Chart)
HP Injector is recommended for use in all two-cycle outboard motors including, but not limited to, Mercury® EFI & Optimax®, Johnson® and Evinrude® FICHT® and E-TEC™, Yamaha® HPDI, Nissan® and Tohatsu® TLDI®, Suzuki®, Mariner® and Force®. Also recommended for use in all two-cycle personal watercraft and jet boats, as well as snowmobiles, motorcycles and ATVs.

Use as injection oil or as 50:1 pre-mix (2.6 oz. per U.S. gallon of gas) where NMMA TC-W3 or API TC oils are specified. Compatible with mineral and synthetic TC-W3 type two-cycle oils, however, mixing two-cycle oils should be minimized.

HP Injector Synthetic 2-Cycle Oil
Kinematic Viscosity @ 100°C, cSt (ASTM D-445)
Kinematic Viscosity @ 40°C, cSt (ASTM D-445)
Viscosity Index (ASTM D-2270) 173
Pour Point °C (°F) (ASTM D 97)
-46 (-51)
Flash Point °C (°F) (ASTM D 92)
86 (186)
Fire Point °C (°F) (ASTM D 92) 86 (186)
DANGER: harmful or fatal if swallowed. Contains synthetic lubricant and petroleum distillates. If swallowed do not induce vomiting. Contact a physician immediately. Keep away from fire, heat and open flame. Use with adequate ventilation. Avoid frequent or prolonged skin contact. Flush eyes with water for 15 minutes in case of contact. KEEP OUT OF REACH OF CHILDREN.

gss036 posted 02-12-2007 01:49 PM ET (US)     Profile for gss036  Send Email to gss036     
Furry, good advertising for AMSOIL, but no where do you mention that it is rated TCW-3? Why is that?
Furry posted 02-13-2007 11:46 AM ET (US)     Profile for Furry  Send Email to Furry     
Well I don't mean to be a smart a$$ but right at the end of the first paragraph it states (NMMA TC-W3, API TC) and I will reinsert the paragraph:

HP Injector Synthetic 2-Cycle Oil (HPI)
Excellent for all outboard motors with a performance emphasis on modern direct fuel injected (DFI) technology. Also recommended for personal watercraft, jet boats, motorcycles, snowmobiles and ATVs. Injector use or 50:1 premix.

But if we read instead of criticize we all could get along better. I thank you fro you input gss036.

lurkynot posted 02-13-2007 07:05 PM ET (US)     Profile for lurkynot  Send Email to lurkynot     
I have an 01' 135 Opti and average 100hrs a season - well over 500 now. I started out with the non - DFI Mercury oil and put 200 hrs on the first set of plugs and they looked if they could have gone another 200 if I left them in. Switched to Mercurys DFI version of the same oil and the only thing I noticed different was the cost. Did'nt smoke any less, run any hotter, same performance and economy and the second set of plugs looked no different from the first set after the same number of hours. I will admit I have not gone back to the cheaper version of Mercurys 2 stroke oil for peace of mind and the fact that the engine uses so little of it to begin with.
gss036 posted 02-14-2007 01:40 AM ET (US)     Profile for gss036  Send Email to gss036     
Furry, My apoligies, did not mean to offend you, but I have read several oil war threads in the past. Below is aa "CUT & PASTE" from another board.

"Amsoil makes an outboard 4-stroke oil that is NMMA FC-W certified, but there is no listing for a certification for Amsoil TC-W3 status on the NMMA oil list."

"TC-W3 certification registration is a 5 digit number preceded by the letters " RL ". Perhaps you can call Amsoil and ask them what the TC-W3 certification number is for each of their 2-stroke outboard oils, and why its not imprinted on each container as required by NMMA."

I was just wondering if you knew for sure. I haven't checked the product bottles, nor do I use the product.

I really do not want to hijack this thread, so this will be the last post on the subject for me.

Furry posted 02-15-2007 05:36 PM ET (US)     Profile for Furry  Send Email to Furry     
This is the response I recieved from Amsoil:

Thank you for contacting AMSOIL with your concern.

In response to your inquiry, the AMSOIL products directed toward 2-cycle marine applications have not been submitted to NMMA for review or certification. They have however been subjected to the test protocol outlined in the TC-W3 standard by an independent testing facility I would however, suggest some caution when considering NMMA certified lubricants. As the NMMA evaluation protocol stands today, it does not take into consideration some of the new engine design technologies commonplace within the 2T outboard industry. An example of such an oversight would be in the area of direct fuel injection. Knowing that, we have also subjected these products to additional performance evaluations beyond that called for by the TC-W3 standard. This additional review allows us to recommend the use of these products in both old as well as new applications with a high level of confidence.

Thank you again for the opportunity to respond to your concerns. As always, please feel free to contact us again if we can be of further assistance.


David Anderson

Technical Product Manager, Power Sports Group


and here is a link to what engines are used to do the tests and they are a joke there are no high performance or DI engines used to test the oils properly

And another

So what I get out of what I have read the NMMA TC-W3 tests are only relevent to 70 HP and uder any other opinions greatly appreciated.

Furry posted 02-15-2007 05:45 PM ET (US)     Profile for Furry  Send Email to Furry     
OK let me try this again with the linksto how NMMA tests oil.

Hope it works this time

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