Home > Products > Motor Oils > 2 Cycle / 2 Stroke Motor Oil > Product: ATO
Outboard 100:1 Pre-Mix Synthetic 2-Stroke Oil (ATO)
Outboard 100:1 Pre-Mix Synthetic 2-Stroke Oil (ATO)

Designed for pre-mix applications as lean as 100:1 ratios or richer. Improves throttle response and lowers or eliminates smoke. Minimizes deposit formation and lowers emissions. Performance emphasis on the cooler operations of water-cooled motors.

Package sizes include:

8-oz. Bottle
8-oz. Bottles (case of 12)
1-Quart Bottle
1-Quart Bottles (case of 12)
30-Gallon Drum
55-Gallon Drum

Product Code: ATO • Brand: AMSOIL




MSDS Data Sheet

Product Details Tech Data Reviews & Rating

Product Applications
Outboard Synthetic 2-Stroke Oil is specifically designed for pre-mix water-cooled two-stroke outboard motors, personal watercraft and jet boats.

Outboard Synthetic 2-Stroke Oil is recommended for 100:1 mix ratios in normal service. Richer mix ratios may be used where desired, although certain benefits such as reduced smoke and deposits may be compromised.

RATIOOILFUEL
32:14.0 oz.1 US GAL
40:13.2 oz.1 US GAL
50:12.6 oz.1 US GAL
80:11.6 oz.1 US GAL
100:11.3 oz.1 US GAL

Product Description
Specifically designed for outboard motors, Outboard 100:1 Pre-Mix Synthetic 2-Stroke Oil contains a heavy dose of low-temperature dispersant additives that excel at reducing varnish and carbon deposit formation in water-cooled motors. Its low-smoke, low-odor, low-toxicity properties produce fewer emissions at 100:1 mix ratios than oils mixed at 50:1, benefitting operators and the environment. Outboard Synthetic 2-Stroke Oil is formulated to prevent "oil loading" and plug fouling for rapid throttle response, making it ideal for trolling motors. Recommended for pre-mix use where TC-W3 is specified.

AMSOIL Synthetic 2-Stroke Oil has been providing improved performance and protection in two-stroke engines since 1973. Trust the extensive experience of AMSOIL, The First in Synthetics®, to do the best job protecting your engine.

Engine Protection
Outboard Synthetic 2-Stroke Oil provides premium protection and performance at 100:1 mix ratios. It is formulated for hot-operating two-stroke outboard motors, effectively fighting carbon/deposit formation and preventing ring sticking.

Smokeless Operation
Outboard Synthetic 2-Stroke Oil's synthetic formulation burns clean. When mixed at 100:1, smoke is virtually undetectable. Boaters subjected to smoke and fumes benefit from these low-emission properties.

  • Excellent lubricity and cleanliness properties
  • Controls friction and helps prevent wear, plug fouling, ring sticking and exhaust port blocking
  • Improves throttle response
  • Lowers or eliminates smoke
  • Delivers outstanding protection and performance at lean mix ratios
  • Anti-rust formulation counteracts the damp environments often encountered in outboard applications

HEALTH & SAFETY
This product is not expected to cause health concerns when used for the intended application and according to the recommendations in the Material Safety Data Sheet (MSDS).

Click here to view the MSDS Data Sheet for AMSOIL ATO.

Keep out of the reach of children. Don't pollute. Return used oil to collection centers.

TYPICAL TECHNICAL PROPERTIES
Saber Outboard Synthetic 100:1 Pre-Mix 2-Cycle Oil (ATO)
Kinematic Viscosity @ 100°C, cSt (ASTM D445)17.9
Kinematic Viscosity @ 40°C, cSt (ASTM D445)141.2
Viscosity Index (ASTM D2270)141
Pour Point °C (°F) (ASTM D97)-33 (-27)
Flash Point °C (°F) (ASTM D92) 120 (248)
Fire Point °C (°F) (ASTM D92) 138 (280)

Did this product meet your expectations?

(click on a star to rate)
Product Name: Outboard 100:1 Pre-Mix Synthetic 2-Stroke Oil (ATO)
Current Rating: 4.69 out of 5 stars
Total Votes: 13 vote(s)

A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Gerald: space

Great product

Use in my outboard, no smoke , plugs clean, easy starting, can't ask for more. Have used for many years.

Item Reviewed: Outboard 100:1 Pre-Mix Synthetic 2-Stroke Oil (ATO)

A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by 77 CVX16: space

Great stuff

Started using Amsoil 100:1 outboard oil two years ago. It considerably reduced the smoke and idle load up on my 1990 Johnson GT150. Now she purrs like a kitten on idle and roars to life under power! Love this stuff. Highly recommend.

Item Reviewed: Outboard 100:1 Pre-Mix Synthetic 2-Stroke Oil (ATO)

A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Jan R: space

Great product

This 100:1 premix works great for my 115 outboard. I disconnected the oil injection before it failed and ruined my motor. Now converting my jet skis to premix.

Item Reviewed: Outboard 100:1 Pre-Mix Synthetic 2-Stroke Oil (ATO)

A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Rick The Wrench: space

i have been buying this product for over 20 years

I have been repairing outboards for over 35 years and the outboards that this product shines at are the OMC'S Johnson and Evinrude,s they have a vro system that fail and burn up powerheads I have converted them to premix 100 to 1 before and after burn downs and have great reviews as to them running better than they did new. They start better idle better and all around run better with less smok.

Item Reviewed: Outboard 100:1 Pre-Mix Synthetic 2-Stroke Oil (ATO)

A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by 91 Johnson: space

Great Product

The oiler for my outboard has been removed and I premix the gas and oil. I have been running the 100 to 1 AMSOIL at a100 to 1 ratio for 6 years or more. I push the little 60 hard and have had no oil related problems. There is virtually no smoke and I have never fouled a plug. This is a great product. I think it has extended the life of the engine because the mechanics I consult tell me most of these motor are done in when the oiler fails. Its a great product that I will continue to use.

Item Reviewed: Outboard 100:1 Pre-Mix Synthetic 2-Stroke Oil (ATO)

A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Stephen Orsak: space

First Time

This oil works great! Smoke from the engines reduced

Item Reviewed: Outboard 100:1 Pre-Mix Synthetic 2-Stroke Oil (ATO)

A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Ty: space

Worked good. 2 stroke boat engines smoked less

I used this on 2 boats both being 2 strokes. 1 is a bass boat with a 150 merc. Other is a offshore boat with twin 175 mercs. In both cases I started with 80:1 mix being new to Ams-oil. After intensive research I went for the 100:1 mix. Both boats smoke much less. They dont load up like before idling and trolling. Did a compression check on all 3 motors and all stayed the same. I will continue using this.

Item Reviewed: Outboard 100:1 Pre-Mix Synthetic 2-Stroke Oil (ATO)

A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Postal: space

Good stuff

Ran this oil in my yamaha 50 hp two stroke. Ran smooth and flawlessly. Less smoke and plugs came out clean. Switching all my premix outboards to this oil .

Item Reviewed: Outboard 100:1 Pre-Mix Synthetic 2-Stroke Oil (ATO)

A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Bill: space

So far so good

I purchased this to use in my 1993 Johnson 150. Trying to cut down on smoke. It has helped some. I can say the idle seems much better and the obvious use of oil is cut in half.

Item Reviewed: Outboard 100:1 Pre-Mix Synthetic 2-Stroke Oil (ATO)

A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Keith: space

The smaller container is a win-win for me.

I really like the smaller container. I don't use my boat that much and a quart size bottle lasts for more than a year. The smaller container is just right for me.

Item Reviewed: Outboard 100:1 Pre-Mix Synthetic 2-Stroke Oil (ATO)

A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Capelee: space

Best hi perfect outboard oil

I used this oil for several years... ran out and bought some Mercury synthetic oil. My engine blew up a month later. So I'm back to the Amsoil and I have to say I think it's the best product on the market. If you have a V-6 that you run at high rpm and you want peace of mind, then I would buy this oil and nothing else. No smoke, excellent low idle, high speed confidence.

Item Reviewed: Outboard 100:1 Pre-Mix Synthetic 2-Stroke Oil (ATO)
Share your AMSOIL Experience
by writing a review
smaller | bigger





Click Here to Report Problems Or Comments
3 Easy ways to place your order now!



Free Shipping Information
Order AMSOIL Catalog
 Bookmark This PageBookmark This Page!
Receive AMSOIL's Confidential Factory Direct Wholesale Price List in your email.
Enter your first name & email address and click on "eMail Price List" button!
AMSOIL Online Store
AMSOIL Preferred Customer Program. Save upto 25%!
Wholesale Business Accounts
Become an AMSOIL Dealer!
Request FREE AMSOIL Catalog
Questions? Please Contact us
Order AMSOIL By Phone
AMSOIL Online Store
Order AMSOIL By Fax
VISA and MASTERCARD is accepted for US and Canada.
Discover and American Express is accepted for US customers only
Go to Top

Select your country.

Canada
Ships from Canada. Prices in CA dollars. United States
Ships from USA. Prices in US dollars.