Amsoil 100:1 Marine 2 Stroke Oil
- Thread starter Nuclear_42
- Start date
25:1 is what's recommended by my 2 stroke oil supplier. Since we use metric, it's much easier than 16:1 or 32:1 to measure out. I guess they know something....
Amsoil needs to knock this cr*p off. I'd run Pennzoil from Walmart and call it a great day. How is an owner of a very expensive outboard motor to know when he's using the right amount of oil? Trust Amsoil? pfft!
Last edited:
Knock what off exactly? Amsoil says you can run 50:1 if you like, but that might be a bit too much oil. Why not trust Amsoil?
Watch Richard Flagg on YouTube if you wish. He opens an engine after using Amsoil 100:1. The film strength is not there. I am using Saber at 50:1 in my lawn equipment and have opened it up to see, and coating was just right. So, would I use it at 100:1? Never. Watch Scott Kunz, a well-respected chainsaw mod man, and you will hear the same. Flagg had same result with Opti-2. Look at how much GM has lost because of recommending 0w20 in a particular engine.... then look at their remedy. 0w40. My point is that Amsoil baits people into running their oil at 100:1 when it's not the best ratio.... but Amsoil is very indistinct... leaving consumers uncertain. Look at how Saber was recommended for motocross, then suddenly that recommendation was yanked. I buy Amsoil. I like it. But.... read the label on Saber. Amsoil "infers" that it meets JASO FD but there is NO certification. On and on with Amsoil. I use it and I like it but Amsoil runs their marketing in snake oil fashion.
- Joined
- Nov 9, 2024
- Messages
- 15
100:1 might work if you are ONLY trolling...
I can also see people running 100:1 on YouTube with no problems. But thanks for being fair and including Opti-2. Amsoil has, since I started in 1999, had 50:1 => 100:1 as an option with Saber. It's interesting you including the GM fiasco, because those failures were not related to the oil viscosity, the root cause was the crank machining and 0W-40 was just a stop gap recommendation. I've never seen Saber recommended for Motocross - maybe this was many years ago, before Dominator. And yes Amsoil lacks real JASO FD listing.
All this said, I do agree. Amsoil IS UNCLEAR in many cases.
I was thinking about the Saber some time ago. Does it cover JASO FD at 100:1 or at 50:1 or both? If it doesn't at 50:1, that might be why they advertise that can be used at 100:1 too. I don't recommend to use any oil below 50:1. And yes, I've watched the most popular videos of the Richard Flagg videos.
He bashes on oils that missing JASO FC/FD certification and call them crap, but when I asked him why racing oils are not JASO certified (HP2, Motul 800, Maxima, Klotz) - he didn't answer.
No, man. You gotta use the oem spec 50:1. Evinrude experimented with different oil ratios in their outboards. 100:1 made the most power, but broke the motors. They tried 75:1 for improved reliability, but they settled on 50:1 for the best combination of power and reliability. No way would I run 100:1. The above posters seem to agree.
- Joined
- Nov 9, 2024
- Messages
- 15
My guess is the top 2 cycle racing oils lack the detergent pack to fullfill the Jaso FC/FD detergency performance requirement. It's trade-off: those additives take up space that could fit actual lubricant molecules. Ex: Amsoil has "Interceptor" product and a "Dominator" product. Both are full-ester fomulas, but the first is marketed as a XPS synthetic snowmobile equivlent. Those snowmobiles are very complicated, direct injected, exhaust valve engines that are not meant to be dissassembled often for cleaning and thus are designed around JASO FC/FD, high detergency oils specs. Now, someone uploaded here a VOA of the XPS, Interceptor and Dominator oils: XPS had both Moly (fricction modifier) and Calcium (detergent) additives, Interceptor (Jaso FD), had just the Calcium, and their Dominator (racing, non Jaso) had no Calcium detergent. So while Dominator racing oil could (and probably does) have a Better lubricity than Interceptor, it cant fit the JASO FC/FD spec because it lacks the detergency you'd want for a complicated engine like those on the snowmobiles. (And ou wont even need that extra lubricity on a stock engine anyway) sorry for the convoluted explanation.
Interesting that the 8 to 1 made the most power. Is that because of the BTU content of all that oil in the mix? I believe that carbureted two strokes run leaner with a heavier oil mix due to the increased fuel viscosity, maybe that had something to do with it?
Keep in mind, though Amsoil has been at it since prior to Mobil One, they have no certifications, such as SAE Sunburst or API or any manufacturers' certs. Reason: Their proprietary base stocks don't qualify because they have too much zinc and other additives, which are used to protect the engine more than the catalytic converter. I believe their OEM version meets a few manufacturer specs that are equivalent to their OEM oils. I see no API specs for the TCW-3, and I won't risk my engine by running it with so little lubricant. Personally, I run my '91 9.9 hp Johnson, my '84 Evinrude 60 hp twin, and my '85 Merc 135 hp tower of power at 40:1 because it makes me feel good, and I have never lost a powerhead at that mixture, ever, and I have owned a lot of them.
Pablo, at one time I owned and operated a Candian fishing lodge with many Yamaha outboards of various sizes. The non oil injected ones all called for 100:1 mix oil ratio. What we found was that motors ran on 100:1 started to lose a bit of power significantly sooner than those ran at 50:1. Granted this wasn't with Amsoil and these motors were ran more in a season than most would put on in a lifetime.
With that said I would warn against using 100:1 in any outboard, even when the Oem calls for that ratio.
Carbs need to be tuned for the oil ratio amongst other variables.
