I have two small motors 68 3 HP and 72 6 HP. I run amsoil at 75:1 and it runs great trolling or WOT. Hardly smokes at all. Note these motors call for 24:1. Ran the 6 about 150 hours last year. Did not run the 3 as much but used it all weekend. Thing was pushing a 57 14' crestiner with 400 lbs of people 5 MPH. I was impressed.
<br /><br />Here's the thing. It provides superior lubrication IF USED AT THE NORMAL MIXING RATIO. Lean it out and you lose that advantage! Leaning it out is a crapshoot. At what point does the superior lubrication become just adequate? 60:1? 70:1? 80:1? 90:1? 100:1: Only way to find out is to trash your powerhead, replace it, then mix at the next richer mixture than ruined the first one. Not very cost-effective, is it?<br /><br />The ONLY way to reap the benefits of superior lubrication is to use the superior product at the normal ratio. Otherwise you're pushing it's abilties to the limit. Where is the limit? Blowing powerheads is an awfully expensive way to find out.
Well, Willy:<br /><br /> "This is just plain BS"<br /><br />First off, The ratio of the 100:1 isnt "Really" as we would look at it 100:1. Because there are less solvents in the 100:1 oil than there is in the regular 50:1 oil. So you are in fact running closer to 50:1 that you may think. The fact that the engine blew up was not an oil related issue. Period. A strange coincidence for sure.<br /><br />Second, If you ran the 100:1 at a 50:1 ratio, you would over oil, causing all the over oiling situations, Smoking, plug fowling etc.<br /><br />I value much of what you post, but you are "WAY" off base here.Originally posted by WillyBWright:<br /> My brother ran our 50:1 motor on Amsoil at 100:1 once. Just once. Roached it before the first gallon was used up.
<br />that works out to about 90 to 1 .My point is that<br />I run my ice auger in very harsh conditions.Many times <br />its as cold as -35c and this auger has to cut through more<br /> than 2 feet of ice and cut a dozen or more<br />holes at a time. <br />There is no carbon build up on the pistons. I have<br />never replaced a spark plug or had to clean it.<br />And i have used it for at least 8 seasons almost<br />every weekend till ice out. <br />This oil does its job.
No, that isnt going to happen, but I have seen both of us heated before. I dont think we have ever faced off though.<br /><br />Knowone likes to even closly be called a "lier", But even though I disagree with his statement, I prefure to say, "Miss Informed", or "Not dealing with the facts". I mean, did he have the engine tested to see if it was actually an oil related problem? If it was an oil related problem, it would have effected all the cylinders, not just one, and the bearings would also be effected. There are just too many engines running around out there doing fine on 100:1, and Amsoil has been marketing this oil for 30+ years. If the engine was infact ruined by the oil, Amsoil would have bought him a new one.
Now as far as this statement goes, I may feel the same way if I wasnt into lubrication as much as I am. After all, thats where most of us get our information. (Word of mouth), We just dont always check to see whos mouth it came from and how reliable the information is.<br /><br />Its like if you talk to someone and they tell you that "X" oil caused there engine to sludge up, so you never use "X" oil again. Well, niether of you knew that there was a coolant leak in the engine, and it wasnt the oil at all. But niether of you will use that oil again, and you told all your friends not to either. All based on faulty information. The fact is, that there has not been an oil made in the last 50 years that actually caused sludge build up, it has always been the practices of the engines owners that was at fault. Not changed enough, wrong oil for the application, or just plain, It was good enough for Grandpa so its good enough for me.
Truer words have never been spoken.<br /><br />Perception IS reality to most.
Scali, <br />If you're a bettting man I got money!
<br /><br />1986 is one of the yrs but I don't remember the others. It was mid 80s. Do some web surfing and you can confirm years and motors with 100:1.<br /><br />Here's a story I have posted before...A close friend and fellow sailor of mine used to be THE commercial division warranty mgr at OMC International (Ft Laud) for S.America, Bahamas and Bermuda. The guy is a BSME with MBA and had many stories about ob engines and warranties. I bought a motor through him. He told me the story about corrosion and that's why OMC changed back to 50:1. He also said to run 100:1 if the motor was used weekly and 50:1 if sitting a month in Florida's humid climes. He said there was a huge safety factor even at 100:1. If memory serves right actual lube ratio needed was 150:1 at full throttle and 300:1 at idle.<br /><br />Flip side to this discussion is he said synthetic was not cost effective in terms of motor life for the avg boater.
