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Author Topic:   synthetic oils plus or minus?
Cpt Quint posted 08-28-2001 01:28 PM ET (US)   Profile for Cpt Quint   Send Email to Cpt Quint  
I get different opinions so I thought Id ask
you guys.
1990ish 90 hp spl 88 Evinrude. Last year I began running synthetic 2 cycle (manual add to gas not oil injection). I also used synthetic lower gear on my seasonal change.

Seems to run smoother on my 63 Nauset but I am uncertain if the longer term effects of using these products is a plus on a minus and would appreciate any feedback on this.

SuburbanBoy posted 08-28-2001 02:09 PM ET (US)     Profile for SuburbanBoy  Send Email to SuburbanBoy     
Take a look here:


sorcerer posted 08-28-2001 02:37 PM ET (US)     Profile for sorcerer
SuburbanBoy posted 08-28-2001 11:18 PM ET (US)     Profile for SuburbanBoy  Send Email to SuburbanBoy     
You shamed me into a little research. Hopefully this works:

bdb posted 08-30-2001 07:16 AM ET (US)     Profile for bdb  Send Email to bdb     
I've used Amsoil's synthetic injector oil this summer, in an '86 70hp Evinrude VRO. While I can't tell you what the "guts" of the engine look like, I can pass on the following observations: Smoke; less than before, usually only at start-up, and then brief. Smell; none. Spark plugs; this is a subjective call, but they're quite a bit cleaner than before. In general, the engine runs along fine and seems to like the diet. All that being said, I don't know if there is any great difference between this product and a premium oil. I think I only paid about $12.00 a gallon, so nothing earth-shattering there either.

In the past, when needing to mix oil and gas, I have had great success with Amsoil's 100:1 synthetic. This is mixed 100:1 vs 50:1. In this case you will notice some significant improvement in the areas of smoke and engine smoothness and "happiness." Plugs will be very clean and last very long. As I've stated before I use this mix in everything 2-stroke I own.

LHG has volunteered to do one of his unique side-by-side comparisons using his Merc 115s. He'll be using the 100:1 on one side and a mineral 50:1 on the other. His observations should provide some great feedback, pro or con.

By the way Larry, if the 100:1 oiled engine toasts, I never heard of you!

Harpoon Harry

SuburbanBoy posted 09-02-2001 11:25 AM ET (US)     Profile for SuburbanBoy  Send Email to SuburbanBoy     
Harpoon, thanks for your promised update. The smoke factor for my new 70hp Tohatsu with Mercury Premium Plus was high during breakin. Tohatsu calls for both injected oil and a 50:1 pre-mix for the first 10 hours. After I reached the 10 hour mark, I refilled the near empty gas tanks with straight unleaded, and changed the spark plugs. There is now little if any smoke, except when starting from cold. I catch an occasional whiff when restarting hot, but do not see any visible smoke under those conditions. I have not checked the plugs. The lower unit is clean, and the stainless prop has a very tiny amount of darkened film in a small area. This is much different than my older Black Max, which would always drip a little fuel+oil mix at the end of every outing. I am very satisified with the Mercury product. But, I can't speak for internal wear. I suspect (and hope) it is no worse than the lower priced spread...


bigz posted 09-03-2001 10:08 AM ET (US)     Profile for bigz    
This thread might be of interest on this "oily" topic --

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