Two Stroke oils

Well, Silkoline Super Two has been the preferred oil of Scott motorcycle owners for the last thirty years or so that I can remember and has apparently much reduced the problems of 'plug fouling and ring sticking which used to afflict the engines when run on 'straight' oils. But then again, with the exception of the little end, Scotts have enjoyed rolling element bearings since 1904!

I certainly have no hesitation in using this or an equivalent modern oil in my old T-S devices, though it has to be said that they do very little work either in terms of running time or applied load.

FWIW, all my two strokes are run on modern SAE30 two stroke oil of one make or another, but of the mineral rather than the synthetic variety...with one exception. On the Petter M's I set the drip feed so that the exhaust pipe is just damp inside. The Atomic, being a full diesel, is happier running on a high detergent SAE30 diesel specific oil, which has cured the problems of ring sticking which I was having. Never had any bearing problems in many many hours of running under load :-)

Regards

Philip T-E

If you have the OLD code for the oil ANY company will happily tell you what the modern equivalents are.

I had no problems with finding the modern equivalent oil for use in a Wilson R10 Self-changing gearbox as used on Hibbard Planet Shunted.

Most Seagull outboards are running modern TC-W3 at ratios between 10:1 and 25:1. All bearings on all the older Seagulls are bronze. It would be quite usual to expect a Seagull to run flat out at full load for hours at a time. I try to keep mine down to about 75% of full throttle to improve economy though I have run about 4 tankfulls through it at full throttle, only stopping to fill the tank. Mine is running Quicksilver TC-W3 at ~ 20:1

Kim,

I run my Tarpen under load at rally's using a modern Two Stroke with no problems.

Mart> I've been advised by a fellow Maytag owner not to use modern TS oils

That's interesting: when I ran a Petter "M" (no 10535 - how's THAT for memory!) I used to use normal engine oil in the Calibrator - would that have hurt it any?

Brian L Dominic

Web Sites: Canals:

Hi Kim, Neo Synthetic two-cycle oil at a ratio of 100:1.

=-=-=-=-=-=-=-=-= Rob Skinner La Habra, California

Have been running SAE30 Non-detergent at 20:1 for years in both singles and twins with no difficulties. Twins will not run under load at 32:1 The engineers say 16:1 for a reason. Suggest using extended nose 14 mm plugs.

As a sweeping generalisation... if your engine has been stripped, cleaned internally,and is in generally good condition, then use a detergent oil. This will prevent, or greatly reduce the amount of clag that builds up inside. OTOH, if the engine hasn't been disturbed for the last 150 years or so, then use a NON detergent oil. This will ensure the clag stays where it is. A detergent oil would start to loosen and remove it, not a good idea, as on a four stroke in particular, it can then block oil feeds and so on.

Here endeth the lesson :-))

Regards

Philip T-E