Which oil??

[asra]

Today I spoke to the Penrite National Sales Manager, he to confirmed that their TS40C is no longer available.Story being one of the important addatives used in the manufacture of their product is no longer available.Greg, Barry, Ross, & MurrayDo you buy your Castrol Active 2T in a 20 Lt. drum ?If so, what is the best going price for it ?Regards Sam []

[asra]

After speaking to several Bike shops (about 5 to be exact)and many speed shops, I have finally come to the conclusion that MOTUL 600 2T is the best oil on the market to suit an Oil injected Rotax 582.The MOTUL 800 2T is same but for pre-mix.Problem is its Bloody expensive.Best price so far is $80.00 per 4LT. or $350.00 per 20LT. Has anyone used this before ?Also, several of the speed shops I spoke to said they use Castrol Activ 2T as their run-in oil.For thoughs who have,or use, Castrol Activ 2T have you pulled apart your engine, and did you find and gumming of rings, plugs, rotory valve, etc.Also what sort of hours have been acheived with this oil ?Regards Confused Sam. [?][?][?]

[asra]

Sam,I guess I have about 600 hours in various two strokes over the years but the most on one particular engine was 260 hours.This was in a two seater with a rotax 618,run on Active 2T, and when training the engine was worked hard.There was no abnormal build up of carbon anywhere in the engine when checked during routine maintenance.Rotax recomend overhaul at 350 hours on their 2 strokes but this is only to cover their own arses,there are plenty of examples of 2 strokes up this way(We have about 100 at Caboolture airport)exceeding 500hrs using Active 2T, Penrite,and TTS.I have bought Active 2T for as little as $19 for 4 litres.But if I ever owned another 2 stroke I would probably use the Castrol TTS.A 2 hundred litre drum split between 10 other flyers would work out pretty cheap per litre.M Barker

[asra]

Is it OK to just change over from 1 oil to another[?]Currently useing that penrite oilRuss....A1014 NT....gods country

[asra]

Russ,There was some literature on changing oils and what not to do but i'm not sure where I read it.I'd probably drain the old stuff out or wait till it got low before puting the new stuff in.If you are going to use synthetic oil be aware there is reduced inhibiting value if the engine isnt used regularly.M Barker

[asra]

Thanks MurrayI firmly beleive you can't beat real life experience, and its good to hear that the Castrol Activ 2T is being used, and very succesfully, in these little motors.Also like the fact that it is 1/3 the price of Motul 600 2T, and 1/2 the price of Castrol TTS.One last question, Is the Castrol Activ 2T a thick oil, and how is it with oil injection ?Regards Sam.

[asra]

2T is a thin mineral based oil,well thiner than Penrite anyway.And the 618 in my old tandem was oil injected.Never had any problems.When Penrite TS40c was first relesed it had a higher temperature pour point,I believe they changed it with the introduction of oil injected Rotaxes.How globules of oil being dumped into the throat of a carby,as is with oil injection, finds its way to all the bearings on a rotax crank is beyond me,but it seems to work.M Barker

[Tim]

G'day Murray. The fuel oil mix from the carby goes in under the piston not on top of it. It then gets compressed in the crankcase (oiling the bearings) and is forced up the top when the piston uncovers the transfer port. But I guess you knew that anyway and are only having another stir. How's the job going as Op's Manager.Tim McClure

[asra]

OK !!!The best Prices so far.1) Motul 600 2T =$328 X 20lt.2) Motul 800 2T =$427 X 20lt. 3) Castrol TTS =$239 X 20lt.4) Castrol ACTIV 2T =$126 X 20lt. Apparently, there isn't $89.00 worth of difference between the Motul 600 2T & Castrol TTS.So, is there $113.00 worth of difference between Castrol TTS & Activ 2T ?Image Insert: 10.29

[asra]

Tim,there are undisscovered tribes in Africa that know the fuel is compressed in the crank case and then forced up the transfer ports to the combustion chamber. What my point was that a premix will find its way to the furtherest reaches of the crank because it is a fine mist where as drops of oil fed into the carby wont.Obviosly I'm wrong because premix and oil injection engines seem to last the same amount of hours.Or do they?.If you put a few drops of Penrite in some fuel it takes a while to dissipate.How does it lubricate an engine doing over 100 RPM a second?.Acting Opperations Manager?. PB once called the Opps Manager "The most powerfull person is ASRA",I'm happy to take on that profile for a short time you worthless underlings.M Barker

[asra]

I have been persuing information about lubricant film strength, it's not something the oil companies publish, obviously there are differences, but how much of the price differences are due to production and research costs, and how much is due to the advertising hype required to create the image that justifies the cost in the consumer's mind, is impossible to say.Wal's experience at Bond Springs, where his engine failure appears to have been due to the use of Mobil 1 is a case in point. I understand that use of such synthetics in an engine previously run on leaded fuel leads to failure due to mobilisation of lead deposits. It seems they blocked the hydraulic lifters in the O 200.You'd think a warning on the container would be appropriate!It is common practice in Oz to use 2 stroke oil in rotaries such as the one I want to use, a friend has been involved in this for about 30 years. My problem arose when I asked the supplier of my reduction drive about the the advisability or otherwise of circulating 2 stroke oil through it. As it uses a planetary set normally lubricated by ATF, which is fairly thin, one would expect a good quality 2 stroke oil to do it well. I got some response from the Rotary Engine website, but does anyone out there have any OBJECTIVE information?John EvansThink logically and do things well, think laterally and do things better.

[asra]

OK,I now know how the oil gets to the outside bearings on a Rotax crank,there are two small transfer ports in the top case that leed to the outside two.John,I can see why you want to run the rotary on 2 srtoke blend but why in the gearbox?.M Barker

[asra]

Murray, A big poohey on your title!!!worthless underling 235142

[asra]

Murray, the gearbox I am using has been specially developed for the Mazda rotary. As well as the usual point and line contact bearings, it has a plain bearing requiring that oil be circulated through it. It uses a planetery set out of a Ford C6 automatic transmission. While these have a lot of tooth contact area, their longevity reqires pressurised oil feed. In the transmission the lubricant is fed out of a hole in the sun gear to the planets and on to the anulus. I understand this has been tried without forced lubrication, resulting in seizure.John EvansThink logically and do things well, think laterally and do things better.

[asra]

Murray You said you pulled apart your 618 at 260 hours, why ?Did seize it, or did you pull it apart to just check it out.If it was just schedualed maintenence, then what was the tolal engine hours during overhaul.Sam.