Two Stroke Premix Suitable Oil For Rotax?

[jackc]

I have searched the Forums, but found no answer?

so I am now looking for a suitable full synthetic oil to use in the Rotax 618 that I have just acquired.

In looking at Penrite  MC-2ST Full Synthetic Two Stroke Oil.

it has a note in the specifications, as being unsuitable for ultralight aircraft 

So now looking for a suggested alternative?

 

Edited Friday at 11:45 PM by jackc
Added word

[facthunter]

Don't use any TCW3 type oil . Its ONLY for Outboards. ONE USA company certified it's oil for Aviation. Pennsoil  I think. It's a few years back. I used Valvoline Racing 2 stroke like many others, did. Nev

[facthunter]

Perhaps their formula has changed. ( More mixant?) Makes it seem thinner in the bottle.  Nev

[turboplanner]

Here's an idea; what about asking Rotax for the correct specification.

[jackc]

I was just looking for a quick answer on a weekend so I could do my research and buy what I needed Monday in the local area

[skippydiesel]

 Rotax Owners Forum https://www.rotax-owner.com/en/rotax-forum will have all the answers.

 

".........note in the specifications, as being unsuitable for ultralight aircraft"

 

Cant comment on the suitabity of "Penrite  MC-2ST Full Synthetic Two Stroke Oil"  however this sort of comment is often applied to products, where the manufacturer is seeking to avoid/minimise liability,should their product be implicated in an aircraft incident eg Facet Fuel pumps, widely used by the light aircraft fraternity, explicitly warns against aircraft installation/use.😈

[T510]

https://legacy.rotaxowner.com/si_tb_info/serviceinfo/si-2st-008.pdf

 

Suitable oils listed in the above document

[jackc]

9 minutes ago, T510 said:

https://legacy.rotaxowner.com/si_tb_info/serviceinfo/si-2st-008.pdf

 

Suitable oils listed in the above document

Thanks, the Castrol Oils are easily available.

i had picked this as a possible?

 

https://autobarn.com.au/ab/Autobarn-Category/Shop-our-Full-Range-by-Brand-at-Autobarn/Penrite/Penrite-Hi-Per-2-Stroke-Semi-Synthetic-Engine-Oil-2-5L/p/OA00261

[facthunter]

Oils in specific countries have varying formula's. Autobarn have a lot of brands but if you say it's for an aeroplane they might clam up. Note the date of the Rotax advice  April 2009.. Some of those recommendations may have been superseded . You can call Penrite on the Phone. I've found them very helpful with Lube enquiries.  They used to make a product called "Green Slime" But got sued. It required careful mixing.   Aero engines operate different to most other applications. They don't get much of a rest. and they are full bore at the beginning. Your biggest worry is carbon build up in the ring grooves and the cold motor fuel washing the oil from the Internals as the fuel is not vapourised. Note also 100 L L is OK and with premix fuel remaining in the carbs will evaporate and leave neat oil  which can cause lean running next time. Nev

[turboplanner]

Aero engines are constant power demand (You might sit on cruise power for hours), Motor Bikes are intermittent demand, cruise is usually a long way back from max, even jetskis and skidoos are intyermittent power. So different heat input.  You can email the Manufacturer's service department and most will email back the correct material within an hour or so.

[facthunter]

Rotax are getting out of 2 strokes for Planes. I lot of the reliability is in the hands of the Operator. When they were more universal, I've seen some engines I wouldn't run as a Lawnmower,, still being flown. Little compression and rattly when pulled over. Now they are pretty RARE and there's not a lot of Real Knowledge about them. Even your off road trail BIKES NEED REGULAR SERVICING to ensure a trouble free ride.   I've never had a 2 stroke even falter but I'm Very careful WHOSE planes I will fly.  I will fly something a bit suss ( do a test) if there's Paddocks all around and no trees to have to climb over. Nev

[facthunter]

Can you confirm what Model Your Rotax is? Nev

[jackc]

Rotax 618 with 99 hours TT in an X-Air Standard 

[BrendAn]

1 hour ago, jackc said:

Rotax 618 with 99 hours TT in an X-Air Standard 

I use amsoil Interceptor. Full synthetic. It was the most highly recommended oil I could find in all the American forums.

[BrendAn]

[BrendAn]

10 hours ago, jackc said:

I have searched the Forums, but found no answer?

so I am now looking for a suitable full synthetic oil to use in the Rotax 618 that I have just acquired.

In looking at Penrite  MC-2ST Full Synthetic Two Stroke Oil.

it has a note in the specifications, as being unsuitable for ultralight aircraft 

So now looking for a suggested alternative?

 

Notes about not being suitable for aircraft are just arse covering same as most ultralight stuff.

[Student Pilot]

Used to use chain saw 2 stroke, upped the rate to 35/40 depending on plug chop from cruise. That's from a long time ago. Used in Robyn 440, Rotax's 447, 503 and 582. Memory could be unreliable 😄

Edited 16 hours ago by Student Pilot

[Cosmick]

[Blueadventures]

21 hours ago, jackc said:

Thanks, the Castrol Oils are easily available.

i had picked this as a possible?

 

https://autobarn.com.au/ab/Autobarn-Category/Shop-our-Full-Range-by-Brand-at-Autobarn/Penrite/Penrite-Hi-Per-2-Stroke-Semi-Synthetic-Engine-Oil-2-5L/p/OA00261

Auto store or motorcycle store.

[facthunter]

Do you have the Original muffler and oil bottle for the Disc valve drive ? Use the same oil there as in the premix . GL6 in the redrive is no longer available. Might need an additive. Nearly 74 HP output. Nev

[BrendAn]

18 hours ago, facthunter said:

Rotax are getting out of 2 strokes for Planes. I lot of the reliability is in the hands of the Operator. When they were more universal, I've seen some engines I wouldn't run as a Lawnmower,, still being flown. Little compression and rattly when pulled over. Now they are pretty RARE and there's not a lot of Real Knowledge about them. Even your off road trail BIKES NEED REGULAR SERVICING to ensure a trouble free ride.   I've never had a 2 stroke even falter but I'm Very careful WHOSE planes I will fly.  I will fly something a bit suss ( do a test) if there's Paddocks all around and no trees to have to climb over. Nev

There are thousands of Rotax 2 smokes in service still.

[BrendAn]

2 hours ago, facthunter said:

Do you have the Original muffler and oil bottle for the Disc valve drive ? Use the same oil there as in the premix . GL6 in the redrive is no longer available. Might need an additive. Nearly 74 HP output. Nev

How would he not have the oil reservoir for the rotary valve. Wouldn't go for long without it 😁

[BrendAn]

Has it still got the oil injection jac

[BrendAn]

Rave valves can carbon up and cause erratic running. That's. Another reason to use the best synthetic you can . Which is amsoil from everything I have read.

[facthunter]

Check the Crank Oils seals also if the Motor has been sitting or a long time since manufactured. Correct Mixture is critical.  Nev