Engine oil

[DesertFox4]

Aero Shell Sport Plus 4. Made for the Rotax/gearbox.

Before Aero Shell Sport Plus 4 appeared on the market I used Honda Pro oil available at any Honda motorcycle shop. Worked well for many hundreds of hours.

[Esser]

Mobil 1. But I'm switching to Mobil 1 Racing 4T which is a motorcycle racing oil with more wear additives for the gear box. Larry pointed me in that direction.

[Dusty]

Is there different levels of wear additive ?
The reason I ask is ,I was warned not to use additives an account of the sprag clutch
I am using ELF oil, as it is supposedly better for lead scavenging

[Esser]

Typically for wet clutches you don’t want anti friction additives but with the Rotax clutch it’s not like a motor cycle here the plates are opening and closing. Either way, 4T is a motorcycle oil so it accounts for wet clutches. The racing has more anti wear additives for the gear box etc. You can use the racing oil on a vehicle with a catalytic converter. But planes, you’re good.

[jrevens]

Aero Shell Sport Plus 4. Like Steve said, it’s designed specifically for the Rotax, and I’ve had excellent experience with Aero Shell oil in the past.

[Av8r3400]

As Josh said, I run the Mobil 1 Racing 4T, 10W-40. I have since I got my first 912 years ago. I am fortunate in that I can get uncontaminated auto gas in my area, which is what I run.

If you run 100LL more than on a rare occasion, you should run the Sport +4 or another mineral motorcycle oil. Full synthetics and lead don't live well together and will leave lead deposits in the crank case and gear box, even with the use of Decalin.

[Slyfox]

I run real auto fuel and amzoil motorcycle oil. if I know I'm going to use 100LL I switch to the rotax recommended oil. Aeroshell sport.

[Wheels]

I go with the Rotax Recommended Aeroshell sport 4.

[Ronin]

On the Europa company planes we always used Golden Spectro semi-synthetic. We almost always used 100LL and the synthetic/dinosaur mix was good for scavenging the lead. We also ran TCP in the fuel. Always had lead streaks from the exhaust and a large pile in the bottom of the oil tank at oil changes. This was the recommended oil from a guy that worked for Kodiak years ago. Will be the oil I use again when the time comes.