Engine oil

[Flyboy66]

What oil is everyone using in their Rotax engines, and why?

Thanks,

Steve

[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.

[Wheels]

I go with the Rotax Recommended Aeroshell sport 4.