Fuel in oil

by Keith Wall in 912 / 914 Technical Questions 6 years ago

I have a Aircam. 2 rotax 912. 7 months old with 100 hours. I just did my 2nd oil change. This time I requested an oil analysis. Both engines had fuel contamination. 5.8%. Viscosity was reduced. I don’t have fuel cutoffs. High wing tanks, gasolator, primer, electric fuel pumps which are only ran at start up.
Engines start and run great. No choke.
Any thoughts on what’s happening?

Re: Fuel in oil

by Roger Lee » 6 years ago

Roger Lee

126 5.13k 4.55k

What fuel are you using?

Roger Lee
LSRM-A & Rotax Instructor & Rotax IRC
Tucson, AZ Ryan Airfield (KRYN)
520-349-7056 Cell

Report
Re: Fuel in oil

by Keith Wall » 6 years ago

Keith Wall

10 16 28

91 octane auto fuel, no ethanol.

Report
Re: Fuel in oil

by Roger Lee » 6 years ago

Roger Lee

126 5.13k 4.55k

That's what I thought. My guess is you got some diesel fuel in with the gas at the station. Usually happens when the tank truck driver doesn't flush his hose. You'd never notice in a car and most never notice in our 912, but some times it seeps or contaminates the oil and the oil level in the tank actually rises and like you if you have it tested it shows fuel in the oil. Since most people never know it just gets burned through the system in the regular gas or drained during the oil change. If you want you can just do an oil change.

p.s.
Nothing to prevent it from happening again.

Roger Lee
LSRM-A & Rotax Instructor & Rotax IRC
Tucson, AZ Ryan Airfield (KRYN)
520-349-7056 Cell

Report

You do not have permissions to reply to this topic.

Title	Category	Replies
Leading edge airfoils is sold	General Tech Discussion	6
Oil Pressure Relief Valve	912 / 914 Technical Questions	9
Fuel PSI sensor relocation hose	912 / 914 Technical Questions	2
fuel pump light	915iS Technical Questions	0
How to Remove Outlet Line from Turbo Oil Sump	912 / 914 Technical Questions	2

Fuel in oil

Recent Videos

Safety First!

ROTALK News

Prize Giveaway!

Log In/Out

Login