National Aeronca Association Bulletin Board

I am about to start flying my Sedan with the original C-145 Continental on it. All the responses that I see here are from C-85 drivers. I am a big believer in MMO. But I would like to know just how much I should add to 100LL. I dont intend to use Auto gas despite the high cost of 100LL in AK.

Dik Holder, N1441H, Queen of the Berry Patch.

Dik,

Most people just put a couple of "glug's" into the tank then refill it immediately.

Worked for me for years!

Joe A

The container and the website suggest:

How much Marvel Mystery Oil® (MMO) do I put in my gasoline tank?
Marvel recommends using 4oz of MMO for every 10 gallons of gasoline.

I had a C170B with an O-300B and had very good results, no stuck valves, using TCP. Also put half a pint of MMO
in the oil about an hour before oil change to help keep the engine clean. Had oil sump problem once and it is really
tough getting it fixed or replaced so started using MMO before an oil change.

Do the same now with my 7DC - Sometimes MMO or sometimes TCP in fuel and MMO before oil changes.

thanks Steve. Since 4 ounces per 10 gals seems a little more guessproof than glugs, I may try that. I already put MMO in my Oil before turning the engine over the first times. That was recommended to me by an old friend who had been an A@P for decades. Since I am still using aeroshell, there is some carbon in my engine and that should help. With 18 gallon tanks that should work out to 6 or 7 ounces per side.

Dik Holder, N1441H, Queen of the Berry Patch

Nothing to do with MM but I've pulled a couple of oil tanks that have been in service for a number of years and found a lot of sludge around the pickup tube. Could be because they only got a 'once a year at annual changes' and/or not getting up to temperature enough to boil the moisture out. Just an observation.
Mike

Texas DFW area

Granbury 100LL Granbury Regional, Airport has rental cars courtesy


Services week days only

Will call Brink Nassau Bay AP pvt Field 2000 ft grass strip.

817-894-1815

I only use Avgas and add MMO 8 oz to 10 gal, C-75-12 never an issue oil changes every 20 hours.only non detergent oil.