MMO is not approved. If you even think about it during flight, your aeroplane will fall out of the sky. That's why many of us carry a bottle, available at Wal Mart!
TCP is a lead scavenger. The 100LL we're using has too much lead in it compared to the amount of lead in the old 80. You don't need lead in the fuel it doesn't "lubricate" anything. When TCP is available, use it because if it ain't broke now, it will be later. Ideally if you could find mogas without all the crap in it, about a 50/50 blend with 100LL is nice. Al Visit the Ercoupe Swap Page Free, Easy and No Membership Required http://www.ercoupeowners.com/swap/swapbook.htm ----- Original Message ----- From: bbartsey To: [email protected] Sent: Sunday, March 29, 2009 9:50 AM Subject: [ercoupe-tech] Marvel Mystery Oil OK. Now I'm confused. For years since circa (Latin for approximate time) 1978 I have been told by people who should know, that Marvel Mystery Oil was approved for use in aircraft oil and gas. Now I'm hearing it's not so. Also recently read an article in Flying Magazine, I think, written by a gal who is an retired Fed that she always carried a can of it around in her airplane wherever she went. I think her last name was Lunkin, as in "Sunkin Lunkin". (An airport near Cincinnati). So which is it? I use a little of it peiodically in the fuel and oil and notice that there were little or no lead deposits on the plugs at the last annual (77 hrs on engine for the year)and that those little pesky rust spots at the top of the oil dip stick, disappeared. I also bought some TCP (the legal stuff) but haven't used it yet under the philosophy of "If it ain't broke, don't fix it". So, just what is wrong with using Marvel Mystery Oil? Bart
