Gang, I also truly suspect, although it saddens me to know it's true, that no matter how good auto gas could be, Continental would never condone it's use. There is a serious legal implication involved here. If they say auto gas is OK, and then an engine fails, there could be much liability on their part. It will never happen that they will say use it. I've never heard anyone who's used it say they've had any problems. The only ones who say it's bad, are the ones who don't use it. Really leaves me wondering.
Larry David wrote: > When your mechanic appends to his "what you should do" things like put > Marvel Mystery Oil in your engine, I would doubt all that he said. After > all, Marvel may work (and some of us use it on occasion), but it is an > unproved product. You might also look at the date on the TCM manual and > consider whether they are comparing autogas with (now unavailable) 80 or > 100LL. There is too much lore in this area to make a decision based on > one mechanic's OPINION. > > There probably is a problem with some seals and hose materials if not > designed for autogas. If you don't get these problems sorted out, then > you'll have lots of problems with the new 82UL that we will be buying > soon. What I've read is that it is much closer in formulation to > autofuel than 100LL. > > I use 100LL because autogas is not available at our field. I add TCP (an > authorized additive) to scavenge the lead in order to avoid valve > sticking problems. > > David > N6359V > > [EMAIL PROTECTED] wrote: > > > > With the recent postings on using auto gas in your Ercoupe, I've become > > a little concerned. So, I stopped by a neighboring airport, whose A&P I > > have a lot of confidence in, and posed the question to him. His advise > > was don't use it. He said auto fuel was okay years ago when it had lead > > and didn't have all the addatives. He pulled out Continental's manual > > and showed me what Continental says about car gas: > > "USE OF AUTOMOTIVE FUEL IN TCM AIRCRAFT ENGINES" > > > > TCM does not recommend or authorize the use of automotive fuels in any > > of their aircraft engines. The engine warranty and pro rata policy will > > be voided if such fuels are utilized. Fuels must conform to ASTM-D910 > > or MIL-G5572E, if satisfactory engine service life is anticipated. > > > > Automotive fuels can contain additives that act as corrosive agents, > > formulate gum deposits and, therefore, increase combustion chamber > > deposits. Continued operation on automotive fuel can lead to > > detonation, pre-ignition and sticking or eroded valves. > > > > The vapor pressure of automotive fuels exceeds that allowable for > > aviation fuels. This increased vapor pressure increases the tendency to > > vapor lock at higher altitudes. A vapor lock condition can cause > > complete power loss. > > > > The use of any fuel that not conform to the above specifications may > > cause cylinder assembly, valve, piston and/or piston ring > > damage/failure. > > > > The mechanic also mentioned the deterioration of o-rings, gaskets, etc. > > He suggested using 100LL and adding either AV Blend or Marvel Mystery > > Oil to the fuel. I've only burned about two tanks full of auto gas, so > > I guess I'll drain what's in it, fill it with 100LL and add some AV > > Blend. Looks like I wasted money on the auto gas STC. He says the > > ideal to burn would be 80 octain av gas. > > > > EBaumgardner N87172. > > __________________________________________________________________________ ______ > > To unsubscribe from this list please send mailto:[EMAIL PROTECTED] > > ___________________________________________________________ > > T O P I C A The Email You Want. http://www.topica.com/t/16 > > Newsletters, Tips and Discussions on Your Favorite Topics > __________________________________________________________________________ ______ > To unsubscribe from this list please send mailto:[EMAIL PROTECTED] > ___________________________________________________________ > T O P I C A The Email You Want. http://www.topica.com/t/16 > Newsletters, Tips and Discussions on Your Favorite Topics __________________________________________________________________________ ______ To unsubscribe from this list please send mailto:[EMAIL PROTECTED] ___________________________________________________________ T O P I C A The Email You Want. http://www.topica.com/t/16 Newsletters, Tips and Discussions on Your Favorite Topics
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