Can I use Mobil 1 oil?

[bret]

Just read an interesting Ave web article from 1995 about the lawsuit that came about from its inability of this synthetic oil to scavenge the lead out of aircraft engines, which eventually caused oil control ring fouling and prop hub sludge buildup and engine lube related wear ect. My question goes out to folks that are burning auto unleaded fuel, are you still using ash less disbursement oil? I plan on experimenting with auto fuel in my full Dual EFII setup. The only drawbacks that I found with the synthetic oil was that it is so slippery with its long chain molecules is that it will not hold onto the lead from blow by and it will cause sludge, but what if there is no lead? On a different note, I have been doing an unofficial test with this Mobile 1 15/50 Oil in the Nitrous Ducati, four riding season and 30 K on the odometer, I have ran 60 LBS of NOS through this engine, many runs at full load and 10,000 RPM upshifts with no engine, clutch or transmission problems, and does not burn any oil between 5K oil changes. Mobil 1 appears to be a good lubricant because Ducati is not know for its reliability ;-) here is the article http://www.avweb.com/news/news/182891-1.html

[Mel]

How do you intend to fly cross country without, at some time or another, using leaded fuel. I wouldn't chance it.
There are several synthetic blends that get along fine with lead.

[bret]

Cross County? never thought of that? but Back to the root problem, folks were told they (could go) 200 hrs before an oil change, I'm sure some tried this and may have been part of the original problem, then there is the leaning ability, with (fully atomized) fuel, from EFII injectors, there will be better leaning ability with less unburned fuel available to get past the rings, and with the ASA crankcase evac system, there should be even less contaminates in the oil. Just think back 20 - 30 years, were the average spam can drivers running lean of peek? I was not, (what's an EGT? ya got 4 ? )

[Mel]

A lot of aircraft engines were ruined, some with inflight failures caused by running Mobile 1.
You're free to run anything you like.

[6 Gun]

lots of discussion about this in search I think you should try and see how it works out











Not just kidding
Bob

[SMO]

You would probably find this webinar interesting

http://eaavideo.org/video.aspx?v=1149666747001

[mike newall]

If we are talking about Lycoming engines think this.

They were designed over 70 years ago as basic agricultural and pumping engines. They were quickly developed into aero engines because they could deliver the horsepower at lower rpm suitable to our prop speeds - big capacity, low revving.

They are dinosaurs. They are mega old technology and sometimes things need to stay a bit relaxed and old fashioned.

Personally, the best thing I do to my Lycosaur is feed it new Shell or Total or Phillips 20/50 multigrade every 25 hours or so.

The oil is cheap, the change takes moments, the motor goes...... Gee thanks

If your are flying an RV12 with a Rotax, follow the new path of modern oils etc. If you are on a Lycoming, stay with the old stuff.

My Toyota Hilux (Tacoma) has a 3.0 diesel motor and I do run Mobil 1. Have for 20 years through Mercedes, Volvo, Mercedes and now Toyota.

Hundreds of thousands of miles, no problem. Mobil 1 is a fine oil for modern motors, not for museum pieces

[Bavafa]

Originally Posted by bret

folks were told they (could go) 200 hrs before an oil change

I would like to meet the person that is willing to go 200 hours without taking the cowl off and looking at the engine. And if you are taking the cowl off, why not just change the oil since the hard part is already done

[BillL]

This would be a good topic to discuss with the aero Shell oil guys - full synthetic. They have the test results and know what to look for. Surely they are involved with the non-leaded replacement fuels testing. This approach might offer an improvement in friction and wear characteristics with lower risks. If it were automotive, you would have to dig deep to make that expert contact. I suspect at OSH you could get to that person pretty quickly, aero is a much smaller world, and structured differently.

Alternatively, you could use oil analyses to extend the oil life of standard oils when using (mostly) unleaded.

BTW: Will angle valve engines burn auto fuels w/o detonation?

[bret]

ok, please read first post, we all know lead is bad for none dispersant oil, my question is about synthetic oil use with Unleaded fuel. We know the main problem with auto fuel is its low vapor pressure. with EFII a large percent of fuel is being circulated back to tank so the vapor lock problem is greatly reduced. OK, Flame Jacket....ON