Another newbie with a couple 'a questions....

JackrabbitSlim · 06-26-2002, 05:38 AM

I'm the proud (read obsessed) new owner of an 85 Cab 911, and a lurker on the board here for a while, but need to finally step up and post a couple of questions.

Has anyone tried any of the airplane aircooled engine oils out there? For example AreoShell or others? A pilot friend of mine has suggested giving them a try....he of course uses them in his planes but also says they are quite a hit with the guys on motorcycles and he uses them in his Harley as well. It is fairly expensive stuff....from what I've been able to find out, on average of twice the price of automotive oil. Anybody with experience with these out there with an opinion?

Lastly, my '85 didn't come with the owners manual and as this is my first p-car, I have loads of questions on really simple topics that could no doubt be answered there...any online sources for buying old manuals? There's not a dealer in 500 miles that I can find, so I think on line is going to be my first place to look.

Thanks in advance for any help, and for all the help you all have been so far while i have been 'lurkin.....Gotta go, the roads callin

beepbeep · 06-26-2002, 05:45 AM

Original Owner manuals:

http://www.pelicanparts.com/catalog/shopcart/911M/por_911M_documt_main.htm

There is no cab-specific manual, but i believe 85' Carrera manual will do.

P.S. In my own opinion, there is nothing wrong with ordinary automotive oils. Given the choice of tried-and-true automotive oil (like "Mobil 1" or such) and some untested aircraft goo that is twice as expensive, i would always go for ordinary one. Is this "miracle-oil" multigrade oil at all?

Bigbartguy · 06-26-2002, 06:01 AM

I'm not sure about the airplane oil BUT I'd also suggest you get a Bentley manual (about $100) for the car also. It will save you countless frustrating hours.

and congrats on the car!

Tim
1985 Targa

Joeaksa · 06-26-2002, 06:17 AM

Jack,

You DO NOT want to use airplane oil on this or any other motor that is not in the air. AeroShell is a very fine oil, used it for years but on something with wings hanging behind me! I am also a licensed aircraft mechanic...

Airplane motors run at much slower speeds, usually under 3000 rpm to keep the prop from going supersonic. They run at a steady constant state with little variance in rpm. The oils are almost always changed at 25 hour limits, and never more than 50 hours.

All of this is completely different than any profile that any driver would have with a 911 and this motor is too expensive to experiment with it. As a previous poster mentioned, Mobil 1 is an excellent oil and there is no real need to go any futher in this area.

If your friends want to experiment with their motorcycles, then let them have fun. I love my BMW bike too much to do this and watch its motor die or be damaged. AeroShell is just not designed for this useage. Its designed for motors that run slow and long and change speeds three or four times every flight, not at every stoplight.

You can often find old owners manuals on Ebay or such. Also just make a list of questions and post it to us on the forum. Many times the real way to fix or figure something out is not in the manual and with the number of people on this forum, one of us has to have hassled with most issues before!

Joe

JackrabbitSlim · 06-26-2002, 06:48 AM

Thanks for the quick replies!! Guess I'll be sticking with the Castrol it's been running with....thanks for the heads-up on aeroshell, Joeaksa...being it is made for aircooled engines, it sure had me thinking, but will steer clear, thanks again.

Going to be ordering a owners manual from Wayne along with a Bentleys and 101 Projects to get me started with all the basics on the car and getting used to what's-what. Didn't even realize they had them in stock here on the site....thanks again..

deltajetfixer · deltajetfixer's Garage

[QUOTE]Originally posted by Joeaksa
[B]Jack,

Airplane motors run at much slower speeds, usually under 3000 rpm to keep the prop from going supersonic. They run at a steady constant state with little variance in rpm. The oils are almost always changed at 25 hour limits, and never more than 50 hours.

Saw a story on the Russian "Bear" (Tu-95) on the Discovery Wings
Channel and they said several times that the beast was (is still) so noisy due to the counter-rotating props EXCEEDING the speed of sound.

Also, isn't Mobil AV1 synthetic oil for reciprocating aircraft engines STC'd for 200 hours?

deltajetfixer · deltajetfixer's Garage

[QUOTE]Originally posted by Joeaksa
[B]Jack,

Airplane motors run at much slower speeds, usually under 3000 rpm to keep the prop from going supersonic. They run at a steady constant state with little variance in rpm. The oils are almost always changed at 25 hour limits, and never more than 50 hours.

Hey Joe,

Saw a story on the Russian "Bear" (Tu-95) on the Discovery Wings
Channel and they said several times that the beast was (is still) so noisy due to the counter-rotating props EXCEEDING the speed of sound.

Also, isn't Mobil AV1 synthetic oil for reciprocating aircraft engines STC'd for 200 hours? It's been years since I've seen it...

Joeaksa · 06-26-2002, 02:28 PM

I have heard that they are pushing out the limits on the syn oils for aircraft motors but not for anyone using dino oils. Our turbines go that long but its a different critter.

Remember the old radial motors during WW2 and they were lucky to last two days without oil changes and 500 hours between overhauls. All in the oils, as the metals have not changed that much since then.

Ever been at the airport and a Cessna 206/7 takes off? Reason its so loud is that the prop tips are actually at or just beyond the speed of sound and making all the racket... pull the rpm's back a bit and its not real loud. They can go at or beyond the speed of sound but not for a long time or pieces start coming off...

Saw the same program... would not want to be pulling props on that puppy! Have parachuted out of a Russian turboprop and thats as close as I want to get to one again!

Joe