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Old 11-10-2011, 06:29 AM   #16
Kurt V
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I have an Airhead, but I also have an older Porsche 911, which as you know is also a horizontally opposed, air cooled engine. There is a thread on a 911 board that I frequent that is solely dedicated to finding oil that has the proper level of ZDDP content. If you want to read all 88 pages, here is the link: http://forums.pelicanparts.com/porsc...4-sm-oils.html

If you just want the list of oil brands, here they are:

Brad Penn Racing Oils (same as the old Kendall from the '70s);
SWEPCO 306;
Redline;
Royal Purple;
Castrol GTX High Mileage; and
Mobil 1 V-Twin MC 20w-50.
Mobil 1 MX4T 10w40
Royal Purple Max Cycle 20w50
Amsoil m/c Harley V-twin 20w50
Castrol Syntec "Classic" 20w50
Valvoline VR-1 20W-50 -it is marked "Non-Street Legal".
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Old 11-10-2011, 06:35 AM   #17
samthg
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good post for me to find right now, since i just picked up a '78 r100s. I was thinking I better go with a 20-50 dino oil and stay away from the synthetics.

Hey, by the way, any "perfect" tires of choice?
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Old 11-10-2011, 08:30 AM   #18
_cy_
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Quote:
Originally Posted by samthg View Post
good post for me to find right now, since i just picked up a '78 r100s. I was thinking I better go with a 20-50 dino oil and stay away from the synthetics.

Hey, by the way, any "perfect" tires of choice?
just went thru the same which tire questions ... here's an extensive discussion on that topic. http://www.advrider.com/forums/showt...730033&page=21
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Old 11-10-2011, 08:45 AM   #19
caponerd
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Quote:
Originally Posted by photomd View Post
Autozone in my area now has Castrol 20w50 for bikes...$4.99/quart. It's SG, availible locally and 1/2 the price of BMW oil. It's about 2/3 what I can find Spectro.
Autozone often has this on sale at about $2.50 a quart.
I've heard that it's the original formulation of Castrol GTX, with the zinc still in it.
Last time I found it on sale, I bought out their supply. They also have it in 10/40.

BTW, I read something in one of the many oil threads that was written by a guy who claimed to be an engineer at one of the oil companies, who said that all the major oil brands have long since found a suitable replacement for the zinc that's been removed from most modern oils, and that the whole "you'll wear out your cam lobes using modern oil" thing is a myth.
Better safe than sorry, and if I can get oil with zinc in it on sale for the same price as standard Castrol GTX, I'll do it.

I guess this begs the question; why would Castrol bother to make a motorcycle-specific version of GTX that has zinc in it?
Perhaps because people think they need it, and if they can sell it for twice the price of their standard product, they'll be happy to do so.
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Old 11-10-2011, 08:52 AM   #20
coastranger
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been running castrol 20w50 for years. I change oil often, esp on the bikes

I know its been said before about syn's leaking and I have seen it first hand on my bikes. However if everything is newish and rebuilt I will run synthetic, example my tranny was recently rebuilt and after the first few k and many oil changes to flush and check, my tranny now runs syn.

My son recently put Amsoil in his wifes hi mile quad ( dirt/sand bike) puked it all out in almost a day. I think any syn would have leaked out like that, he just happened to use amsoil as he sells it also at his wewb site ( his specialty is high horse dodge diesels)
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Old 11-10-2011, 09:19 AM   #21
Airhead Wrangler
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Quote:
Originally Posted by caponerd View Post
I guess this begs the question; why would Castrol bother to make a motorcycle-specific version of GTX that has zinc in it?
Perhaps because people think they need it, and if they can sell it for twice the price of their standard product, they'll be happy to do so.
The motorcycle specific oils have additives in them to prevent wet clutches from slipping. Some car oils will cause wet clutches to slip like a mofo, some won't. It's kind of a crap shoot. Motorcycle specific oils will never allow that to happen though (at least they shouldn't). These qualities are totally irrelevant for our application of course, but the added ZDDP couldn't hurt.

Quote:
Originally Posted by coastranger View Post
been running castrol 20w50 for years. I change oil often, esp on the bikes
I'm of the opinion that what oil you use (as long as it's semi-decent) is not nearly as important as how often you change it. I've met too many world travelers with multiple hundreds of thousands of miles on the original untouched bottom end who have to use whatever oil is available where they are. They change it often, but you can't buy royal purple golden spectro super synthetic bla bla bla in rural Bolivia. They just use whatever they can find and their bikes just keep on going. That's a good enough argument for me. I just use castrol GTX 20W-50 and change it every 3000.
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Airhead Wrangler screwed with this post 11-10-2011 at 09:30 AM
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Old 11-10-2011, 09:34 AM   #22
adventure950
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I still use BMW High power oil ACEA ;A2 API ;SG SAE 20 / 50 : PART NR 81 22 9 407 685 also has another number on the bottle 220709GS 788297G this is the non synthetic oil supplied for BMW motorcycle air heads and oil heads for years manufactured exclusively for BMW AG Munich.Has all the additives and spec (SG) for airheads its also not so expensive I buy a 12 litre case each time and pay 7.00 Litre. BMW were thinking of dropping the oil from list as not enough people buy it - but it was still listed in March when I bought my last case - but if more did buy it then they would keep producing it I suppose.
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Old 11-10-2011, 09:50 AM   #23
Bill Harris
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OMG, this is turning into a full-blown oil thread.

{sigh}, it's Winter?

I like Avon Roadriders, BTW...

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Old 11-10-2011, 10:01 AM   #24
H96669
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Ah the slippery subject, I live in a cabin....always good for "Cabin fever".

Castrol GTX 20w50, never ever had an oil related problem in near 40 years of using Castrol products. Always saved my used BMW oil and dumped it in my oil burning junkers....never ever had a problem with that, the 83 Toyota just got an oil change that way, overdue after 10 years and 500 Kms of bushwacking.

More used 3,000 miles BMW oil.....I just make wood stain with it, beautiful on cedar around the cabin.

Seriously considering switching to Rotella, JASO specs. If any problems with that I may find out early,will be cheaper, all my bikes have oil pressure gauges.
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Old 11-10-2011, 10:03 AM   #25
photomd
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Quote:
Originally Posted by Bill Harris View Post
I like Avon Roadriders, BTW...

Yeah...me too...



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Old 11-10-2011, 10:45 AM   #26
jackd
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Quote:
Originally Posted by Bill Harris View Post
OMG, this is turning into a full-blown oil thread.

{sigh}, it's Winter?

I like Avon Roadriders, BTW...

What the hell! I use Spectro 4, Avon Gripsters and a Harmonizer for balancing carbs....
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Old 11-10-2011, 11:03 AM   #27
Bill Harris
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As long as we are obsessing...

NGK BP6ES.

GL4 or GL5 gear oil?
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Old 11-10-2011, 11:27 AM   #28
jackd
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The same NGK's and GL-5 for me.
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Old 11-10-2011, 01:59 PM   #29
jimbee
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Quote:
Originally Posted by jackd View Post
What the hell! I use Spectro 4, Avon Gripsters and a Harmonizer for balancing carbs....
nearly spay out my drink!! hhahhahahahaha
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Old 11-10-2011, 02:05 PM   #30
lockyv7
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Oil for a R100GS , pretty much anything you can grab from the corner shop.
locky.
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