70 weight oil for ignition fuel

Can anyone give me a source for 70 weight oil to use with Coleman fuel in an ignition engine. No one here in the Minneapolis area seems to sell it any more.

Thanks,

Jeff W.

Jeff,
Try your local airport. If I remember right maybe aircraft engines use this stuff.

Hello JeffW,

I bought a quart at a local motorcycle shop here in Austin, TX. I called around and several motorcycle shops had it.

good luck!

LAST EDITED ON May-15-04 AT 07:56 PM (CDT)
 
>Jeff,
>Try your local airport. If I remember right maybe aircraft
>engines use this stuff.

This used to be (LONG ago) what was called "motorcycle oil" back when Harleys and Indians (and such) used a total loss oiling system in the mid 1930s. Today, I think only the high performance race dudes use it:

http://www.megapower.com/mottransoils.htm

Jake

LAST EDITED ON May-15-04 AT 08:18 PM (CDT)
 
>>Jeff,
>>Try your local airport. If I remember right maybe aircraft
>>engines use this stuff.
>
>
>This used to be (LONG ago) what was called "motorcycle oil"
>back when Harleys and Indians (and such) used a total loss
>oiling system in the mid 1930s. Today, I think only the high
>performance race dudes use it:
>
>http://www.megapower.com/mottransoils.htm
>
>
>Jake

One of my old employers ran a Jr. Fuelie Dragster, and he gave me a quart of Kendall Nitro 70 weight for my spark ignition engines. I asked our local SAM engine expert about it, who was a Chevron engineer. He said "NOT appropriate". I still have it, unopened. I expect he would say the same about Megapower oil, if he was still alive. I like the smell of gas & oil, but most use alky/castor, I think. Castor is not a good mix with Coleman fuel, tho Blendzall might work. Steve

Bob Z. will probably weigh in here with the mix he has used succesfully for years. I know that he uses all castor in it.

Most of the 70 wt. oils now on the market to my understanding are high detergent, and fowl spark plugs when used in a 2 stroke. Castor will mix with Coleman fuel or pump gas. I generally run 30% castor with either gasoline or methonal. In fact, I sometimes mix glo fuel with gasoline to get my run times right for the tank I'm using. Since I use castor in both, It mixes right up. I use Sig castor.

You know, dumb as this may sound, but I saw some at my local Wal-Mart when I was in there getting oil for my lawn mower.

90 wt and 30 wt oil are both common. I wonder if you could mix a little 30 with 90 to get 70. You will need to do the math to get the correct mixture.

If the oil you use in your fuel mix has detergents in it, then your spark plug will foul. That's why most of the guys are using castor as a lubricant.

I too went through the plug fouling problem with 70 wt oil. I have used a castor blend which will mix with gas called Maxima 927 which I got from a cycle shop. Blendzall is also Ok if you can find it.

Now I run Fox Super fuel in all my spark engines as it seems to run as clean as any of the other formulas I have tried, plus it allows me to fly the models on glow for test purposes. On a properly set up engine you cannot tell the difference in flight.

I've had many discussions with the "experts" on the gas/oil subject. Also I've tried many brands of 70wt. oil and many types of "gasoline". This is what works best for most:

George Aldrich used to slip across the border into Mexico and buy "tractor gasoline", which had no additives. George also recommended "CASTROL 70 motorcycle oil". I bought a case of the oil from George, and it is the only oil which would not burn and turn black in a high-compression and high temperature motor like the Orwick 64. Remember, if your exhaust is dark or nearly black, the oil is burning, and doesn't provide good lube. Exhaust oil should look just like the oil that was mixed with the gasoline. For low compression engines like Brown, O&R, the usual Harley Davidson "Nitro 70" oil is OK. My SAM friends report that Sal Taibi uses VALVOLINE 70, which, if OK with Sal, seems worth trying.

I have used low-lead pump gasoline and also Coleman lantern fuel (napha). I really can't tell any difference.
some people say that Coleman fuel runs hotter than gasoline. I can't verify that, although it has been reported that naptha has a low octane rating (whatever that would do to a model engine). As far as spark plug fouling on pump gasoline, I haven't used it enough to notice any spark plug problems.

On gas/oil mix. The general rule is a 3:1 mix. But for older motors with lapped pistons, a heavier oil content is recommended. Seems to me, as long as you end up with lots of oil and goop in the plane, you have enough oil.

I have been running spark motors since 1944. If any combination of gas/oil brands were really bad, I would give everyone fair warning.

LAST EDITED ON May-16-04 AT 09:03 PM (CDT)
 
That is the way I done heared it from GMA too. He once said that he strongly felt the reason he saw so many of the "old" spark ignition motors in such good shape was due to the 70wt oil/gasoline mix which gave superior lubrication at a lower running temperature.
I remember MANY years gone when I used to go with my father or grandfather to a local service station (really was in those days) and we'd get a gallon or two of "white gasoline" from the storage tank they had out behind the shop. Usually went to Texaco...

Jake