2 Stroke Oil Question

[dozerash]

I have a 05 GasGas EC250 and a 03 KTM 300EXC, I was using Motorex Racing Power 2T fully synthetic mixing oil. I went to buy more and they apparently discontinued that type, so I bought Motorex Cross Power 2T fully synthetic. The Racing power is brown and the Cross power is red. What I would like to know is can I mix the two since I almost have a full tank of the older stuff and just mixed the new stuff in the gas can. I have an Enduro coming up or I would just run the tank down and empty it then add the new stuff. Any help would be appreciated.
Ash

[Brian VT]

I was told that the different Amsoil synthetics are compatible with each other and have mixed them (Dominator and Interceptor) with no problems .
Sorry, I don't have any info on the Motorex but it stands to my reasoning that the same principle may apply ?

[PEB]

I have mixed nearly every imaginable oil combo together never had a problem.

[gasIdaho]

Ditto. I mix 80% Maxima Super M with 20% Castor 927. Smells so good. No problemo.

[iajim]

Bel Ray oil says not to mix their oil with other brands. I don't know if it's a 'Bel Ray company line' or if there are real problems. Most other oils seem to mix just fine.

[Wicitup]

If you have any doubt about mixing them I would drain one bike and use the gas left over in the other bike and start over. How much gas could you loose? Drain both of them and run the left over gas in your weed waker. I run and always will run golden spectro oil and have mixed just about every kind. Ask your self this question, Your 20 miles from the truck and you run out of gas but your ridding buddy has enough to give you some are you going to not take it? Hell no your going to take it and ride back to the truck where there is Ice cold beer waiting for you. I have never heard of any problem mixing oils. Know drink that beer and forget about it.

Keep the rubber side down.
Lee

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George Orwell

[Jim Cook]

Just don't mix castor bean based oils with petroleum based oils (most synthetics are compatible with pertroleum oils).

[slocalspode]

Jim wrote: Just don't mix castor bean based oils with petroleum
based oils (most synthetics are compatible with pertroleum oils).
----
Hi Jim.
Say you have been running synthetic or petrolium oils in your
bike for years. And decide to try a tank, or three, of bean oil
mixed 45:1 and a 50/50 mix with VP4.2 and premium.
What is the chance of that bean oil causing a guming problems
in the crank main and rod bearings from the residual oil left in
there?
just curious of what you think, as I seem to know the answer,
at least so far......Still runs good...so far....
Jeff So. Cal.

[Nick]

I've mixed Castrol R with every imaginable oil there is with no problems.

[Jim Cook]

Originally Posted by slocalspode

Jim wrote: Just don't mix castor bean based oils with petroleum
based oils (most synthetics are compatible with pertroleum oils).
----
Hi Jim.
Say you have been running synthetic or petrolium oils in your
bike for years. And decide to try a tank, or three, of bean oil
mixed 45:1 and a 50/50 mix with VP4.2 and premium.
What is the chance of that bean oil causing a guming problems
in the crank main and rod bearings from the residual oil left in
there?
just curious of what you think, as I seem to know the answer,
at least so far......Still runs good...so far....
Jeff So. Cal.

Hi Jeff,
The problems that we had would manifest themselves as a "coagulated gel" in the fuel tank or carburetor, when someone would change from bean oil to petroleum oil without getting all the fuel out of the tank or the float bowl of the carb. The left over bean oil premix would gel exactly like adding soap to gasoline, and block the carb's passages. (I'm not speaking of the more expensive highly refined bean based oil which uses the esters of castor and synthetics blended together; but rather, just plain old castor bean based premix oil.) It didn't gel the whole tank's load; just a small amount proportionate to the amount of left over fuel.

Even if some of the stuff coagulated down around your crank bearings, it wouldn't cause a problem, as it would still retain it's lubrication properties and protect your bearings.