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Maxima Castor 927 Motor Oil

Maxima Castor 927 is an advanced ashless formula that blends special castor base with exotic ester synthetics providing the ultimate racing 2T engine oil. Biodegradable formula is fortified with clean burning additives to reduce power valve maintenance, prevents rust and oxidation, eliminates ring sticking and reduces carbon build-up. Generate more horsepower with improved ring seal and significantly lower friction. Premix only. 

Recommended premix ratio:

50-80cc (24-32:1) / 125cc (24-40:1) / 250cc (24-40:1) / 500cc and up (32-60:1)


  • Ultimate lubricant for 2-cycle racing engines
  • The most biodegradable 2-cycle oil available
  • New additive keeps power valves and rings even cleaner

Note: Pre-mix only, not for injection systems.

4.9 / 5.0
17 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
Bang for the Buck
5.0 / 5
Would Purchase Again
5.0 / 5
5.0 / 5
Would you recommend?
Yes (1)
just like Mom used to use
30 years ago we had to come up with our own concoctions of racing oils. mixtures of synthetic and castor based oils. some worked better for crank life, some for piston/ring/PV life. Now, with Castor 927, the mixing, stirring, shaking to get it to mix is gone. Put it in your gas, at the recommended ratios for YOUR engine or the one your builder tells you to run. Its great stuff!, Parts last longer, Engine starts without issues, No fouling. It is castor based and I treat it as such, mix well and again, when you top up the tank

PROS: Smells Like Victory, Mixes well, Proper 2stroke Smell, Covers 2nd Place Helmets, Shaken Not Stirred

CONS: They Never Proved It

November 29, 2015
Old School smell with modern lubrication
The lubrication is at least as good as anything else I've used, and it smells great! I get a lot of comments about the bean-oil smell. Old guys love it, they say it brings back memories. Young guys want to know what that weird smell is.

PROS: Great smell, Super Lubrication

CONS: Haven't found a negative

August 21, 2013
Clean n' Mean
Add it to shell 93 octane at a 40:1 ratio

PROS: Oil Two Stroke

BEST USES: Ktm 85 Sc, Two Stroke
November 14, 2013
Castor 927 blows away Klotz
This 2 stroke mix is by far the best out there. I've used Klotz TechniPlate in the past and the amount of deposit were just through the roof. Switch to Castor 927 and i could easily go 6 times longer between rebuilds.

PROS: Much Less Deposit, Burns Cleaner

CONS: Separates At Low Temp

November 14, 2013
Best 2 stroke MIX by far...
I have used this same Oil since 1991. My motors run great and when i do a top end I dont even have to do the powervalves. 40.1 is the best formula.

PROS: Little Carbon Build Up, Does Not Gum Up Power Val, Smells Great

January 14, 2014
Great Oil
I contacted Maxima before using this oil in my speedway bike. I have been using it for four years now without any failure. Drains well too.

PROS: Mixes Great With Methanol

July 8, 2015
It's the ONLY oil I will use.
Been using this in my son's bikes for years. He was on a 2009 KX85 for 2 seasons and is currently on a 2015 KX100. We have NEVER fouled a plug or lost and engine. He races Hare scrambles (sorcs.net) full time so you know the abuse a motor can take. He's the 10-11 85cc 2013 and 2014 Champion and currently in 1st place in Supermini and 3rd in Jr Trail for 2015. He races 2 races per event for a total of 3.5 hrs so you know the kind of stress the engine is under. I mix it 4oz per gallon of 93 octane.
August 14, 2015
Best oil on the market
Keeps my motor safe
March 8, 2016
Best two stroke oil
Best oil i have ever used in my bikes by far!!

PROS: Never Filed A Plug, Burns clean, Smells Great

CONS: May Clog Power Valve, Use Little Less Oil 341

October 20, 2012
Hard to beat this stuff.
Love the way it runs and smells, I very rarely foul a plug with Castor 927.

PROS: Runs And Smells Great

CONS: None

November 20, 2015
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