--> Oil <--
 

I say OIL.. you say...?

Can anyone point me to some info about rotaries and OIL. Better to run any specific oil type as compared to another?

Most everyone including me use GTX 10w-30 the 40 is crap because I heard it carbonates... Anything thiker and your oil pressure will rais wich I would think puts higher pressure on your pump wering it out faster. But thats just an educated guess. Last time I used 50 my oil pressure went to 60psi. I changed it right away.. Run GTX and forget about the rest.. U will just hurt your brain thinking about.

I run GTX 20w50.

Here's something to consider:
Higher weights mean the oil is thicker. As the oil gets hotter, it gets thinner, increasing its viscosity.

Why put a thinner oil in? When the oil is too thin (viscous), it doesn't lubricate as well because it just runs off. Thus, the desire for oil that not get too thin under normal temperatures.

Now, why not put thicker oil in? When the oil is cold, your oil pump has to push that oil through the oil lines. If the oil is too thick, it won't be able to do it.

If you're in a cold climate, you want lower weights. I live in California, so I chose higher. If the oil carbonates at high weights, then another oil should be used.

Castrol 20w50 April to Sep.
using the higher viscosity allows for more heat absorbtion, 1/3 of heat created in rotary is ejected through the oil cooler.

And dual oil coolers like on the R1 gives you 3 places to eject heat: two oil coolers + radiator.

Not too thin and not too thick....I think 10w-30 comes in between. Wouldnt U.

10w30 is more for colder climates. The 30 high will break down in 90 degree temps under more than mild driving. Rotaries are hot, so cold oils will break down much quicker than when in boingers.

Correction...
 

Viscosity is a measurment of a fluid's resistance to to flow. When oil gets hotter, it gets thinner, decreasing viscoisty.

I too use Castrol GTX 20W50. Never had any problems. A must if you do a lot of hard driving. Any extra protection helps.

oil
 

20w50 with MMO ( what!! you never heard of MMO!!),,great stuff for the rotary ...put a pint or so in with the oil at oil change, lubricates the seals ..and I guess it may make the oil a little thiner so definitely use the 50 weight.......MMO= Marvel Msytery Oil....cjf

Same here.

the radiator?

Heat in general, not just via the oil.

Redline 15-40 Racing Oil

on recomendation of the rotary builder I am using --
who has 20 + years rotary building / racing experience.