allstyle

Correct me if I am wrong but I came up with this idea. Disconnect the oil metering pump.....use 2 cycle premix with your gas.....then you can safely use synthetic oil without having to worry about it not burning off in the combustion chamber. Also 2 cycle oil burns cleaner than conventional oil.

fc3s.org

Yup, people have been doing that for years. It only works in 86-88's though due to the 89+ FC's having an electric OMP and the car goes into limp home mode when it is disconnected. The newer synthetics don't leave residue in the motor. The combustion temps of a rotary are 1400-1600F typically. Synthetic oil has a flash point of 600F. This was not always true, as the older synthetics did leave crap behind.

allstyle

When you say limp mode....at what percentage does the OMP still operate at?

Mykl

He means limp mode as in when you disconnect the electronic OMP from the wiring harness the ECU has a fit.

I'd like to disable mine too, for this reason, especially since I run premix in the gas tank anyway. If there was some wiring trick to make the ECU think the OMP was there I'd probably do it.

Castrol GTX is a good oil, but when I drain it it still look very worn out and beat up.

Kurgan

My 1990 T2 doesn't have an electric oil metering pump

I'm using a mechanical one designed for rotary airplane engines. I've got this cool resevoir that I keep filled up with Yamalube and the mechanical pump injects it into the engine.

Oh yeah, I have a Haltech.

fc3s.org

Actually, there is a way to bypass the OMP using resistors. I can dig up more info if you are interested.

mazdaspeed7

Youre kidding, right? I was looking for that for months, and then tried to figure it out myself and couldnt. But I did figure out a very easy way to disable the OMP so it doesnt pump oil and you can block off the lines, but the comp still things its there and working properly.

You cant just block off the lines. The omp will jam, and set off error codes endlessly. I know, because this happened to me. Then I took the working one off my parts car, pulled all of the gears, etc out of the inside and put it back in. It no longer pumps oil, and the comp is happy too, thinking it is still working fine.

allstyle

since I have an 88......leaving the oil metering pump disconnected will not harm my ecu. Because the 88's come with a mechanical pump right????

mazdaspeed7

you will be fine, only the 89-91's have the problems with the ecu if its not connected or working.

HWO

Fully Synthetic + No oil metering pump + 2 Stroke Premix + Haltech = yeah buddy now we are talking.