[djmtsu]

My car seems to use a lot of oil. How often do I need to check it?
Everytime you get gas, you should check your oil level. The Rotary motor by design is supposed to inject oil into the engine based on throttle position. If you keep your foot on the gas a lot, you will use more oil. It is normal to use about 1 quart of oil every 1000 to 3000 miles.


Can I use synthetic oils in my Rotary engined car?
Yes and no. Mazda officially does not recommend the use of synthetic oils in rotary engines, however, long term and racing use has shown that the better synthetics (Redline, Amsoil, Neo, Royal Purple, Mobil1) are perfectly fine to use in a rotary engine, and will generally result in a 1 to 2% horsepower gain. However use of poor quality synthetics (like Valvoline, Castrol Syntec, Havoline, Etc) will result in build up due to high ash content left from these oils when they are burned. It is believed that is why Mazda did not recommend synthetics, because the couldn't pick favorites.

Other notes:
The Mazda Factory racing departments recommend and use ‘synthetic’ oils including the winning 1991 Leman’s 20-G 4 rotor Mazda 787B.

MazdaComp USA printed manual (now Mazdaspeed) recommends the use of synthetic oils for racing conditions.

Redline, Amsoil and Royal Purple Synthetic Motor Oils have been used in rotary engines (both race and street) for ten plus years with excellent results.

Most Synthetic Motor Oil is compatible with the bearing material, sealing elastomer's, and combustion seals used in a rotary engine.


What oil should I use in the FC?
According to Mazda:
In starting and operating temperatures below 20F, use 5W30
In starting and operating temperatures between 0F and 80F, use 10W30.
In starting and operating temperatures above 30F, use 20W50

As far as brand any good quality oil that meets the API SL or SM standards should be fine.


How do I kill that buzzer in the dash that goes off when the cooling system or oil is low?
You need to bleed the coolant or fill the oil. The buzzer is there to help you from blowing up your motor.

I am having trouble keeping the car cool
Do you have:

OEM thermostat? (of KNOWN condition) do not use aftermarket thermostats like Stant in 86-88 engines
The plastic Undertray under the radiator and front of the engine?
A radiator with a clear core and not too many bent fins?
Two belts running your water pump?
OEM rad cap? (of KNOWN condition) (note: the stock pressure ( .9 bar) radiator cap suggested for proper cooling and system health).
A coolant mixture of at least 40% coolant, to 60% distilled water (do not use tap water) or 50/50 mixture (recommended in climates that drop under 0F).

I want to install an electric fan. How well will it cool? How much power does it give me? Which fan, and how do I install it?
In short, you gain a small amount of throttle response when free-revving in neutral, and any power gained (less then 1HP) is almost immeasurable. Cooling will be no better then using the stock clutch fan since the fan is only used at idle or very low speed driving, and it is the thermostat that regulates the temperature of the engine and not the fan. There's really no compelling reason to install an electric fan unless you need the space (FMIC, 20B install, etc.) or your stock clutch fan died. Remember that the stock clutch fan freewheels when it is not needed, so it doesn't suck any power from the engine.