White goo on the dipstick?
It's normal. It is formed as a result of mixing gasoline vapors with oil and cold air from the intake.
What engine oil?

For everyday use we recommend - Motul 6100 Synergie+10w40, while for high-performance track usage Motul 300V Chrono 10w40.

Oil, filters, ignition - Mazda Rx-8

Ignition system

– Spark plugs NGK 2x RE8C-L (OEM N3Z1-18-110A) 2x RE9B-T (OEM N3Y4-18-110A) replace every 20000km when track use at least once a year.

– Ignition wires NGK RC-ZE81 blue one or OEM N3R1-18-140A replace every 40000km

– Iginition coils 4pc OEM N3H1-18-100C, NGK U5093 48283, Delphi GN10508-12B1 replace every 40000km

Lubrication system

– gearbox: Motul Gear 300 75w90 – 1,8 litra for 6 speed and 2,5l for 5 speed, replace every 50000km
– engine oil: Motul 10w40 synergie or 10w40 Chrono 300v – 4 liters replace every 8000km or once a year, 300v at least once a year. In case we use car for racing replace every 2-3 events.

– rear diff: Motul Gear 300 75w90 LS – 1,4 liters replace every 25000km


– Oil filter use only OEM N3R1-14-302 replace every oil change

– Air filter OEM N3H1-13-Z40 or good quality replacment like BOSCH F 026 400 362 or KNECHT LX2001 (preferably every oil change or every second change)

– Cabin filter OEM LDY4-61-J6X or good quality replacment KNECHT LAK235/S (depends on conditions at least once a year)

Brake fluid

– Brake fluid DOT4 or DOT5.1 replace every 2 years,  sport fluids (Motul RBF, ATE Typ 200) at least once a year.


What to do when it goes off after reconnecting the battery.
How does oil injection work - Mazda RX-8
The car does not start - flooded Mazda RX-7
The car does not start - flooded Mazda RX-8


Clutch adjustment - Mazda RX-8


We make the adjustment with the screw marked in red.
Size 12 and 10
1. The more you unscrew from the pedal (reduce the slack) the higher the clutch will take (if you overdo it, it will slip or eventually give back the thrust bearing because it will be still supported but probably the pad of the clutch will say goodbye first)

2. The more you screw in the pedal (increase the slack) it will take lower. If you overdo it this way, the gears will not come in, it will grind and it will give back something in the gearbox because it will not disengage completely.

The stem should rest lightly on the pump, not loose, and have about 1 to 2 mm. idle stroke before it disengages the clutch.

My gearbox is noisy (hum), what's going on?

In a 6 speed manual transmission, the bearings do not receive enough oil, therefore they wear out faster and run dry, which causes the noise of the transmission. As long as it works properly and the sound does not change and has a constant intensity, you do not need to do anything with it.