Which Engine oil for Rx8 (rotary)!

[KTM525]

Im going to change my rx8's engine oil tomorrow , i need advice about which will suit rotary , it is running on synthetic right now , im asking cuz ive heard that synthetic isnt good for rotary .

Please any experts tell me

-
Shah-Rukh

[MOD-EDIT] Feedback & Suggestion forum is NOT for this type of questions. Thread moved.

[KTM525]

bumpetidump

[hash4u]

keep synthetic away from rotary
use thick viscousity mineral oil and change it regularly like every 200km's

[129]

Mobil S-plus may work for u as its a semi-synthetic i m using it for my vitz but please let the experts comment first i may be wrong

[KTM525]

Thanks but i need to confirm it , EXPERTS i need you or rx8 owners !

[hash4u]

sorry i meant to say change around every 2000km
and even dont try a semi synthetic.

it sounds funny, but the cheaper normal oil are recommended for rotaries.
people say synthetic damages the oil seals inside the rotary

[KTM525]

sorry i meant to say change around every 2000km
and even dont try a semi synthetic.

it sounds funny, but the cheaper normal oil are recommended for rotaries.
people say synthetic damages the oil seals inside the rotary

Ok so what brand?

[hash4u]

yaar saada caltex daal do.
i think its 20w 50

[imrandahar]

dont use synthetic for rotary use only zic highflow its 20w-50 sl grade means latest sl grade having 20-50 viscosity very thick like honey only use it and change after 2000km

[nadeem5476]

Mazda USA doesn't allow the use of synthetic oil for warranty support on rotary engines, it will void the warranty.
Japan, Europe and all other countries suggest synthetic oil.
Mazda's rotary racing teams run synthetic oil.

If you have less than 30,000 miles on your motor and haven't used synthetic yet start now if you like the pro;s more than the con's. From what I hear, either or is good on a new motor. If you just rebuilt your motor use non synthetic mineral oil until you break it in, then switch to syn. Syn inhibits new star-ups.
Syn makes the ruber seals swell in motor which is a good thing on new rubber.

If your motor has alot of miles on it, your engine has carbon build up that aids in sealing the motor. Syn's cleaning properties will remove all of that carbon build-up. Your small leak may become larger.

If you have less than 30,000 miles on your motor and haven't used synthetic yet start now if you like the pro;s more than the con's. From what I hear, either or is good on a new motor. If you just rebuilt your motor use non synthetic mineral oil until you break it in, then switch to syn. Syn inhibits new star-ups.
Syn makes the ruber seals swell in motor which is a good thing on new rubber.

If your motor has alot of miles on it, your engine has carbon build up that aids in sealing the motor. Syn's cleaning properties will remove all of that carbon build-up. Your small leak may become larger.

[Xulfiqar]

you need mineral oil for any rotary engine, it injects it on the apex seals to make them seal better and not eat away the nikasil and gets burned away - simple havoline formula engine oil is best for you, replace it on every 3000 or 4000 - as the rotary engine oil is used mainly for cooling the rotor internals and carry away the heat to the air cooled oil heat exhanger in front of the car - it comes out clean after 4000 kms of driving

NEVER NEVER use synthetic in a rotary - synthetic oil doesnt burn and congeals to plastic when attempted to burn - in effect killing your motor.

advice from a rotary engine rebuilder i.e. myself is to add 2 litres of emarat 2 stroke oil to every tankfull of petrol, your car will love you for it.

[ZarakD]

Rx8 toy car? i needs battarys not oil

[shaz008]

Do not use syn oil on a rotary engine. In this part of the world where the tempreture reaches around 40C in summers syn oil will not be suitable . Every body who has tried using syn oil in Karachi have faced some problems in their rotary. And if you have used syn oil previously then get it flushed and then use non- syn oil. Use either Caltex Havoline 20W -50 or Castrol Gtx 20W -50. Cheers!!

[fahdchhapra]

ok , here it is , keep synthetic oil away from rotary engines ,
why ? because synthetic oil does not burn clean inside the combustion chamber and leaves chemical residue behind which is good for a normal piston engine but a bad for a rotary engine , cause as the residue piles up in the rotar housing it starts to pile up towards apex seal of the rotar causing it lose compression or damage the seal or the housing ,
i have a RX-7 with its original 13b rotary engine and i use caltex 10 40 non synthetic oil and change it at every 1500km or less ,
if you need help just ask , i will be glad to help you , iam learning about rotary engines every day
bye!!

[Xulfiqar]

1500Km thats tooo early - I beleive your oil temeperatures are not regulated properly - did you check your oil cooler air ducts - they can cause massive oil temperatures

[shaz008]

@Xulfiqar, Advise when shld we change the manual gear box oil and differencial oil and which ones are recomended.And yes also please advise who is the right mechanic for all these tune ups.

[Xulfiqar]

you need API GL4 SAE 75W90 in both manual tranny and diff - get the emarat 5 litre pack its more than enough,,, about shops - I dont know any mechanic doing RX's - all the people with rotary running RX7s I know are fixed by me.. - never heard a succesful RX7 repair from the big garages, they always are like - gaari barbaad kardi etc.

[shaz008]

when do we require to change both these lubes , like the car ain,t causing any problems , but a friend Waleed gave me these suggestions i.e. maintainence tips for Rx-8 which states that we have to change the diff and gear oil after 25000 kms . So what do you suggest .

[Xulfiqar]

about 20ks sounds good - coz we are dusty anyway - if its not screaming or anything then check the lube condition if its loaded with particles then change it

[shaz008]

@ xulfiqar can you geme your number