valvoline. sae approved and technician's preferred brand.

it has a wide range of grades available. and even straight grades, so 30w here of valvoline...why bother paying for multigrade here in so-cal? it don't snow...weather changes are not THAT dramatic here to really call for a ?/w30 oil.

so...whatever thats cheap and has current SM grade works for me.

valvoline.

how about a poll separate for transmission and differential?

what brands are out there for trans and diff???

i use royal purple for both currently, but may find something different for the trans on the next change.

chime in on the brands and and grades and for trans/diff... this'll be interesting. wait till i get the brands, then i'll start the poll thread.

I've only used castrol... period. Had my deal since '04 and still runnin strong. Might try Royal Purple too since that seems schnazy.

Castrol GTX 5W20!!!!

I've used Pennzoil and Shell ,but mostly Pennzoil 5w 30

I have run Castrol GTX 20/50 in all my rotary engines dating back to 86. Every engine went over 200.000 miles and still had 70psi oil pressure. My Renesis now uses 10/30 GTX.

Castrol GTX 5w20

Looks like a lot of Castrol fans.
Anyone hear anything about Quaker? That's what I generally use.

Quaker's state is a shell company.

I've used their Advance Q b4 for maybe 3-5K miles. Its ok IMO.

5w30, btw.

Castrol is famous cuz its sooooo easy to get and .... cheap. Quality is good. not a bad choice.

I use Royal Purple of course. but I just had Shell Full Synthetic 5w30. Not a bad choice I think, and at 15-16 bux for 6 quart (after MIR), I think its worth it :)

I'm in California and the Havoline I am using for my RX8 is blended and packaged nearby in Richmond, CA....Havoline is produced by the Chevron Corp. although I agree it is not quite as easily available as PNZ,QS,CSTRL. Most WalMarts have it tho.

oil ?
 

my 04 6speed has 50500,just had to replace alternator,i live in palm desert ca.( hot) been thinking maybe to use 5-30 oil. love this car but worried about engine failure. what say you.

I use valvoline, the regular one (white bottle with blue label) 10w-30 in the FD.

You forgot Mobil 1 !!! They're everywhere.

Its expensive oil.

Im happy with RP

would it be a bad idea to mix castrol gtx 5w-20 with royal purple?

Castrol all the way..... Since my dealer uses it, I've stayed with it.

ive been using castrol gtx 5w-20. i checked my oil the other day and found this gooey yellow slime on the dipstick. is that normal? maybe it was because it was cold. do all oils do this?

Pennsoil 5W-20
20K miles on my 05 sport and not a lick of problems.
I do add a bit of 2 cycle oil when I take it autocrossing just to make me feel better.

Royal Purple 5-20w for me since I bought the car in Jan '06. Includes engine, tranny and differential.

normal, lots of threads about it. and why the hell would you want to mix syn & dino?

i dunno, its the top 2 oils, maybe if i use both i will run 7 seconds?:dunno:

Royal Purple Oil. I was talking to my brother, he has an RX8 too. He told me about new oil in the market. 0W - 40 viscosity oil.
A Zero viscocity to statrt is great, it would lube the engine at it's most critical point, starting up. Subsequently the viscocity would climb up to 40 ( or 30, or 50 which ever the secondary grade )
Sounds good.

Currently using Idemitsu rotary-specific 10W-30!!

I used Royal Purple till about 40,000 miles...a compression test showed kick ass results yielding only one slightly less than perfect apex seal in my 1st rotor.

RP seemed to break down quicker as I noticed vast differences before and after an oil change. I've had better results with the Idemitsu.

Pennzoil Platinum 5W20 in sump with Lube Control LC20 added at prescribed rate.

Idemitsu Rotary Premix (IRP) through OMP (Sohn Adapter) with Lube Control FP Plus added (1 oz per quart as an antioxidant when added to oil tank).

Premix in fuel - IRP with FP Plus (6 oz IRP and 2 oz FP Plus per 12 gallon average refill)

Pennzoil?

Your gonna get carbon with that. It may be fine for a piston engine with alll the gummy residue left behind, but not in a rotory.

Well, don't tell my FD that. It's still running on the original 14 year old engine and turbo