bandalgom78

Well, I put SAE 10-30W castrol oil in my RX-8.
Well, I just found out that need to put 5-20W.

well, You think I need to change oil right away or I can use 10-30W.

nycgps

iTrader: (1)

You'll be fine.

Im too lazy to start a Engine Oil 101. so

As long as your local Temp wont drop below freezing point.

CarAndDriver

You'll be fine....most people use 5W-20 or 5W-30 though. It takes about 3 oil changes to completely get out previous oil so you currently have a mix of old and new.

No worries.

rglbegl

DO NOT START THE CAR!!!!!! YOU WILL RUIN THE CAR!!!!!!!
j/k lol

Winning 8

it give you better protection, but less power and gas milages.

PerformRX-8

Shall i say do a search!

astro

5W30 is specified for AU spec models. So far, there's not too many that I know of who has had issues with their engine down here.

CarAndDriver

It is spec everywhere except Canada and the US.

Cody Red

My friend with a half-bridge ported fd uses 10w30. Claims he's always used it, works just fine. I know this has nothing to do with a high performace rotary, but I, myself don't use that, I use 5w30.

-Cody

thisllub

My owner's manual has everything from 5W20 to 15W50 depending on temperature.

CyprusRX8

5W30 for Europe as well.

nycgps

iTrader: (1)

5w30 for the rest of the world EXCEPT USA and Canada.

USA and Canada use 5w20 cuz it gives better emission.

otakurx

It is all I run, except in the winter I run 5-30. The 8 loves it and so does the 7.

rotarygod

After the engine is at operating temps, a 0W30, 5W30, 10W30, and straight 30W oil are all the same thickness. It's only at warm up that they are different and even then depending on how cold it really is it may not be that different as colder and colder would be closer to the bottom number. On an 80 dgree day it isn't the difference between 5 and 10 but actually much closer. Your engine doesn't really even know. Most RX-7 owners use 20W50 and I did for a long time until I switched to a thinner one just because people said I couldn't. Don't worry about it. As long as you have oil in the engine, you're fine.

NoTears316

good job

otakurx

I have always liked thicker oils, but with temps here down in the single digits sometimes ya. But the only reason I don't run more then sae30 is for my own peace of mind with the MOP. When I premix ya tractor oil is fine (esp for those high revvs)