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#3177828 - 11/04/13 07:04 AM Re: How to care for RX-8 (rotary)? Proper oil? [Re: blackman777]
Durango Offline

Registered: 02/15/07
Posts: 2071
Loc: Los Angeles, California
Originally Posted By: blackman777
I am shopping for a Mazda RX-8 but reading a lot of horror stories about the rotary engine:
- never use synthetic oil
- buy lots of oil because the engine consumes a quart every 1000-2000 miles
- the seals often "blow out" and need replaced

Anybody have recommendations on what proper Oil to use in this finicky engine? The manual says 5w-20 but I'm thinking a thick 5w-40 might be better to reduce consumption? (Not Mobil 1 as it's synthetic.)


A buddy of mine had one about 8 years ago and he reported nothing unusual except for the extra oil that the rotary consumed about one per month he had to put in a quart. I don't beleive he used any synthetic oil of any type.

He also didn't say anything about the seals blowing out nor needed replacing.

If I were you I'd just use a 5w-20 like the manual says and not the 40w cuz the rotary consumes oil like normal. It's the nature of the beast.

When you finally decide I'd consider another engine/car cuz I think after 2014 I believe Mazda isn't going to make any rotaries anymore but instead of concentrating on the "Sky Active" engine technology.


#3182818 - 11/09/13 08:42 AM Re: How to care for RX-8 (rotary)? Proper oil? [Re: Durango]
blackman777 Offline

Registered: 01/08/13
Posts: 981
Loc: Santa Ana, California
As I said I just like collecting cars with non-standard powerplants (the standard I4s or V6s are not interesting). It sounds like there will be another rotary in 2016:

"We were told by a Mazda USA insider (while we are all here together at the festivities in Monterey) is that the first application of the new 16X engine will be happening in two years' time in an as yet undisclosed new model."

Here's Mazda's own website about the engine:

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