5w-20 or 5w-30? I've heard thing about both..
#1
5w-20 or 5w-30? I've heard thing about both..
Manual says 5w-20, however I've read that Mazda CA recommends 5w-30, and so do many forum members here. What would be best for me, assuming I'm in Florida?
#6
Alright, 5w-30 looks like the ticket. Mazda said something about some special so and so thats supposed to be in the oil for the Renesis? Its some three or four letter acronym that I just can't remember. Do I need to look out for that?
#8
I premix as well though to make up for that missing middle oil injector that they left out on the 03-08 Rx8 models.
#9
Lubricious
Join Date: Oct 2003
Location: SF Bay Area, California
Posts: 3,425
Likes: 0
Received 4 Likes
on
4 Posts
Guess what, there is no data that I know of, that gives any statistically meaningful direct correlation between viscosity and engine life for the Renesis. The population size is just too small and Mazda does not let local shops do tear-downs of failed engines to determine cause of death. What we do have are a handful of rebuilds by longtime rotary mechanics. Read and make up your own mind.
In truth, I get the feeling that type and viscosity probably doesn't make a whole lot of difference for commonly-used ranges (0w20 thru 20w50). These engines die early deaths, by piston standards, and some of the leading killers (insufficient cooling and carbon buildup) aren't mitigated to any major degree by viscosity selection. There are indications of bearing wear, but no direct corelation between bearing wear and engine failure has been demonstrated, or even any hard evidence of superiority of one viscosity over another in regard to the bearing wear. Imho, the wear probably has more to do with removal of ZDDP than it does with viscosity. In my opinion, you'll get far more benefit from pre-mixing, periodic redlining, and regularly changing the coolant.
But it sure is fun to speculate :D
#10
Surf Hard, Drive Hard
Join Date: Feb 2007
Location: Indialantic, Florida
Posts: 7,840
Likes: 0
Received 11 Likes
on
9 Posts
OP....................that's about the third thread you started on subjects that have been covered at great length. I'm surprised that you haven't been flamed yet. Might wanna learn to use the search function before randomly throwing out a thread. A little reading goes a long, long way.
#11
Out of NYC
iTrader: (1)
OP....................that's about the third thread you started on subjects that have been covered at great length. I'm surprised that you haven't been flamed yet. Might wanna learn to use the search function before randomly throwing out a thread. A little reading goes a long, long way.
this is just sad ...
#12
Registered
I'd be surprised if any part of Mazda officially goes against the corporate recommendations, though I've read plenty of owner reports where Mazda service depts use 5w30; most likely because it's what they have on hand (my guess).
IMHO, the definitive info on appropriate viscosity is contained in the excerpt from the Australian owner's manual that ASH8 posted a while back, and that a few of us have re-posted. If you're not at extremes (arctic or tropical) there's a wide range of oils that work. I don't think anyone has posted a choice that isn't OK. Then it comes down to belief.
Ken
Thread
Thread Starter
Forum
Replies
Last Post
nowakm99
Series II Technical and Trouble shooting
1
10-09-2015 07:10 AM