Notices
RX-8 Discussion General discussion about the RX-8 that doesn't fit in one of the specialty forums.

Zomg, another oil thread?!?!

Old 09-01-2013, 09:02 PM
  #1  
Registered
Thread Starter
 
Join Date: Apr 2013
Location: Nashville, Tn
Posts: 67
Likes: 0
Received 0 Likes on 0 Posts
Zomg, another oil thread?!?!

So I finished my first major part replacement (that I did on my own) with the help of the DIY forum here. I know it's probably not that major, but I changed the radiator, cleaned the engine bay, and then tossed in a new expansion tank while I was at it. Considering all I've ever done is change fluids, I'm pretty proud of the fact I did it in just shy of 5 hours LOL (From parking the car in my buddy's garage to starting her back up).

Anyway, the oil question. I was filling up my 4oz bottles that I keep in the trunk with Idemitsu premix oil when I realized it's a synthetic oil. Now I'm sure I'm going to get some slack for asking this question, but I thought the general idea for putting non-synthetic oil in our cars is because it burns easier and cleaner. So why add a little extra lube to the fuel using a synthetic oil when it's the very fluid that actually burns to begin with?
Tethlah is offline  
Old 09-01-2013, 09:09 PM
  #2  
Verbose SuperMod
iTrader: (2)
 
Join Date: Oct 2007
Location: Pacific Northwest
Posts: 16,683
Likes: 0
Received 137 Likes on 76 Posts
Short answer:
The perceived problem with "synthetic oil" is a perceived problem with how cleanly 4-stroke synthetic oil burns. 2-stroke oil is designed to burn cleanly, even if it is a synthetic.


Longer answer:
Everyone that insists that 4-stroke oil doesn't burn cleanly enough is quibbling over factors that don't even frackin matter.
A) Dirty filthy 4-stroke won't ever burn cleanly, regardless of if it's 'synthetic' or 'dino'. It isn't designed to burn cleanly and it gets REALLY filthy in our oil pan, so there is plenty of junk getting injected with it that isn't even classified as 'oil' any more.
B) NO generally accepted 4-stroke oil out there is actually a 'non-synthetic'. If the bottle containing the oil isn't labeled 'synthetic', it is still synthetic. Different additives, but still synthetic.
C) NO ONE has provided even a shred of evidence on if filthy 4-stroke 'dino' burns "cleaner" than filthy 4-stroke 'synthetic'
D) Installing a SOHN adapter bypasses this whole debate by preventing the engine from injecting filthy 4-stroke and injecting clean 2-stroke instead.

Premix doesn't even get involved in this debate, as all 2-stroke oil is designed to be burned.
RIWWP is offline  
Old 09-01-2013, 09:44 PM
  #3  
Out of NYC
iTrader: (1)
 
nycgps's Avatar
 
Join Date: Jun 2005
Location: Planet Earth
Posts: 19,867
Received 14 Likes on 13 Posts
The synthetic does not burn clean is nothing but 100% bulllshit

Synthetic kills rotary is another bullshit
nycgps is offline  
Old 09-01-2013, 09:45 PM
  #4  
Verbose SuperMod
iTrader: (2)
 
Join Date: Oct 2007
Location: Pacific Northwest
Posts: 16,683
Likes: 0
Received 137 Likes on 76 Posts
"Filthy 4-stroke synthetic doesn't burn clean" <- it's true.

"Filthy 4-stroke non-synthetic doesn't burn clean" <- it's true too.
RIWWP is offline  
Old 09-02-2013, 09:36 AM
  #5  
Registered
 
jasonrxeight's Avatar
 
Join Date: Jan 2010
Location: Omaha, NE
Posts: 3,487
Likes: 0
Received 0 Likes on 0 Posts
oil in general burns clean regardless synthetic of dino. its the addictives making it multi-grade and staying clean cause the deposit.
in that case even wrong additives in gasoline can cause deposit too.
jasonrxeight is offline  
Old 09-02-2013, 10:06 AM
  #6  
Registered
Thread Starter
 
Join Date: Apr 2013
Location: Nashville, Tn
Posts: 67
Likes: 0
Received 0 Likes on 0 Posts
yeah, that all makes sense. I'm checking out the SOHN adapter and looking into if that's the next mod I should do. I was just confused because I kept getting it drilled that synthetic = bad for rotary engines. But it makes total sense that its the fact that the engine oil has other things in it that makes it worse because even if the oil burns off, the filth and grime in it will not.

Now, lets say I either convert my washer fluid bottle or add another tank and do the SOHN adapter, I've seen in a DIY that he added a filter for it. Would you really need that? Really if you are pouring clean oil into the bottle and never leave the thing uncorked, you shouldn't have to worry about not having clean oil go into the engine. When it pulls oil in to lube the seals, is there any pressure there or is it just gravity fed? Thus making a filter just a blockage.
Tethlah is offline  
Old 09-03-2013, 06:58 AM
  #7  
Verbose SuperMod
iTrader: (2)
 
Join Date: Oct 2007
Location: Pacific Northwest
Posts: 16,683
Likes: 0
Received 137 Likes on 76 Posts
No filter required, but no harm done either. Entirely up to you.

The sohn adapter itself is gravity fed. The factory OMP is a positive displacement stepper motor pushing oil through as long as it sees a source and isn't blocked downstream.
RIWWP is offline  
Old 09-03-2013, 07:06 AM
  #8  
Maude Rater
iTrader: (15)
 
paimon.soror's Avatar
 
Join Date: Jun 2010
Location: Between Cones
Posts: 7,562
Received 14 Likes on 13 Posts
I personally wouldn't put a filter on a gravity fed accessory. Oil filters cause significant drag in flow and I dont think you would be able to keep up the flow with the OMP when it runs through a filter. If you were going to use a filter, I would have it on the filler neck of your bottle.
paimon.soror is offline  
Old 09-03-2013, 07:09 AM
  #9  
Verbose SuperMod
iTrader: (2)
 
Join Date: Oct 2007
Location: Pacific Northwest
Posts: 16,683
Likes: 0
Received 137 Likes on 76 Posts
Yeah. Good point. Any in-line filter should be larger than the line, so the total volume of oil flow isn't reduced.
RIWWP is offline  
Old 09-03-2013, 07:25 AM
  #10  
Maude Rater
iTrader: (15)
 
paimon.soror's Avatar
 
Join Date: Jun 2010
Location: Between Cones
Posts: 7,562
Received 14 Likes on 13 Posts
the filter would also need to sit above the median length of the line and ideally as close to the reservoir to minimize the risk of free flow stoppage.
paimon.soror is offline  
Old 09-14-2013, 06:49 PM
  #11  
Registered
 
Join Date: Jul 2013
Posts: 24
Likes: 0
Received 0 Likes on 0 Posts
So do the dealers drain the factory oil just in case someone at the factory installed the wrong oil such as Genuine Mazda Synthe-Renesis oil?
androbot2084 is offline  
Old 09-14-2013, 07:09 PM
  #12  
Verbose SuperMod
iTrader: (2)
 
Join Date: Oct 2007
Location: Pacific Northwest
Posts: 16,683
Likes: 0
Received 137 Likes on 76 Posts
Huh?

No, they don't go around draining owners oil.

They drain oil during an oil change, but oil type has nothing to do with having to drain old oil to put new oil in.

Engines aren't shipped with oil in them.




...and I can't think of any other context that your question could apply to, or even how it applies to this thread.
RIWWP is offline  
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Dokuji
Series I Trouble Shooting
8
11-01-2016 02:51 PM
uZu
New Member Forum
13
12-30-2015 12:35 PM
wanted797
New Member Forum
3
08-26-2015 11:24 PM
akagc
RX-8's For Sale/Wanted
7
08-11-2015 07:07 PM
Pelleilee
New Member Forum
5
08-02-2015 02:44 PM


Thread Tools
Search this Thread
Rate This Thread
Rate This Thread:
You have already rated this thread Rating: Thread Rating: 0 votes,  average.

Quick Reply: Zomg, another oil thread?!?!


Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.