Idemitsu Racing Rotary Engine Oil 10W-30 and 20W-50
#4
Registered User
Join Date: Jun 2002
Location: Misinformation Director - Evolv Chicago
Posts: 3,086
Likes: 0
Received 0 Likes
on
0 Posts
#5
Registered
The bearing tolerances on the Renesis are tighter. There is less physical room for oil inside the bearing races. That's why you don't run as thick of an oil in this engine. All of the oil passages are also smaller than in previous rotaries. Keep this in mind if you want to run 20W50. 5W30 is perfect.
#7
Registered User
The bearing tolerances on the Renesis are tighter. There is less physical room for oil inside the bearing races. That's why you don't run as thick of an oil in this engine. All of the oil passages are also smaller than in previous rotaries. Keep this in mind if you want to run 20W50. 5W30 is perfect.
The MOP design is basically the same(other than the method of control)The oil injectors are basically the same.
The only significant difference in tolerances I could find was the rotor to housing side clearance,which is less on the Renesis engine.This has bugger all to do with lubricant viscosity.
I am not sure which internal oil passages you refer to but the top oil gallery uses the same dowels and O rings.(or at least it did when I rebuilt my Renesis).
Finally,when I got around to checking out my 1988 RX-7 Work Shop Manual,the recommended lubricants for temperatures over 80F are 10W40,10W50,20W40 and 20W50.
As I have said elsewhere I have been using 10W40 and my motor is fine.When I rebuilt it I reused the apex seals because they were indistinguishable from new(other than the broken ones).
My motor is quiet,even in the 110F heat in Las Vegas,it starts instantly, I am getting 23mpg on the highway,and using about 1quart of oil about every 2500 mile or so.
For those who prefer to use 5W20,particularly in hot conditions,the engine rebuilders are going to love you when your warranty expires.
#9
the shit starter
Join Date: Mar 2006
Location: Houston
Posts: 673
Likes: 0
Received 0 Likes
on
0 Posts
I use 5W20 Royal Purple. I also live in Houston where most of the time temperatures range from 80-100.
Using this oil is this hot temperature is going too cause me too need an engine rebuild quicker?? What's suggested then?
Using this oil is this hot temperature is going too cause me too need an engine rebuild quicker?? What's suggested then?
#11
the shit starter
Join Date: Mar 2006
Location: Houston
Posts: 673
Likes: 0
Received 0 Likes
on
0 Posts
I don't understand... Why does it say on the oil cap too use 5w-20 then? If 5w-30 is used too meet factory specs then why doesn't it come from the factory telling you too use 5w-30?
Or is the factory just wanting me too destroy my engine?
Or is the factory just wanting me too destroy my engine?
#13
Registered
Going one grade higher would not hurt any car. The one thing against it, IMHO, is that it's a tradition going back many decades, predating modern oil technology. (Tom McCahill always recommended it. As well as single weight, non-detergent oils.) Unless you live in a very hot place, though, I'd be leery of upping the "5" part.
Ken
#14
the shit starter
Join Date: Mar 2006
Location: Houston
Posts: 673
Likes: 0
Received 0 Likes
on
0 Posts
nope... but I didn't start a new thread over my newbness either... So it's a win/win...
Thanks Ken for giving me a quick in depth answer. It's been 60,000 miles with 5w20... I'm going too get a change this Monday too 5w30...
Thanks Ken for giving me a quick in depth answer. It's been 60,000 miles with 5w20... I'm going too get a change this Monday too 5w30...
#15
No respecter of malarkey
iTrader: (25)
I wasn't referring to you, but I run 5W20 with premix and as far as I'm concerned this "the engine builders are going to love you" crap is just talking out your @ss BS, there's absolutely no validation for that claim
the same for outdated theories and ideas that have no relevance for today's technology
the same for outdated theories and ideas that have no relevance for today's technology
Last edited by TeamRX8; 07-01-2007 at 11:34 AM.
#16
the shit starter
Join Date: Mar 2006
Location: Houston
Posts: 673
Likes: 0
Received 0 Likes
on
0 Posts
awesome, everybody has a different opinion on what the hell too use... The oil pressure idea doesn't make any sense... If they meant for the N orth American versions too be 5w20, then they probably adjusted the pressure for that wouldn't they?
At this point I'm just staying with 5 20 unless somebody can prove too me that it lowers the engine life
At this point I'm just staying with 5 20 unless somebody can prove too me that it lowers the engine life
#17
Registered
Join Date: May 2006
Location: Milan, Michigan
Posts: 575
Likes: 0
Received 0 Likes
on
0 Posts
awesome, everybody has a different opinion on what the hell too use... The oil pressure idea doesn't make any sense... If they meant for the N orth American versions too be 5w20, then they probably adjusted the pressure for that wouldn't they?
At this point I'm just staying with 5 20 unless somebody can prove too me that it lowers the engine life
At this point I'm just staying with 5 20 unless somebody can prove too me that it lowers the engine life
Look at this video .. 4:50 into the video, they use 0w20....
http://www.youtube.com/watch?v=lYEpUWm-S0Q
5w20, 5w30..... either one should be fine....
![Smilie](https://www.rx8club.com/images/smilies/smile.gif)
#19
Registered User
I wasn't referring to you, but I run 5W20 with premix and as far as I'm concerned this "the engine builders are going to love you" crap is just talking out your @ss BS, there's absolutely no validation for that claim
the same for outdated theories and ideas that have no relevance for today's technology
the same for outdated theories and ideas that have no relevance for today's technology
#20
If it makes you feel better, they even use the 20 weight in Japan.....
Look at this video .. 4:50 into the video, they use 0w20....
http://www.youtube.com/watch?v=lYEpUWm-S0Q
5w20, 5w30..... either one should be fine....![Smilie](https://www.rx8club.com/images/smilies/smile.gif)
Look at this video .. 4:50 into the video, they use 0w20....
http://www.youtube.com/watch?v=lYEpUWm-S0Q
5w20, 5w30..... either one should be fine....
![Smilie](https://www.rx8club.com/images/smilies/smile.gif)
![Smilie](https://www.rx8club.com/images/smilies/smile.gif)
Thread
Thread Starter
Forum
Replies
Last Post
Sifu
RX-8 Parts For Sale/Wanted
3
08-30-2015 10:51 PM