Good technical discussion about Engine Oils
08-05-2009, 10:01 PM
#401
Super Moderator
I wonder if the Bolt Head on the RX-8 cooler can be removed and can do the same drain from there?
Check out the Oil Cooler Thermostat thread for my senior moment!
And the parts diagram of the RX-8 cooler.
Mazda don't list the separate parts like the FC oil cooler for the 8.
08-05-2009, 10:13 PM
#403
Super Moderator
https://www.rx8club.com/series-i-tech-garage-22/oil-cooler-thermostat-167731/#post3154046
08-05-2009, 10:31 PM
#405
Super Moderator
Well to be honest, I really do not know.
RG does it on his FC RX-7, however, even though there is a bolt head shown on the RX-8 oil cooler, I don't know if this will freely undo, and if you can drain the oil OK, perhaps you could be the first to try?
You would have to remove (your "Vent" "modified"..I hope) inner guard splash shield to get to it.
RG does it on his FC RX-7, however, even though there is a bolt head shown on the RX-8 oil cooler, I don't know if this will freely undo, and if you can drain the oil OK, perhaps you could be the first to try?
You would have to remove (your "Vent" "modified"..I hope) inner guard splash shield to get to it.
08-05-2009, 10:48 PM
#407
Yes sir.
but thats not what it meant for. I still do it tho
(Talking about FC here)
Hmm ... I can try it, I am almost due for oil change anyway (1700 miles already)
IF I **** up my oil cooler that way ... would you send me a new one in mail for free ? HEY ! ITS YOUR FAULT ASH8 !!!
but thats not what it meant for. I still do it tho
(Talking about FC here)Well to be honest, I really do not know.
RG does it on his FC RX-7, however, even though there is a bolt head shown on the RX-8 oil cooler, I don't know if this will freely undo, and if you can drain the oil OK, perhaps you could be the first to try?
You would have to remove (your "Vent" "modified"..I hope) inner guard splash shield to get to it.
RG does it on his FC RX-7, however, even though there is a bolt head shown on the RX-8 oil cooler, I don't know if this will freely undo, and if you can drain the oil OK, perhaps you could be the first to try?
You would have to remove (your "Vent" "modified"..I hope) inner guard splash shield to get to it.
IF I **** up my oil cooler that way ... would you send me a new one in mail for free ? HEY ! ITS YOUR FAULT ASH8 !!!
Last edited by nycgps; 08-05-2009 at 11:22 PM.
08-05-2009, 11:42 PM
#409
road warrior
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Having installed a new oil cooler on my RX-8, I don't remember seeing anything on there that would easily allow draining of the cooler. The in and out bolts need to be oriented and are a bitch to put on anyway. I think we're a bit out of luck in that regard.
08-06-2009, 12:11 AM
#410
did some searching and found the answer - at last !
http://www.xtranormal.com/watch?e=20090806043244181
http://www.xtranormal.com/watch?e=20090806043244181
Last edited by Brettus; 08-06-2009 at 04:14 AM.
08-06-2009, 12:55 AM
#412
did some searching and found the answer - at last !
http://www.xtranormal.com/watch?e=20090806005618139
http://www.xtranormal.com/watch?e=20090806005618139
beers
08-06-2009, 01:36 AM
#413
3-wheeler
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did some searching and found the answer - at last !
http://www.xtranormal.com/watch?e=20090806005618139
http://www.xtranormal.com/watch?e=20090806005618139
08-06-2009, 10:04 AM
#416
Lubricious
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did some searching and found the answer - at last !
http://www.xtranormal.com/watch?e=20090806043244181
http://www.xtranormal.com/watch?e=20090806043244181
I think i killed the thread
08-07-2009, 08:40 PM
#420
did some searching and found the answer - at last !
http://www.xtranormal.com/watch?e=20090806043244181
http://www.xtranormal.com/watch?e=20090806043244181
YOU STUPID NEWBIE *** !
08-14-2009, 03:42 AM
#422
Super Moderator
Stationary Gear Bearing wear on Rotaries
https://www.rx8club.com/showpost.php...&postcount=140
Quote..
According to Mr Engman: A thicker viscoscity would have provided a greater cushion countering to some extent the mis-alignment that is somewhat natural in engines. The greater cushion allows the fine particles, that are by-products of combstion, to move along without doing as much polishing away at the babbit as occurred in this case. This is his opinion based upon examining bearings for decades.
My own thoughts on the viscoscity issue is this: The requirements for a 5W oil are not present here in the US at any time in the year. The flow rate test for a 10W are conducted at -30C and therefore more than adequate. The 40 weight side that I recommend is important to behavior of the oil when hot (And especially in hot climates). You want to, again, provide that cushion for the shaft. Let's not forget that several other countries have thicker oil recommendations from Mazda for their RX8s. The engines that we build for race teams (Renesis) don't have bearings looking like this because they're running 20W50.
Why are we being told that we should run 5W20? I would think it facilitates a quicker warm up and helps both fuel economy and horse power numbers ever so slightly. I think we have unique emission requirements here that warrant doing every last thing to enhance both the fuel mileage and power numbers.
Paul.
An Oil Filter Magnet is also a MUST for the Series I RX-8's (as they have no factory fitted sump magnet) to assist capture of fine metal particles in your engine oil.
Quote..
According to Mr Engman: A thicker viscoscity would have provided a greater cushion countering to some extent the mis-alignment that is somewhat natural in engines. The greater cushion allows the fine particles, that are by-products of combstion, to move along without doing as much polishing away at the babbit as occurred in this case. This is his opinion based upon examining bearings for decades.
My own thoughts on the viscoscity issue is this: The requirements for a 5W oil are not present here in the US at any time in the year. The flow rate test for a 10W are conducted at -30C and therefore more than adequate. The 40 weight side that I recommend is important to behavior of the oil when hot (And especially in hot climates). You want to, again, provide that cushion for the shaft. Let's not forget that several other countries have thicker oil recommendations from Mazda for their RX8s. The engines that we build for race teams (Renesis) don't have bearings looking like this because they're running 20W50.
Why are we being told that we should run 5W20? I would think it facilitates a quicker warm up and helps both fuel economy and horse power numbers ever so slightly. I think we have unique emission requirements here that warrant doing every last thing to enhance both the fuel mileage and power numbers.
Paul.
An Oil Filter Magnet is also a MUST for the Series I RX-8's (as they have no factory fitted sump magnet) to assist capture of fine metal particles in your engine oil.
08-14-2009, 06:10 AM
#423
Momentum Keeps Me Going
I'll post this oil informtion link here for anyone interested. There was so much conjecture and opinion in the "Official Synthetic Oil for the RX-8" thread about Idemitsu's product, I figured the simply way to get to the bottom of it was (!) to ask them....
After submitting a list of questions, I received a reply w/specific answers from Idemitsu and permission to publish on the forum. The answers provide more information we've never had before about their synthetic rotary engine oils.
https://www.rx8club.com/showthread.p...96#post3168796
After submitting a list of questions, I received a reply w/specific answers from Idemitsu and permission to publish on the forum. The answers provide more information we've never had before about their synthetic rotary engine oils.
https://www.rx8club.com/showthread.p...96#post3168796
08-17-2009, 10:18 AM
#424
SARX Legend
iTrader: (46)
I just changed my oil for the first time in the new engine (1500 miles) and it was jet black. I got about 4.5 quarts out and refilled with Castrol Syntec (German) 0W30. I have some white smoke at cold start-up and once I use this TW3C synthetic 2 Stroke up I'll be switching to Idemitsu. My exhaust tips get pretty sooted but I don't have a cat so..... we will see if I can eliminate the black soot on the tail pipe. Not sure if its the no cat, the premix, or the oil that was causing the soot.
