Cumulative Synthetic Oil Discussion
Sorry to bring the dead thread back.. I agree with rotary god. Gas quality would affect as much as oil quality.. I used synthetics on my FDs for several years. Even when my coolant seal went out and my PFC read 124+C water temp, I drove 200+ miles back to my home just watching the oil temp. When the engines broken down, It had some carbon build up, but hard to say if its because of oil.. But everything else (inside rotor, e shaft, etc looked good). I used Mobile 1.
Now, I just switched to conventional oil just because the cost issue and didn't see much benefit... as I change 1500 miles on my FD.
But those of you who's concerned about synthetic oil injection, I know FD there is an adaptor in which you could inject 2 cycle instead. I'm going that route on my FD that I'm building and run full 100% Mobile 1
Also, people need to realize, driving habits could result more in carbon build up. And also, the RB statement about rubber seal deterioration.. who knows.. If Mazda uses cheap seals that can't even handle that, I would be VERY surprised.. As during winter time, most gas uses EtOH in which harms more than some additive in oil.. Again, I think we are looking too much into this..
Now, I just switched to conventional oil just because the cost issue and didn't see much benefit... as I change 1500 miles on my FD.
But those of you who's concerned about synthetic oil injection, I know FD there is an adaptor in which you could inject 2 cycle instead. I'm going that route on my FD that I'm building and run full 100% Mobile 1
Also, people need to realize, driving habits could result more in carbon build up. And also, the RB statement about rubber seal deterioration.. who knows.. If Mazda uses cheap seals that can't even handle that, I would be VERY surprised.. As during winter time, most gas uses EtOH in which harms more than some additive in oil.. Again, I think we are looking too much into this..
You use/used Evil Synthetic ! Thou are evil ! Shall be ban from the Rotary Community !
Now give me all your rotaries, Maybe the Holy Anti-Synthetic empire might forgive your past ...
road warrior
Joined: Feb 2006
Posts: 1,861
Likes: 3
From: Oakland and Los Angeles, CA
From what I've gathered, in order to avoid warranty hassles you would need to use an oil that meets the requirements laid out in the owner's manual. Based upon that, I thought any 5w20 oil synthetic or not should be fine, as long as it meets API-SL and ILSAC certification.
Oddly enough though, not only did the dealer tell me to absolutely not use synthetic oil, but they also said that 5w30 dino oil was ok even though it isn't mentioned in the owner's manual. To me this means they don't really know and that I should use the 5w30 Royal Purple that I was originally planning to. Came up with that as I live in Florida and will be doing some autocrossing.
I've searched and seen the endless debates on synthetic, but my question to those who have been given a hard time about using synthetic is, does Mazda care about you not following their suggested weight, or just that you used synthetic?
Oddly enough though, not only did the dealer tell me to absolutely not use synthetic oil, but they also said that 5w30 dino oil was ok even though it isn't mentioned in the owner's manual. To me this means they don't really know and that I should use the 5w30 Royal Purple that I was originally planning to. Came up with that as I live in Florida and will be doing some autocrossing.
I've searched and seen the endless debates on synthetic, but my question to those who have been given a hard time about using synthetic is, does Mazda care about you not following their suggested weight, or just that you used synthetic?
Registered
Joined: Apr 2003
Posts: 9,134
Likes: 26
From: Houston
From what I've gathered, in order to avoid warranty hassles you would need to use an oil that meets the requirements laid out in the owner's manual...
... I've searched and seen the endless debates on synthetic, but my question to those who have been given a hard time about using synthetic is, does Mazda care about you not following their suggested weight, or just that you used synthetic?
... I've searched and seen the endless debates on synthetic, but my question to those who have been given a hard time about using synthetic is, does Mazda care about you not following their suggested weight, or just that you used synthetic?
I was just browsing through the owner's manuals for the newer RX-8s ( http://www.analogstereo.com/mazda_rx8_owners_manual.htm ), and noticed that they don't even mention synthetic until the 2007. In the 2007 owner's manual, the only thing it says about synthetic is that it may worsen starting performance. Now that's something that I've never heard before. 
Btw, rotarygod, thats what I figured. My only concern was if they wanted proof of maintenance. They had no problem ordering my free replacement engine with no service history at all though, so I'm not too worried there now.
Btw, rotarygod, thats what I figured. My only concern was if they wanted proof of maintenance. They had no problem ordering my free replacement engine with no service history at all though, so I'm not too worried there now.
Last edited by Jasonawojo; Oct 25, 2007 at 09:27 PM.
Registered User
Joined: Jun 2006
Posts: 267
Likes: 0
From: Seattle, WA
Surfaces need to wear, as as the metals get used to each other. Maybe if engines were made of Samuel L.'s Unobtainium by perfect machines this wouldn't be necessary, but in the real world it is a vital step. I imagine for a rotary the apex seals, port entries, and housing surface are the biggest need-to-wear parts.
Registered
Joined: Oct 2005
Posts: 89
Likes: 0
i started with royal purple @ 5K miles. Ran great. At 15K miles, the tire dealer was rotating my tires and changed my oil without being asked. Pissed me off bigtime, because I 'd just changed it myself.
So I've been running 5w20 semi synth since, and I tell you it runs like crap compared to what it did with the RP. I'm at 20K now and I just bought some RP 5w20 and can't wait to get it back in there. I changed it at 17.5 with conventional but I'm done with it. The RP is WELL WORTH every penny.
The whole synth is bad routine really pisses me off. It's just Mazda NA looking for a scapegoat when **** happens. If my car is running better with the RP, then I'm using it.
Not to mention RP on their own website recommends their oil for rotaries.
So if they're wrong, sue them.
They aren't wrong. RP rocks.
So I've been running 5w20 semi synth since, and I tell you it runs like crap compared to what it did with the RP. I'm at 20K now and I just bought some RP 5w20 and can't wait to get it back in there. I changed it at 17.5 with conventional but I'm done with it. The RP is WELL WORTH every penny.
The whole synth is bad routine really pisses me off. It's just Mazda NA looking for a scapegoat when **** happens. If my car is running better with the RP, then I'm using it.
Not to mention RP on their own website recommends their oil for rotaries.
So if they're wrong, sue them.
They aren't wrong. RP rocks.
i started with royal purple @ 5K miles. Ran great. At 15K miles, the tire dealer was rotating my tires and changed my oil without being asked. Pissed me off bigtime, because I 'd just changed it myself.
So I've been running 5w20 semi synth since, and I tell you it runs like crap compared to what it did with the RP. I'm at 20K now and I just bought some RP 5w20 and can't wait to get it back in there. I changed it at 17.5 with conventional but I'm done with it. The RP is WELL WORTH every penny.
The whole synth is bad routine really pisses me off. It's just Mazda NA looking for a scapegoat when **** happens. If my car is running better with the RP, then I'm using it.
Not to mention RP on their own website recommends their oil for rotaries.
So if they're wrong, sue them.
They aren't wrong. RP rocks.
So I've been running 5w20 semi synth since, and I tell you it runs like crap compared to what it did with the RP. I'm at 20K now and I just bought some RP 5w20 and can't wait to get it back in there. I changed it at 17.5 with conventional but I'm done with it. The RP is WELL WORTH every penny.
The whole synth is bad routine really pisses me off. It's just Mazda NA looking for a scapegoat when **** happens. If my car is running better with the RP, then I'm using it.
Not to mention RP on their own website recommends their oil for rotaries.
So if they're wrong, sue them.
They aren't wrong. RP rocks.
but since *then*, Mazda changed the O ring material, and Compare our Synthetic oil now to Synthetic oil from 30 years ago just .... aint right.
This *Anti-Synthetic* thing is just stupid IMO, people have their freedom to use whatever they want, if it works for them, why are people bitching. I just dont get it.
I've been using RP for so long, damn my engine is running strong. Yikes !!!! and will continue to do so till my MSP blows up. Will see how many miles would that be.
Last edited by nycgps; Dec 22, 2007 at 11:03 PM.
Hmmmmmm.........
Joined: Mar 2005
Posts: 3,564
Likes: 6
From: Melbourne, Australia
ok lol at that last statement and a question. How would something like this castor based oil go in a rotary engine http://www.penriteoil.com.au/files/T...RACECASTOR.pdf.. Its ashless, designed to be burnt and used in high "Speed" engines.
Only downside I see is the 20W rating.
Cheers
Andrew
Only downside I see is the 20W rating.
Cheers
Andrew
3-wheeler
Joined: Dec 2005
Posts: 2,734
Likes: 1
From: Phoenix
I know I'm only one person but I've ran synthetic oil since 6,000 miles on my 05 and have only receintly switched to Idemitsu 10w-30 as my standard motor oil.
I have been running RP 5w-30 since 6,000 miles however and my last compression test was at 41,000 miles. Current milage is 43,000
Rotor #1: Test 1: 8.9, 9.3, 8.7 @ 296
Rotor #2: Test 1: 9.4, 9.1, 9.3 @ 291
I've also been premixing for about the past 10,000 miles on the vehicle.
Like I said, one car but so far I've been happy with the results!
I have been running RP 5w-30 since 6,000 miles however and my last compression test was at 41,000 miles. Current milage is 43,000
Rotor #1: Test 1: 8.9, 9.3, 8.7 @ 296
Rotor #2: Test 1: 9.4, 9.1, 9.3 @ 291
I've also been premixing for about the past 10,000 miles on the vehicle.
Like I said, one car but so far I've been happy with the results!
Last edited by Flashwing; Dec 29, 2007 at 09:52 AM. Reason: Cause
I don't buy Kool-Aid
Joined: Apr 2004
Posts: 8,823
Likes: 2
From: Vegas Baby!
Hi guys! I'm new to this RP stuff. I went to wallmart only to find 10W-30, Will my baby be ok if I use this oil weight? Thats all I could find there.
I have a request, Can the guys that have are using RP post how long you have been using RP and what weight?
Also, I was told my a great source who asked and was told by a greater source that synthetic oil dont cool like conventional oil and in time your engine will go, Is that true? I have 57K and I'm on my 2nd engine. I just want to do all the right things to keep my baby running happy
Thanks a million,
-Gil
I have a request, Can the guys that have are using RP post how long you have been using RP and what weight?
Also, I was told my a great source who asked and was told by a greater source that synthetic oil dont cool like conventional oil and in time your engine will go, Is that true? I have 57K and I'm on my 2nd engine. I just want to do all the right things to keep my baby running happy
Thanks a million,
-Gil
