oil report results
05-12-2009, 04:58 PM
#52
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Found my oil!
Just got the results back for Shell Rotella 15W-40. I am liking what I am seeing. Wear stayed about the same (has been good no matter what oil I used). The major advantage I see with this oil is that the viscosity actually stayed in range!!! That is a first for any oil I've used.
To me for a low priced conventional oil I couldn't ask for anything else from it. Also this sample still has a lot of the Castrol from the last change. One way you can tell is the Moly is reading 23 and from what I read virgin Rotella has 0 Moly. So I am leaving about 1/3 used oil each change (to be expected).
I have hopes my next analysis of Shell will be even stronger. We shall see. I hope these results have been helpful to people to make their own conclusions.
Granted since Rotella only comes in 15W-40 it is only rated for around 0F from what I read, but in Maryland I figure this should be fine.
For now I am calling Rotella my oil of choice.
To me for a low priced conventional oil I couldn't ask for anything else from it. Also this sample still has a lot of the Castrol from the last change. One way you can tell is the Moly is reading 23 and from what I read virgin Rotella has 0 Moly. So I am leaving about 1/3 used oil each change (to be expected).
I have hopes my next analysis of Shell will be even stronger. We shall see. I hope these results have been helpful to people to make their own conclusions.
Granted since Rotella only comes in 15W-40 it is only rated for around 0F from what I read, but in Maryland I figure this should be fine.
For now I am calling Rotella my oil of choice.
05-23-2014, 10:26 PM
#53
New Member
You definitely need to stick with at least 3000 mile OCIs as your Iron and Chromium wear metals are reading higher than they should - 5000 miles is too long IMHO since we have partial oil changes. I am currently doing 2500 mile OCIs.
Part of this increased wear is due to high fuel dilution (1.3%, I know it says less that 2% is OK, but that is just not true, anything over 1% is bad) - which lowers the viscosity of the oil and reduces the anti-wear effectiveness of the oil.
I also agree with use of an xW30 oil, possibly even an xW40 in the hot part of the summer.
For the rotary, it is much more important to change the oil very often as there is nothing you can do to stop the fuel dilution caused by the rich fuel mixture - except to change it often to get it out.
I think a short OCI is more important than the use of synthetics, although if you can afford it, both are beneficial for a long engine life.
Also, these Oil Analysis will not tell you anything about the Apex and Side Seal wear as these particles are blown out the exhaust - you should continue to premix as well to supplement the OMP oil - I recommend MMO as a good "one stop" additional Lube and Cleaner or you could se Idemitsu Rotary Premix, FP Plus, Lucas UCL, to add some lubricity and cleaning that is much needed.
Hope this helps.
Part of this increased wear is due to high fuel dilution (1.3%, I know it says less that 2% is OK, but that is just not true, anything over 1% is bad) - which lowers the viscosity of the oil and reduces the anti-wear effectiveness of the oil.
I also agree with use of an xW30 oil, possibly even an xW40 in the hot part of the summer.
For the rotary, it is much more important to change the oil very often as there is nothing you can do to stop the fuel dilution caused by the rich fuel mixture - except to change it often to get it out.
I think a short OCI is more important than the use of synthetics, although if you can afford it, both are beneficial for a long engine life.
Also, these Oil Analysis will not tell you anything about the Apex and Side Seal wear as these particles are blown out the exhaust - you should continue to premix as well to supplement the OMP oil - I recommend MMO as a good "one stop" additional Lube and Cleaner or you could se Idemitsu Rotary Premix, FP Plus, Lucas UCL, to add some lubricity and cleaning that is much needed.
Hope this helps.
09-14-2016, 09:08 PM
#56
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new rx8 owner
best oil for Maine(cold weather)... i am buying an Rx8 with 60K I've had a compression test and it passed 100. I've test run this on back roads and hwy. Clutch is NICE, Steering is tight. Looking to baby this baby. Bought extended bumper to bumper but don't want to use it. Looking for advice and tips. I have loved these cars since i saw one in 2006 at a stop light and I acted like I wanted to race. Needless to say my Toyota was not even in its rearview after 3 seconds.
I have taken my time and feel this one is in the condition that best suits owning a used RX8.
I have taken my time and feel this one is in the condition that best suits owning a used RX8.
09-20-2016, 03:12 PM
#63
SARX Legend
iTrader: (46)
Just normal rotary BS but mainly because of modifications and the issue they bring on terms of reliability. But the last 5 years have been the most reliable actually even being turbocharged. But it came at a cost
Would I do it all over again? Yes, yes I would.
10-21-2016, 11:07 PM
#64
6 rotors....I want more!
Plenty studies show Wicks SP Oil filters are the best.
After learning about its characteristics and place in the study I decided to use them in my cars.
As for oil,been using Royal Purple for years and always excellent performance. I do oil changes every 3 to 4 K.
After visiting MazdaTrix decided on buying a case of Idemitsu Oil which is made specially for the Rotary engine.
Costs as much as the Royal Purple brand so I am not cutting an arm in order to use it.
This Oil is recommended by rotary engine racers and it is made for rotary engines. You know, our cars use Oil to lube seals so some fuel and oil interaction is happening that does not happen in piston motors.
Also, this Oil is not an oil made for 2 stroke engines, it is made for Wankel engines.
2 stroke engines may have some combustion similarities to a Wankel but by no means same degree or concentration, as well as seals versus metal rings.
Royal Purple works great. A happy long time client. Now trying Idemitsu brand. ��
After learning about its characteristics and place in the study I decided to use them in my cars.
As for oil,been using Royal Purple for years and always excellent performance. I do oil changes every 3 to 4 K.
After visiting MazdaTrix decided on buying a case of Idemitsu Oil which is made specially for the Rotary engine.
Costs as much as the Royal Purple brand so I am not cutting an arm in order to use it.
This Oil is recommended by rotary engine racers and it is made for rotary engines. You know, our cars use Oil to lube seals so some fuel and oil interaction is happening that does not happen in piston motors.
Also, this Oil is not an oil made for 2 stroke engines, it is made for Wankel engines.
2 stroke engines may have some combustion similarities to a Wankel but by no means same degree or concentration, as well as seals versus metal rings.
Royal Purple works great. A happy long time client. Now trying Idemitsu brand. ��
Last edited by jaimesix; 11-22-2016 at 08:31 AM.
11-21-2016, 09:00 PM
#65
///// Upscale Zoom-Zoom
Shell Rotella T 15W40 non-synthetic diesel oil is great stuff for non-catalytic converter vehicles like motorcycles (and cat deleted rotaries). The issue in running Rotella 15W40 (non-synthetic) is that the higher levels of Zinc (as ZDDP) will improve wear but inactivate your catalyst sites in your catalytic converter much faster (what that leads to for buildup I haven't a clue). The sneaky US EPA made oil producers reduce the ZDDP levels in SM and SN rated oil to improve smog at the cost of your engine life and reliability (wear). I use Rotella T in my motorcycles just not in any of my cars for now while the cat is doing its job (no MIL lights for me).
11-21-2016, 09:17 PM
#66
Water Foul
Plenty studies show Wicks SP Oil filters are the best.
After learning about its characteristics and place in the study I decided to use them in my cars.
As for oil,been using Royal Purple for years and always excellent performance. I do oil changes every 3 to 4 K.
After visiting MazdaTrix decided on buying a case of Idemitsu Oil which is made specially for the Rotary engine.
Costs as much as the Royal Purple brand so I am not cutting an arm in order to use it.
This Oil is recommended by rotary engine racers and it is made for rotary engines. You know, our cars use Oil to lube seals so some fuel and oil interaction is happening that does not happen in piston motors.
Also it is not an engine made for 2 stroke engines, it is made for Wankel engines.
2 stroke engines may have some combustion similarities to a Wankel but by no means same degree or concentration, as well as seals versus metal rings.
Royal Purple works great. A happy long time client. Now trying Idemitsu brand. ��
After learning about its characteristics and place in the study I decided to use them in my cars.
As for oil,been using Royal Purple for years and always excellent performance. I do oil changes every 3 to 4 K.
After visiting MazdaTrix decided on buying a case of Idemitsu Oil which is made specially for the Rotary engine.
Costs as much as the Royal Purple brand so I am not cutting an arm in order to use it.
This Oil is recommended by rotary engine racers and it is made for rotary engines. You know, our cars use Oil to lube seals so some fuel and oil interaction is happening that does not happen in piston motors.
Also it is not an engine made for 2 stroke engines, it is made for Wankel engines.
2 stroke engines may have some combustion similarities to a Wankel but by no means same degree or concentration, as well as seals versus metal rings.
Royal Purple works great. A happy long time client. Now trying Idemitsu brand. ��
11-21-2016, 10:31 PM
#67
11-22-2016, 08:39 AM
#68
6 rotors....I want more!
Like said before I swapped over to the oil brand marketed by MazdaTrix.
But in fairness Royal Purple has done an excellent job on my rotary. An RX8 07. Got this RX new. Using RP and changing oil every 3-4K.
Never an issue. Never temp raises. Great throttle response. The 2 smog checks my car had to pass (2012 & 2014) passed with A+ numbers.
At about 70K took it to the dealer for assessment and tuneup. Been a great car and wanted to corroborate it. I was told this was the cleanest and smoothest Renesis they have seen enginewise. Compression was excellent and mileage did not show at all on wear. Less wear for the mileage.
So this would be my "live" test. I can only say that "on the field live test" showed me Royal Purple is great. At least to rotaries. I did not use it in my piston engines.
11-23-2016, 08:21 AM
#69
Water Foul
It probably isn't the RP oil itself that served you well, but the interval at which you changed it. If the oil wars taught us nothing else, changing your oil frequently is what matters most to this engine.
As for RP's performance in used oil analysis, 30 weight oil was shearing all the way down to 10W in only 5000 miles. When asked about it, RP went so far as to accuse the users of lying about what oil they had tested. Eventually, their own tests confirmed the results.
Here's an anecdotal aside. I have a membership at the local road track, and I am there at least 1 weekend per month. Track rats of all stripes pass through there with all kinds of cars. There is not a drop of RP motor oil in sight there ever, with one single exception. The Porsche/Ferrari/Lamborghini guy who purchased the entire accessory store at the dealership and comes decked out head to toe in his Porsche/Ferarri/Lamborghini outfit (but can't actually drive) uses RP motor oil and is sure to let everyone know. Otherwise, no one uses the stuff. There must be a reason.
As for RP's performance in used oil analysis, 30 weight oil was shearing all the way down to 10W in only 5000 miles. When asked about it, RP went so far as to accuse the users of lying about what oil they had tested. Eventually, their own tests confirmed the results.
Here's an anecdotal aside. I have a membership at the local road track, and I am there at least 1 weekend per month. Track rats of all stripes pass through there with all kinds of cars. There is not a drop of RP motor oil in sight there ever, with one single exception. The Porsche/Ferrari/Lamborghini guy who purchased the entire accessory store at the dealership and comes decked out head to toe in his Porsche/Ferarri/Lamborghini outfit (but can't actually drive) uses RP motor oil and is sure to let everyone know. Otherwise, no one uses the stuff. There must be a reason.
11-23-2016, 11:26 AM
#70
SARX Legend
iTrader: (46)
At about 70K took it to the dealer for assessment and tuneup. Been a great car and wanted to corroborate it. I was told this was the cleanest and smoothest Renesis they have seen enginewise. Compression was excellent and mileage did not show at all on wear. Less wear for the mileage.
11-23-2016, 12:59 PM
#71
6 rotors....I want more!
It probably isn't the RP oil itself that served you well, but the interval at which you changed it. If the oil wars taught us nothing else, changing your oil frequently is what matters most to this engine.
As for RP's performance in used oil analysis, 30 weight oil was shearing all the way down to 10W in only 5000 miles. When asked about it, RP went so far as to accuse the users of lying about what oil they had tested. Eventually, their own tests confirmed the results.
Here's an anecdotal aside. I have a membership at the local road track, and I am there at least 1 weekend per month. Track rats of all stripes pass through there with all kinds of cars. There is not a drop of RP motor oil in sight there ever, with one single exception. The Porsche/Ferrari/Lamborghini guy who purchased the entire accessory store at the dealership and comes decked out head to toe in his Porsche/Ferarri/Lamborghini outfit (but can't actually drive) uses RP motor oil and is sure to let everyone know. Otherwise, no one uses the stuff. There must be a reason.
As for RP's performance in used oil analysis, 30 weight oil was shearing all the way down to 10W in only 5000 miles. When asked about it, RP went so far as to accuse the users of lying about what oil they had tested. Eventually, their own tests confirmed the results.
Here's an anecdotal aside. I have a membership at the local road track, and I am there at least 1 weekend per month. Track rats of all stripes pass through there with all kinds of cars. There is not a drop of RP motor oil in sight there ever, with one single exception. The Porsche/Ferrari/Lamborghini guy who purchased the entire accessory store at the dealership and comes decked out head to toe in his Porsche/Ferarri/Lamborghini outfit (but can't actually drive) uses RP motor oil and is sure to let everyone know. Otherwise, no one uses the stuff. There must be a reason.
Hey Steve.
I hear you. Perhaps a combination of both. Interval oil change and perhaps the oil is good quality but it only breaks down sooner than other oils comparable.
So I may have been able to use this brand oil during its peak performance duration never to learn what happens upon its breakdown.
I believe that must be, otherwise, if going bad from mile one, detrimental effects may have shown.
That is funny though, the Ferrari-Porsche even BMW guys......yes....seen them at Willow Springs (CA) Show off is their main reason to be there.
9kpmrx8.
Thank you for your comments. I do not know what to do with them. But I will leave it as is.
Happy Thanksgiving to all My RX8 for sure got its Thanksgiving present.....after all this miles a much deserved Ohlin DFV set up.....paid today
12-03-2016, 11:56 AM
#72
6 rotors....I want more!
I keep reading same reviews.
Royal Purple being a great oil. Proven to be great. Read this posts from a Mustang forum. With photos.
What they also seem to say is that being great oil, seems to break down faster under heat, under hard driving.
So I give credence to those claiming bad results with it if they went over by thousands of miles on oil changes, or if they drove hard with high engine temps for long w/o oil changing.
Competition cars on Royal Purple seem to change oilo more often avoiding perhaps that issue.
That is probably what happened to my car as well. Timely oil changes and the times I went to Willow Springs, I would always change my oil upon getting home.
Nothing beats good sense.
Royal Purple Oil Experience - 2005 Mustang GT - Forums at Modded Mustangs
Royal Purple being a great oil. Proven to be great. Read this posts from a Mustang forum. With photos.
What they also seem to say is that being great oil, seems to break down faster under heat, under hard driving.
So I give credence to those claiming bad results with it if they went over by thousands of miles on oil changes, or if they drove hard with high engine temps for long w/o oil changing.
Competition cars on Royal Purple seem to change oilo more often avoiding perhaps that issue.
That is probably what happened to my car as well. Timely oil changes and the times I went to Willow Springs, I would always change my oil upon getting home.
Nothing beats good sense.
Royal Purple Oil Experience - 2005 Mustang GT - Forums at Modded Mustangs
12-03-2016, 02:11 PM
#73
SARX Legend
iTrader: (46)
You can't compare results from the Mustang Community in the RX-8 world.
Paimon (mod here who had his RP tested by RP to confirm) did not have high mileage on the oil and only autocrossed lightly and lives up east where it is cool.
It's not magic, an oil analysis is what it is. Engines are different and in my Turbo Renesis I get a lot of fuel in the oil and Mobil1 seems to stand up to that without losing too much viscocity. My buddy ran RP, swore by it even and then when we sent a sample at only a 2000 OIC it was doing worse than my Mobil1 0W-40 was at a 3500 mile OIC.
That combined with Paimon's and others UOA's here, was enough to convince me. Not to mention that until recently RP wasn't API certified. All hype as far as I am concerned.
Is RP bad? No, it's just not a high quality oil like it is advertised to be so it's not worth the boutique oil price.
If you like it, run it. Then test it and share the report.
And I'm not saying Mobil1 is the best oil available, it's just a good group IV oil that is regularly available and often at a discount. Redline and Amsoil make "better" Group V oils.
Paimon (mod here who had his RP tested by RP to confirm) did not have high mileage on the oil and only autocrossed lightly and lives up east where it is cool.
It's not magic, an oil analysis is what it is. Engines are different and in my Turbo Renesis I get a lot of fuel in the oil and Mobil1 seems to stand up to that without losing too much viscocity. My buddy ran RP, swore by it even and then when we sent a sample at only a 2000 OIC it was doing worse than my Mobil1 0W-40 was at a 3500 mile OIC.
That combined with Paimon's and others UOA's here, was enough to convince me. Not to mention that until recently RP wasn't API certified. All hype as far as I am concerned.
Is RP bad? No, it's just not a high quality oil like it is advertised to be so it's not worth the boutique oil price.
If you like it, run it. Then test it and share the report.
And I'm not saying Mobil1 is the best oil available, it's just a good group IV oil that is regularly available and often at a discount. Redline and Amsoil make "better" Group V oils.
Last edited by 9krpmrx8; 12-03-2016 at 02:18 PM.
12-03-2016, 08:20 PM
#74
6 rotors....I want more!
I never compared a rotary engine to a piston engine.
What I show is evidence that RP is no bad oil.
Life of the oil is shorter, it seems, that indicates this oil should be changed at short intervals without delay like I did.
Nobody told me nor had to read anything to arrive to that conclusion, I show results from my own Mazda RX8 which I have since new.
I suggest, from what you just said, you need only use IDEMITSU oil which is made for Rotary Engines.
What I show is evidence that RP is no bad oil.
Life of the oil is shorter, it seems, that indicates this oil should be changed at short intervals without delay like I did.
Nobody told me nor had to read anything to arrive to that conclusion, I show results from my own Mazda RX8 which I have since new.
I suggest, from what you just said, you need only use IDEMITSU oil which is made for Rotary Engines.
12-03-2016, 09:44 PM
#75
SARX Legend
iTrader: (46)
It's not bad oil, it's just on par with oils that cost half the price so what's the point of spending the money and running it?
Idemitsu 5W-40 fully synthetic would be fine, but it's not made for a rotary, it's just a decent fully synthetic. And it's probably a pain in the *** to get.
Idemitsu 5W-40 fully synthetic would be fine, but it's not made for a rotary, it's just a decent fully synthetic. And it's probably a pain in the *** to get.