Mazda RX8 - WHICH OIL TO USE?!- Igniting a Wildfire!!!

[@ZevIRS]

Basically change your oil regularly and don't go lower than 10w (this was said by many rotary shops due to bearing failures) just change it regularly and don't let your oil degrade with time or heat cycles, premix if you want, but understand that premixing = spirited driving / race track and 93 gas or 98 in Europe.

[@trackstarflash]

So when I had my first RX8 years ago, I never Premixed and only did frequent oil changes with conventional oils. This time after years of researching and looking into parts and modifications and what not, I'm going to go with putting on the Sohn Adaptor to change where there Oil Metering pump pulls oil from. I haven't found anyone talking about oil from the Separated system getting into the Oil Sump. Because adding a Sohn adaptor then separates them completely. You do have Oil from the pan being sent through the Eccentric shaft for bearings and inside the rotors, but in order for the Oil from the Sohn system through the injectors to get into the regular engine oil, you'd have to have a bad seal. The oil metering system doesn't have an oil return line as far as I'm aware of, because the Oil Metering system only squirted oil at certain instances in the rev range, so it isn't a constant pressure that would warrant a return line. So I'd see the benefit of having Clean, Colder oil from the Sohn Adaptor reservoir being used rather than Hot and dirty oil from the oil pan being put into the rotor housing. I'd also go as far to say, this is the application that would work best for the Idemitsu Rotary Oil, because it's specifically formulated, clear and a bit more viscos. The great thing about separating the oil metering with a Sohn Adaptor, is that you can, worry free, use whatever synthetic you'd like in the engine oil. Though, like you said, some synthetics are designed to burn cleaner. I've had lengthy conversations with the Tech Team over at Royal Purple about using their oil in a Rotary application, and they've assured me that using it in a stock application like the RX8 is completely fine. They've had thorough studying via Racing applications using their products and had great success. So I believe you when you said, It burnt clean. :) Anyways, we're constantly learning about how to make these cars better all the time. And the best we can do is research and see what others have done and make our own best judgments. I appreciate your perspective!! Keep up the great work in your hobby!!

[@pv4083]

Thank you. I’m trying to give the future RX8 owners a place on KZbin. Often times folks hate on this car just because they heard some kid with no mechanical experience who heard from another kid say the car is unreliable and trash. When there’s plenty of RX8 owners who’ve had their car for years with no issues. People fear what they don’t understand. After 16 years of owning this car I’m also experimenting. I never premix for all those years. It’s just now that I’m trying to keep the relationship fresh that haha that experimenting with premixing etc. Also check out Penzoil ultra platinum for oil. I used to run Royal purple till KZbin channel Project Farm did an oil test and the results were interesting. Royal purple is good oil but check out his video you might find it helpful Good luck with the car and any new information please share.

[@StefanMailey]

Castrol GTX High mileage. Iv been using it for years on all of my Mazdas. RX8 has 121k on original engine and still runs like new. (gutted cat) Cheap 2 stroke oil in the fuel. 2 or 3 gulps per tank. Good to go! Too many people over think it. I laugh at the RX owners that think you need to run that snake oil Idashitzu oil. lol Just buy a low ash oil. 35years of building 2 stroke motocross bikes, jet-skis and V6 Mercury race outboards.

[@mischiefpwns]

I've had 5 RX8's none of which ever had any kind of engine problems. I also only use this oil 10w-40. It's the best!

[@StefanMailey]

@@mischiefpwns I use 10-30.... 10-40 is mint too!

[@mischiefpwns]

@StefanMailey yea 10w-30 is fine too. I live in a tropical climate so I use the 40 because of that.

[@StefanMailey]

@@mischiefpwns I’m in crappy Canada. 😂

[@carloszamora467]

I think RAD Potential in his premix video mentions how even the Idemitsu stuff tends to settle out when left sitting in the gas tank. Any insight on that front? Did you ever have a situation where you left the 8 sitting not on empty with premix and if so what were the results? Thanks much for all you're doing this channel is becoming an RX-8 starter guide/reference encyclopedia and I hope everyone stays orderly and respectful in the comments.

[@pv4083]

Thank you brother. I’m glad you are finding them useful. I create these videos out of unselfish reasons. I don’t want a channel or subscribers. just want to help fellow RX8 owners. Thanks for the appreciation. I also hope the comments stay respectful. Regarding your question. Yes similar to RAD potential I had the same experience. Even when you don’t leave it on E the oil will settle at the bottom. And since my car sits for weeks at a time I decided to not to premix (unless I know I will be at the track). I actually recorded a video showing how the Idemitsu and Amsoil two stroke oil settles and “mixes” once in the gas tank. I will uploaded in the next couple of days. Is a bit rough but you’ll get the idea. Also keep in mind that premixing will eventually hurt your fuel pump so you’ll have to take that into consideration.

[@carloszamora467]

Heat is the #1 enemy of this engine...besides haters 🤣🤣🤣

[@pv4083]

Hahah

[@dgmdgm7271]

Thanks for your feedback, what do you recommend after a rebuild? use a 5w20 anyway ?

[@pv4083]

Assuming the engine was rebuild to OEM specs I would use 5w30 in the beginning to compensate for the wear in the pressure lubricated parts. Once the engine break in is done and you feel comfortable I would do 5w20 if you are driving accordingly… to the parameters discussed in the video. But Make sure you understand the temperatures and driving styles the engine will see and plan accordingly… As a reference EIGHTLIEN RX8 who holds the current time attack record at Tsukuba at 59..secs gets his engines rebuild by RE Amemiya and he runs 0w30 synthetic.

[@GusArizona22]

A thinner oil flows easier and requires less power from the engine to flow it. Despite the fact that the rotary does not have a crankshaft exposed to the oil pan, it still does have an oil pump and this pump still does require a degree of power to turn. There is also oil flowing into the rotors through the eccentric shaft. A thinner oil will flow through the rotors much easier and faster. The oil is the only way the rotors themselves are cooled. Unlike other engines, oil does provide cooling to the rotary. Almost as much as the coolant. The other thing to think about on the rotary is how well a thinner oil can flow through the very small nozzles of the oil metering system. 5k+ miles, use a good synthetic such as Amsoil or Royal Purple and be done with it. Also a good idea to run premium gas when you premix as it lowers the octane of the gas as well. I do 4-6oz per tank 2 stroke lucas semi sythetic sold at Oreilly or Autozone near me.

[@pv4083]

Thanks for the info

[@mskartxr8]

I dont know if you know but the oil pump witch is putting the oil in the injector s that is not a pump witch is pumping constant it is a Load activete pump it is puting out drops of oil tot galons And it is also not burnig instantly it is first doing lubrication to the motor side walls And two stroke oil in the gastank i use 1 on 450liters of gas it is to protect the middel of the apex seals Have fun driving your rx8

[@mskartxr8]

I have the Sohnadapter instalt it is not in contact whit the normal oil system that is blocked of the 2stroke oil is a compleet systeem that works next the other system only driven by the oilpump axel

[@pv4083]

Thank you for the info

[@pv4083]

Thank you for the info

[@Unmedicated_Moments]

You don't know what you're talking about! I drove my RX8 over a hundred thousand million miles and never changed the oil one time and it still runs perfectly. Haha just kidding, those forum debates are hilarious to read. Thanks for another great video!

[@pv4083]

You took me back to those dark days with your first comment. hahahaha

[@ve2430]

​@@pv4083rx8club!!! That guy teamrx8 is troll numero uno 😂