10w30 or 20w50 Idemitsu
#26
Rotary Enthusiast
#27
Racecar - Formula 2000
The following users liked this post:
Testrun (06-23-24)
#28
And remember that we have turbochargers with journal bearings in a very high heat environment. There’s a lot of good in that video but other/additional factors are in play that differ from a procharger in a piston engine.
Last edited by Sgtblue; 06-24-24 at 05:59 AM.
#30
Rotary Enthusiast
For me this achieved the lowest temps. This is how I came up with my oil. I am in SoFLo l, so we got some heat and I tend to run heavier.
I get what you are saying!
#31
There are othar's (pros) that may think different though. Thats the biggest issue. My builder has been around since the beginning of rotary time. He is primarily a drag racer. He feels straight 40 cannot be beat. PERIOD. I broke my new motor in on the Penzoil 40 and switched to synthetic. (Mazda crated motor and switched out apex seals and got a large SP. I went 20w50. Then started to experiment. 10w30. Watched temps and everything. Ended up with RP 10w30 mixing in a 20w50 and 10w40 mixing in a 20w50.
For me this achieved the lowest temps. This is how I came up with my oil. I am in SoFLo l, so we got some heat and I tend to run heavier.
I get what you are saying!
For me this achieved the lowest temps. This is how I came up with my oil. I am in SoFLo l, so we got some heat and I tend to run heavier.
I get what you are saying!
And drag racers that I build for don't run oil coolers as they're running for so little time or they're on full meth and will never see the 100C that oil viscosity is standardized to. Comparing corner cases like that isn't reasonable.
The fact remains that unless we're talking in the extreme pressure will always trump temperature up until 100C (212F) - after that quality of oils and cooling could be factored in but I've yet to see an instance where I can increase flow by running a lower viscosity cools well enough to offset that same reduction in viscosity.
The following users liked this post:
Testrun (06-24-24)
#32
Rotary Enthusiast
And drag racers that I build for don't run oil coolers as they're running for so little time or they're on full meth and will never see the 100C that oil viscosity is standardized to. Comparing corner cases like that isn't reasonable.
The fact remains that unless we're talking in the extreme pressure will always trump temperature up until 100C (212F) - after that quality of oils and cooling could be factored in but I've yet to see an instance where I can increase flow by running a lower viscosity cools well enough to offset that same reduction in viscosity.
The fact remains that unless we're talking in the extreme pressure will always trump temperature up until 100C (212F) - after that quality of oils and cooling could be factored in but I've yet to see an instance where I can increase flow by running a lower viscosity cools well enough to offset that same reduction in viscosity.
I should mention Pettit....even though I am mad at them lol.
#33
This is a Blackstone Labs oil analysis report for Idemitsu 10w30 after only 2000 miles of street driving in a 60k+ miles RX-8. Notice the viscosity is already below range.
This is an NA Renesis, turbo blow-by and fuel dilution is usually worse. This supports the mindset of using 20W50 in rotaries except for extremely cold weather. I know it's a single point data set but it correlates with others.
This is an NA Renesis, turbo blow-by and fuel dilution is usually worse. This supports the mindset of using 20W50 in rotaries except for extremely cold weather. I know it's a single point data set but it correlates with others.
#34
Eye In The Sky
iTrader: (2)
Join Date: Feb 2001
Location: In A Disfunctional World
Posts: 7,909
Likes: 0
Received 123 Likes
on
72 Posts
How To Reduce Oil/Water Fuel Contamination
Every time I park my car at home after driving the FD:
(1) I remove the Oil cap and
(2) pull out the oil stick so that the rubber seal is not sealing the tube.
This allows some venting of the oil pan and helps remove moisture and gas fumes.
Since I have a garage, I have it vented because this engine venting makes the garage smell of gasoline.
(1) I remove the Oil cap and
(2) pull out the oil stick so that the rubber seal is not sealing the tube.
This allows some venting of the oil pan and helps remove moisture and gas fumes.
Since I have a garage, I have it vented because this engine venting makes the garage smell of gasoline.
The following users liked this post:
Testrun (06-24-24)
The following users liked this post:
neit_jnf (06-25-24)
Thread
Thread Starter
Forum
Replies
Last Post