5-20 or 5-30w oil? will it really help? or?
08-14-2011, 02:34 PM
#2
https://www.rx8club.com/series-i-tech-garage-22/cumulative-synthetic-oil-discussion-52856/
08-14-2011, 10:25 PM
#4
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There's like a million threads on this..
But i use 5w-30 non-synthetic and i use 4 ounces of Marvel Mystery Oil (MMO) every fill up. I live in utah where it gets pretty dang hot in the summer so the 5w-20 will thin out a lot easier than a heavier weight. Atleast thats i interpret. Check out this thread on premixing.
Page 39, 3/4 of the way down the page.
*Edit* And by every fill up i mean, when i fill up when my gas refill light comes on. So pretty much add 4 oz of MMO to 13 gallons of premium gas.
But i use 5w-30 non-synthetic and i use 4 ounces of Marvel Mystery Oil (MMO) every fill up. I live in utah where it gets pretty dang hot in the summer so the 5w-20 will thin out a lot easier than a heavier weight. Atleast thats i interpret. Check out this thread on premixing.
Page 39, 3/4 of the way down the page.
*Edit* And by every fill up i mean, when i fill up when my gas refill light comes on. So pretty much add 4 oz of MMO to 13 gallons of premium gas.
Last edited by atwood_101; 08-14-2011 at 10:26 PM. Reason: More detailed response
08-14-2011, 10:50 PM
#5
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Just remember that ambient temperatures outside have nothing to do with your choice of oil. The only temperature that matters with oil choice is the temperature of the oil itself.
Your car controls your engine temperature via a thermostat which is designed to keep it at an average operational temperature. Typically, your engine will operate at the same temperature whether it's 32 degrees outside or 100 degrees.
Ambient temperatures can sometimes cause slight rises in engine operational temperature because you exceed the cooling capability of the system under certain conditions like idling, traffic, or sometimes even city driving. Even in Arizona where we see 115 degrees during the summer I rarely see more than a 5 to 10 degree variant in oil temperature while cruising on the highway.
That all being said, you can't make good choices about your oil temps without knowing what your oil temperatures actually are. Most people who run heavier weight oils (40wt and above) do so without knowing why they are doing it but only because someone told them to do so.
Many RX8 owners compromise and run a 5w-30 weight since the 5w-20 seems to have been chosen by Mazda due to fuel mileage. A 5w-30 with your choice of brand will do just fine.
Your car controls your engine temperature via a thermostat which is designed to keep it at an average operational temperature. Typically, your engine will operate at the same temperature whether it's 32 degrees outside or 100 degrees.
Ambient temperatures can sometimes cause slight rises in engine operational temperature because you exceed the cooling capability of the system under certain conditions like idling, traffic, or sometimes even city driving. Even in Arizona where we see 115 degrees during the summer I rarely see more than a 5 to 10 degree variant in oil temperature while cruising on the highway.
That all being said, you can't make good choices about your oil temps without knowing what your oil temperatures actually are. Most people who run heavier weight oils (40wt and above) do so without knowing why they are doing it but only because someone told them to do so.
Many RX8 owners compromise and run a 5w-30 weight since the 5w-20 seems to have been chosen by Mazda due to fuel mileage. A 5w-30 with your choice of brand will do just fine.
08-15-2011, 08:37 AM
#6
Premixing and heavier oil in the crankcase have almost nothing to do with one another. Thicker oil means that the oil pressure bypass opens earlier *reducing* flow volume at higher rpm's compared with 5w-20. 5w-30 or 10w-30 is probably okay with improved oil characteristics over 5w-20, but I wouldn't go heavier than that without installing Mazmart's oil pressure mod kit.
08-15-2011, 06:46 PM
#8
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Just remember that ambient temperatures outside have nothing to do with your choice of oil. The only temperature that matters with oil choice is the temperature of the oil itself.
Your car controls your engine temperature via a thermostat which is designed to keep it at an average operational temperature. Typically, your engine will operate at the same temperature whether it's 32 degrees outside or 100 degrees.
Ambient temperatures can sometimes cause slight rises in engine operational temperature because you exceed the cooling capability of the system under certain conditions like idling, traffic, or sometimes even city driving. Even in Arizona where we see 115 degrees during the summer I rarely see more than a 5 to 10 degree variant in oil temperature while cruising on the highway.
That all being said, you can't make good choices about your oil temps without knowing what your oil temperatures actually are. Most people who run heavier weight oils (40wt and above) do so without knowing why they are doing it but only because someone told them to do so.
Many RX8 owners compromise and run a 5w-30 weight since the 5w-20 seems to have been chosen by Mazda due to fuel mileage. A 5w-30 with your choice of brand will do just fine.
Your car controls your engine temperature via a thermostat which is designed to keep it at an average operational temperature. Typically, your engine will operate at the same temperature whether it's 32 degrees outside or 100 degrees.
Ambient temperatures can sometimes cause slight rises in engine operational temperature because you exceed the cooling capability of the system under certain conditions like idling, traffic, or sometimes even city driving. Even in Arizona where we see 115 degrees during the summer I rarely see more than a 5 to 10 degree variant in oil temperature while cruising on the highway.
That all being said, you can't make good choices about your oil temps without knowing what your oil temperatures actually are. Most people who run heavier weight oils (40wt and above) do so without knowing why they are doing it but only because someone told them to do so.
Many RX8 owners compromise and run a 5w-30 weight since the 5w-20 seems to have been chosen by Mazda due to fuel mileage. A 5w-30 with your choice of brand will do just fine.
08-15-2011, 06:49 PM
#9
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There's like a million threads on this..
But i use 5w-30 non-synthetic and i use 4 ounces of Marvel Mystery Oil (MMO) every fill up. I live in utah where it gets pretty dang hot in the summer so the 5w-20 will thin out a lot easier than a heavier weight. Atleast thats i interpret. Check out this thread on premixing.
Page 39, 3/4 of the way down the page.
*Edit* And by every fill up i mean, when i fill up when my gas refill light comes on. So pretty much add 4 oz of MMO to 13 gallons of premium gas.
But i use 5w-30 non-synthetic and i use 4 ounces of Marvel Mystery Oil (MMO) every fill up. I live in utah where it gets pretty dang hot in the summer so the 5w-20 will thin out a lot easier than a heavier weight. Atleast thats i interpret. Check out this thread on premixing.
Page 39, 3/4 of the way down the page.
*Edit* And by every fill up i mean, when i fill up when my gas refill light comes on. So pretty much add 4 oz of MMO to 13 gallons of premium gas.
08-15-2011, 07:59 PM
#11
Aug 11' rc
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Thanks Al, so the premix is to solve the seal problems I had with engine one? My free engine in Aug. 2009 from Mazda warranty has 25k on it now with no problems, just the engine light goes on for a few days after redline... then is off for a month or more. I'm enjoying, yet wonder when it will self-destruct?
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