mixing 10w30 and 5w30
#1
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mixing 10w30 and 5w30
hello all!
while changing the oil this eve, i realized i only had 3 qts of 10w30, but a case of 5w30.
Unfortunately, i realized this after i added those 3 10w30 qts. any issues with mixing the weight, and using 1 qt of the 5w30.
I did a search on the forum and came up emty.
thanks in advance
eric
while changing the oil this eve, i realized i only had 3 qts of 10w30, but a case of 5w30.
Unfortunately, i realized this after i added those 3 10w30 qts. any issues with mixing the weight, and using 1 qt of the 5w30.
I did a search on the forum and came up emty.
thanks in advance
eric
#5
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Originally Posted by FormulaRX
but isn't 5w30 a little too thin for the 13B??? Just my reasoning since so many others seem to use 20w50
https://www.rx7club.com/3rd-generation-specific-1993-2002-16/going-synthetic-quick-questions-synthetic-guys-411254/
You can read and decide for yourself.
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Originally Posted by FormulaRX
but isn't 5w30 a little too thin for the 13B??? Just my reasoning since so many others seem to use 20w50
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fuel dilution and blowby rapidly degrades oil in these cars...the same guys who wrote the FSM prob also designed the AST
my next mission after I get the car back on the road is to do a lab viscosity analysis after 2,000 hard street miles on 15w-50 Mobil 1 and put this issue to bed
my next mission after I get the car back on the road is to do a lab viscosity analysis after 2,000 hard street miles on 15w-50 Mobil 1 and put this issue to bed
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#10
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Originally Posted by Two Stroke FD
got a link?
A quote:
Originally Posted by turbojeff
I bought my 93 R1 with 36K miles. Oil has always smelled like gas. I doubt the motor was worn out with only 36K. I've sent 4 different samples to Southwest Spectro Chemical for analysis, 10% fuel dilution everytime.
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that there is significant viscosity loss after 2,000 miles, relative to new oil of the same grade and brand name
when I say "significant" I mean 10-20% or more
edit: ASTM D-445 and D-4683, as defined here
http://www.performanceoiltechnology....anttesting.htm
when I say "significant" I mean 10-20% or more
edit: ASTM D-445 and D-4683, as defined here
http://www.performanceoiltechnology....anttesting.htm
Last edited by Two Stroke FD; 07-27-05 at 11:48 PM.
#14
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Originally Posted by Two Stroke FD
that there is significant viscosity loss after 2,000 miles, relative to new oil of the same grade and brand name
when I say "significant" I mean 10-20% or more
edit: ASTM D-445 and D-4683, as defined here
http://www.performanceoiltechnology....anttesting.htm
when I say "significant" I mean 10-20% or more
edit: ASTM D-445 and D-4683, as defined here
http://www.performanceoiltechnology....anttesting.htm
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"last longer" is subjective I suppose
let's say "maintain acceptable viscosity"....also subjective...bottom line is I would like to show that turbocharged rotary engines are brutal on motor oil, compared to a high performance piston engine
let's say "maintain acceptable viscosity"....also subjective...bottom line is I would like to show that turbocharged rotary engines are brutal on motor oil, compared to a high performance piston engine
#16
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Originally Posted by Two Stroke FD
"last longer" is subjective I suppose
let's say "maintain acceptable viscosity"....also subjective...bottom line is I would like to show that turbocharged rotary engines are brutal on motor oil, compared to a high performance piston engine
let's say "maintain acceptable viscosity"....also subjective...bottom line is I would like to show that turbocharged rotary engines are brutal on motor oil, compared to a high performance piston engine
For instance, running a heavier weight in conditions where it will never reach optimum temperature probably removes any benefits of it not shearing.
#18
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Originally Posted by Two Stroke FD
what is "optimum temperature"?
I've never heard of these engines having a problem running too cool
I've never heard of these engines having a problem running too cool
i.e. if the oil doesn't reach a good lubricating temperature, you are increasing the wear on your engine and other lubricated parts (not to mention the tough time the engine has pumping it through giving worse gas mileage).
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true, but even in "cold" ambient conditions, these engines reach operating temps (i.e. 180 F) FAST...the amount of time spent at "low" temperature is very limited unless you drive the car 4 miles every day and park it (which is not me, I always drive the car hard, once warmed up, and for at least 30 minutes)
#20
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Originally Posted by Two Stroke FD
true, but even in "cold" ambient conditions, these engines reach operating temps (i.e. 180 F) FAST...the amount of time spent at "low" temperature is very limited unless you drive the car 4 miles every day and park it (which is not me, I always drive the car hard, once warmed up, and for at least 30 minutes)
If they are going to be driving the car under conditions that make sense for something heavier, then it makes sense (ex. I run 20w50 for track days).
#22
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Originally Posted by rlee429
I thought the W in 10w-30 meant winter. Meaning that 20w-50 would flow 2x? slower then 10w-30 at winter tempetures and flow 2ishx? slower then 10w-30 at operational tempeture.
However, given the fuel dillution problem of rotary engines, I still wouldn't recommend holding onto oil for too long regardless of the viscosity being used.
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Originally Posted by Mahjik
However, given the fuel dillution problem of rotary engines, I still wouldn't recommend holding onto oil for too long regardless of the viscosity being used.
it wouldn't surprise me to see 10% fuel dilution within several hundred miles
these engines are seriously flawed in many ways, but they are fun
#25
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Originally Posted by 2ZZ-GE
2k miles is "too long"?
Saying "change your oil at XXXX" isn't really the proper things to say, IMO, as whatever number you pick won't work for everyone.