Yes I seem to remember something along those lines. Gotta be something like a 0w8 for qualifying and then like you mentioned something thicker for the actual race.
CAFE Standards in the US and Oil Grades
- Thread starter johdirt784
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MolaKule
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My limited information is that NASCAR Sprint Cup engines use an oil with an 8.5 to 9.5 cSt@100C kinematic viscosity
while NASCAR Pro Stock uses an oil with a 4.5 cSt@100C viscosity.
Nascar Pro Stock engine oil cooling systems keep the oil temps to down around 45C while NASCAR Sprint Cup engines run at about 105C.
while NASCAR Pro Stock uses an oil with a 4.5 cSt@100C viscosity.
Nascar Pro Stock engine oil cooling systems keep the oil temps to down around 45C while NASCAR Sprint Cup engines run at about 105C.
Qualifying engines are sacrificial. As long as it makes it a few qualifying laps it's done it's job.
That changed several years ago. They have to run the race with the same engine they qualified with.
Nascar Pro stocks are street stock type cars. Wet sump with an oil cooler if wanted. They run oil temps ALOT hotter than 113*F.
The 602 crate is an approved engine and GM wants 15w-50 in it. Oil temp in that engine usually runs 20*-30* hotter than water temp.
The open engines are about the same.
I thought Pro Stock was for drag racing. Correct me please if I'm wrong.
Im sure many different sanctioning bodies use that name for a class.
I believe the cars may be impounded after qualifying now so the "qualifying oil" may be a thing of the past.
A PCMO 5W-30 that is not either a GF-5/GF-6 type (2.9 minimum and usually 3.05-3.20 ) or an A3 type (3.5 minimum) is extremely rare in the USA.
Some exceptions exist but they are not mainstream products here and usually only available from a vehicle manufacturer or specialist.
Not many vehicles that specify an oil in that middle ground in our market.
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Adds power? Perhaps the better explanation is less parasitic drag, hence a wee bit more power to the wheels?
Doesn't really matter whether you measure at the wheels or flywheel as per SAE, more is more. I don't know of a practical way to measure power prior to all the losses an internal combustion engine experiences if that's what you are alluding to.
You are mixing "yours" API /ILSAC 5w30 with "our" ACEA 5w30..... Dont you?
wemay
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"One also needs to look at how temperatures are being measured. Official NOAA values are excellent. There is no European NOAA i'm aware of. Every country has its own weather agency. And they do not share their data for free like NOAA does. So these weather apps often will take unofficial readings from ill-situated private weather stations. So if you look at weather data on the internet from abroad you will need to take those with more than a grain of salt."
It’s been a long time since I’ve been in school but is Nordkapp a country? Never heard of it.
I hear the roads in East Germany are not very good.
Nordkapp is the northernmost point of Europe....it is in Norway
Yes East Germany....you can definitely feel the difference when you "cross" the border...although border doesnt exist!
But we have harsher roads....to the east!
Was once in Mandok-Hungary (i wont forget that to the rest of my life)
Yes East Germany....you can definitely feel the difference when you "cross" the border...although border doesnt exist!
But we have harsher roads....to the east!
Was once in Mandok-Hungary (i wont forget that to the rest of my life)
Gene, the oil I am referring to has the API starburst so it's not a specialty oil. I believe Valvoline, QSUD and Mobil all produce mainstream engine oils with higher hths that still fall into the RC category. Amsoil OE 5w30 is 3.3 hths API starburst labeled and Resource Conserving, A5/B5. Cheers.
The oils I'm familiar with are rarely above 3.2 HTHS. The only one that came to mind was Castrol Professional. Perhaps I need to broaden my horizons. What would be the M1 that is 3.3 HTHS? EP 5W-30 HM perhaps?
I'd have to look it up Gene. I'll try to get that to you though.
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