02impactblue

I have been running 10w-30 in my track car but have seen oil temps hitting 280 in the heat of the summer. The car has a Dewitts Radiator with integrated oil cooler. I was thinking of switching to 10w-40 or 15w-50 for track use. I realize it wont help reduce my temps but the thinning out wont be as severe on the heavier oils. Is 15w-50 too heavy for a stock LS6 motor? Thoughts?

drivinhard

I run it

rfn026

I run 0-30w at the track. It helps keep my temps down. Both of the oil companies that I've worked with over the past few years are believers in thin oils. They keep reminding me that "Richard - it's not 1966."

Richard Newton

AU N EGL

with oil cooler dont see oil temps above 240 now

sperkins

Me too.

argonaut

+1 more - 15W50 Amesoil

waddisme

After talking to subdriver, I went with their Premium 20-50. He says it has more detergents as my car is also a daily driver. Also, they are having an awesome sale on Amsoil right now.

Bimota Guy

Yes...Mobil 1 in the race car.

mgarfias

What he said. Works great.

rustyguns

yup! 15-50 in the Ls6 good stuff if your temps are gettin' close to 300. 30 does very little above 275

lighter does give a a tad more hp

Exotica

I run it.

johninar

me too

fatbillybob

And modern syn oils can take around 400-500 degrees before breakdown iirc.

wmckeenster

15-50 is all I use

02impactblue

sounds like many track cars are running the 15w-50. I just bought 2 5qt jugs at Walmart and will give it a try.

gkmccready

I just ended up grabbing 10w30 Redline just now; I was aiming for 10w40 but they didn't have enough in stock. And they didn't have the 15w50, either. Jumped straight to 20w50.

The Redline website said 15w50 wasn't recommended for engines that saw any significant time below 200F oil temps and if that was the case using 10w30 or 10w40 would be better. Since I was buying all the fluids to swap in a DRM Ron Davis radiator/EOC/TOC combo and I don't know where the oil temps will be for the daily drive aspect the 15w50 seemed too much for me.

John Shiels

yea but the engine can't

02impactblue

I was aiming for 10w-40 as well but the only thing I could find was "10w-40 High Mileage" recommended for engines with 75k+ miles. Does anyone know what the difference would be for regular and high mileage oils?