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I actually do a blend of the two in cars I track. Vary the ratio based on season (temperature) and how much track time I’ll see versus daily driving the vehicle.
Sorry, no scientific evidence, just my own concoction for my own sanity. But food for thought.
I use Redline 0w-40
Tests come back great using the oil life monitor
The ESP rating is all about the NOACK number (evaporation of the oil) as it effects the cats and carbon deposits on the intake valves.
For that reason I also run a catch can although I get virtually nothing out of it on track days
I use Redline 0w-40
Tests come back great using the oil life monitor
The ESP rating is all about the NOACK number (evaporation of the oil) as it effects the cats and carbon deposits on the intake valves.
For that reason I also run a catch can although I get virtually nothing out of it on track days
I assume you have a track dedicated car without cats, otherwise you would be using the ESP, right?
Oil about 270, Trans 240, coolant 220?
This is with a 16 Z51 A8 with a Dewitts radiator.
also the 16 has a bigger trans cooler than previous years and one in the front also
I'll get a better idea next week at Vir as it is supposed to be close or above 90 then
15W-50 is pretty thick when cold and I worry about startup wear and parasitic drag, which is why a lot of the pro racers have moved away from 15W-50. I'm running a C5Z with a stock engine and with an oil cooler i still see 280+ oil temps. So...I'm uncomfortable with a 0W-40 and run M1 10W-40. My Blackstone reports look great even after extended drains on what is 95% track use. .You'll get lots of opinions on this and there are probably several options. Since I'm not concerned about fuel mileage and I prelube the engine before I fire it cold, running a 0W provides no advantage for my use.
If the car has a warranty, run what GM specs and call it a day. It's funny that they'll OK the 15w50 when it's not ESP and there is no DEXOS II 15w50. I personally ran Amsoil Premium with the higher ZDDP in 10w40 all the time.
GM recommends both the 15W50 and the ESP 0W40 for the track in all but the ZR1. With the ZR1 they only recommend the 15W50 oil for the track. The problem with using the 15W50 oil on the street is it increases fuel consumption and can decrease catalytic converter life which would mean GM would be replacing cats more often under the 8 yr/80K mile emissions warranty.
For people who don't want to change the oil every time they go to and come back from the track GM says use the ESP 0W40 oil. However, from a private person's viewpoint putting in 15W50 and leaving it for the season will not hurt the engine. It only increases the amount the Customer pays for fuel and has a higher potential to need the cats replaced more often than normal.
Up until the ESP 0W40 oil became available I was using 15W50 during the track season and then changing over to 5W30 for the winter season and going back to 15W50 the next year. Now I just use the ESP 0W40 oil year round and save myself an additional oil change per year. I have the dealer do that one change per year so it is in their records.
GM recommends both the 15W50 and the ESP 0W40 for the track in all but the ZR1. With the ZR1 they only recommend the 15W50 oil for the track. The problem with using the 15W50 oil on the street is it increases fuel consumption and can decrease catalytic converter life which would mean GM would be replacing cats more often under the 8 yr/80K mile emissions warranty.
For people who don't want to change the oil every time they go to and come back from the track GM says use the ESP 0W40 oil. However, from a private person's viewpoint putting in 15W50 and leaving it for the season will not hurt the engine. It only increases the amount the Customer pays for fuel and has a higher potential to need the cats replaced more often than normal.
Up until the ESP 0W40 oil became available I was using 15W50 during the track season and then changing over to 5W30 for the winter season and going back to 15W50 the next year. Now I just use the ESP 0W40 oil year round and save myself an additional oil change per year. I have the dealer do that one change per year so it is in their records.
Bill
Agree with Bill & others, I do not see it wise to street drive 15w-50, startup wear would be a "lot" (technical jargon) until it flows & warms. Right?
My c6z has 0-40 & will post a Blackstone sometime this year, my 1st Blackstone with unknown oil was good 12k miles now. 2013.
06-19-2019, 11:06 AM
Esp 0W-40 vs 15W-50
